Rain gutter system

Abstract

We provide a rain gutter system that reduces the possibility of damage while maintaining watertightness. [Solution] The rain gutter system 1 includes a drainage member 4 positioned on the bottom wall 20 of a gutter 2 fixed to the roof 10a of a building 10 and receiving rainwater from the roof 10a, a downpipe 50 fixed to the wall surface of the building 10 and a piping section 5 connected to the drainage member 4, and a movable member 6 located between the drainage member 4 and the upstream end of the downpipe 50, which is at least partially flexible so as to allow the drainage member 4 to move relative to the downpipe 50 in a direction intersecting the central axis C50 of the downpipe 50.

Description

Technical Field

[0001] The present disclosure relates to a gutter system.

Background Art

[0002] Patent Document 1 discloses a drain for an eaves gutter. The drain for an eaves gutter consists of a locking cylinder, a drainage cylinder, and a flexible socket. The locking cylinder consists of a cylindrical portion, an upper flange provided so as to project outward at the upper end of this cylindrical portion, and a net-shaped drain cap attached so as to cover the opening of this upper flange. The drainage cylinder consists of a cylindrical portion and a lower flange provided so as to project outward at the upper end of this cylindrical portion. This cylindrical portion has a tapered outer peripheral surface whose outer diameter gradually decreases from top to bottom, and an annular recess is provided along the circumferential direction at the upper part of this outer peripheral surface. The flexible socket is a cylindrical body provided with a locking piece that projects inward at the upper end, and the lower part serves as a connection portion for attaching a downspout or an elbow. Then, the drainage cylinder is inserted into this flexible socket, and the locking piece of the flexible socket is movably locked to the recess of the drainage cylinder.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the drain for an eaves gutter disclosed in Patent Document 1, due to the temperature difference between summer and winter, the eaves gutter expands and contracts, and when the eaves gutter moves in the direction along the eaves tip, the locking cylinder and the drainage cylinder attached to the eaves gutter move in the direction along the eaves tip together with the eaves gutter. However, since the locking piece of the flexible socket between the downspout and the drainage cylinder is movably locked to the recess of the drainage cylinder, it absorbs the movement of the drainage cylinder.

[0005] However, in gutter drains, there is a gap between the locking piece of the adjustable socket and the recess of the drain pipe. Air entering the downpipe through this gap can contribute to a decrease in drainage performance.

[0006] This disclosure provides a rain gutter system that can reduce the possibility of damage while maintaining watertightness. [Means for solving the problem]

[0007] A rain gutter system according to one aspect of the present disclosure includes a drainage member positioned on the bottom wall of a gutter fixed to the roof of a building and receiving rainwater from the roof; a downpipe fixed to the wall surface of the building and connected to the drainage member; and a movable member located between the drainage member and the upstream end of the downpipe, at least in part being flexible, so as to allow the drainage member to move relative to the downpipe in a direction intersecting the central axis of the downpipe. [Effects of the Invention]

[0008] The aspects of this disclosure can reduce the possibility of damage while maintaining watertightness. [Brief explanation of the drawing]

[0009] [Figure 1] Schematic diagram of the rain gutter system according to Embodiment 1 [Figure 2] Perspective view of the gutter and support bracket of the rain gutter system according to Embodiment 1 [Figure 3] Cross-sectional view of the drainage member and eaves gutter of the rain gutter system according to Embodiment 1 [Figure 4] Cross-sectional view of one side of the movable member of the rain gutter system according to Embodiment 1 [Figure 5] Schematic diagram illustrating the operation of the movable member in the rain gutter system according to Embodiment 1. [Figure 6] Schematic diagram of the rain gutter system according to Embodiment 2 [Figure 7] Schematic diagram of the rain gutter system according to Embodiment 3 [Figure 8] Schematic diagram of the rain gutter system according to Embodiment 4 [Figure 9] Schematic diagram of the rain gutter system according to Embodiment 5 [Figure 10] Schematic diagram of the rain gutter system according to Embodiment 6 [Figure 11] Schematic diagram of the rain gutter system according to Embodiment 7 [Figure 12] Schematic diagram of the rain gutter system according to Embodiment 8 [Figure 13] Schematic diagram of the rain gutter system according to Embodiment 9 [Figure 14] One-sided cross-sectional view of the movable member according to a modification

Modes for Carrying Out the Invention

[0010] [1. Embodiment] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings as appropriate. However, the following embodiments are examples for explaining the present disclosure, and are not intended to limit the present disclosure to the following contents (for example, the shape, dimensions, arrangement, etc. of each component). The positional relationships such as up, down, left, and right are based on the positional relationships shown in the drawings unless otherwise specified. Each drawing described in the following embodiments is a schematic drawing, and the ratios of the sizes and thicknesses of each component in each drawing do not necessarily reflect the actual dimensional ratios. Also, the dimensional ratios of each element are not limited to the ratios shown in the drawings. <l

[0011] In the following description, when it is necessary to distinguish between a plurality of components from each other, prefixes such as "first", "second", etc. are attached to the names of the components. However, when the components can be distinguished from each other by the reference numerals attached to the components, the prefixes such as "first", "second", etc. may be omitted in consideration of the readability of the text.

[0012] In the following description, when it is necessary to distinguish between a plurality of components from each other, suffixes such as "-1", "-2", etc. are attached to the reference numerals of the components. However, when it is not necessary to distinguish between a plurality of components, the suffixes such as "-1", "-2", etc. may be omitted in consideration of the readability of the text.

[0013] [1.1 Embodiment 1] [1.1.1 Structure] 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 step portion on the ground. The rainwater collected in the step portion flows out from the step portion through the buried pipe 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, airports, etc. The roof 10a may be a flat roof or a folded-plate roof. In FIG. 1, the roof 10a is a folded-plate roof.

[0014] The rain gutter system 1 includes an eaves gutter 2, a receiver 3, a drainage member 4, a piping section 5, and a movable member 6.

[0015] FIG. 2 is a perspective view of the eaves gutter 2 and the receiver 3 of the rain gutter system 1. The rain gutter system 1 includes a plurality of receivers 3. The number and position of the receivers 3 may be appropriately set according to the shape of the building 10 and the like.

[0016] The gutter 2 receives rainwater from the roof 10a of the building 10. For example, the gutter 2 is installed at the eaves of the roof 10a of the building 10. In particular, the gutter 2 is positioned to extend along the eaves of the roof 10a of the building 10. The gutter 2 comprises a bottom wall 20, a first side wall 21, and a second side wall 22. The first side wall 21 and the second side wall 22 are also called vertical walls. The bottom wall 20 is plate-shaped with length, width, and thickness. In Figure 2, the bottom wall 20 is rectangular. In the longitudinal direction of the bottom wall 20, the width and thickness of the bottom wall 20 are approximately constant. A drain opening 20a is formed in the bottom wall 20 according to the overall design of the gutter system 1. 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 with length, width, and thickness. The first side wall 21 and the second side wall 22 are rectangular plate-shaped. In the longitudinal direction of the first side wall 21 and the second side wall 22, the width and thickness of the first side wall 21 and the second side wall 22 are approximately constant.

[0017] In this embodiment, the bottom wall 20, the first side wall 21, and the second side wall 22 are integrally formed. The bottom wall 20, the first side wall 21, and the second side wall 22 constitute a gutter member. The gutter member is formed, for example, by extrusion molding of a resin material. The gutter member may be equipped with a core material to reinforce the overall strength of the gutter 2. The core material may be, for example, made of metal. In addition to the gutter member, the gutter 2 is equipped with an end member. The end member is fixed to both sides in the longitudinal direction of the bottom wall 20 of the gutter member and covers the openings on both sides in the longitudinal direction of the bottom wall 20 of the gutter member.

[0018] In this embodiment, the eaves gutter 2 is transported to the site in a predetermined shape by extrusion molding of a resin material. Unlike the case where the eaves gutter is formed from a metal plate, such as a steel plate (also called a coil), no on-site processing is required. Specifically, since processes such as cutting the coil, bending the coil, applying sealant to seal joints, and curing do not need to be performed on-site, there is no problem of increased on-site work hours, and the installation of the rain gutter system 1 can be easily carried out.

[0019] In the eaves gutter 2, let the length of the first straight line connecting the upper end and the lower end of the first side wall 21 be L1, the angle between the thickness direction of the bottom wall 20 and the first straight line be θ1, and the height of the first side wall 21 be H1. The eaves gutter 2 satisfies H1 = L1cosθ1. Similarly, let the length of the second straight line connecting the upper end and the lower end of the second side wall 22 be L2, the angle between the thickness direction of the bottom wall 20 and the second straight line be θ2, and the height of the second side wall 22 be H2. The eaves gutter 2 satisfies H2 = L2cosθ2.

[0020] Let the positive direction of θ1 be the direction in which the upper end of the first side wall 21 moves away from the upper end of the second side wall 22 (counterclockwise direction in FIG. 1), and it is preferable to satisfy θ1 ≥ 0°. If the positive direction of θ2 is the direction in which the upper end of the second side wall 22 moves away from the upper end of the first side wall 21 (clockwise direction in FIG. 1), it is preferable to satisfy θ2 ≥ 0°.

[0021] In the present embodiment, the first side wall 21 is on the opposite side of the building 10 with respect to the second side wall 22. When H1 < H2, the rainwater accumulated in the eaves gutter 2 is more likely to leak to the opposite side of the building 10. From the above, the eaves gutter 2 preferably satisfies H1 ≥ H2, and in the present embodiment, H1 > H2.

[0022] In the eaves gutter 2, local water level drops are likely to occur in the regions on both sides of the drain hole 20a in the width direction of the bottom wall 20. The narrower this region is, 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 drainage member 4 is exposed from the water surface, air can flow in from the drainage member 4. The inflow of air from the drainage member 4 is one of the factors causing 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.

[0023] According to the JIS K 6741 standard for rigid polyvinyl chloride pipes (general), the inner diameter of a VU pipe with a nominal diameter of 125 is approximately 131 mm. In this case, the inner diameter of the drain outlet 20a is also set to 131 mm. When the center of the drain outlet 20a coincides with the center of the bottom wall 20 in the width direction, there is a margin of a predetermined distance on both sides of the drain outlet 20a. The larger the predetermined distance, the larger the aforementioned area becomes, and thus the effect of localized water level drops can be reduced. When using a VU pipe with a nominal diameter of 125, from the viewpoint of ensuring a sufficient margin, the width W of the bottom wall 20 of the gutter 2 should satisfy W ≥ 200 mm. This can suppress the inflow of air into the drainage member 4 even at high flow rates, and prevent a reduction in drainage performance.

[0024] It is preferable that the gutter 2 has a capacity such that rainwater does not overflow until the siphon effect occurs. In the gutter 2, as mentioned above, W ≥ 200 mm in order to reduce drainage performance. From the viewpoint of preventing overflow, let's consider the case where W = 200 mm. In the gutter 2, it is known that the siphon effect does not occur instantaneously, and that it takes some time for the siphon effect to occur. And, when the rainfall is 160 mm / h, considering the time it takes for the siphon effect to occur, it has been found that if there is no overflow until 16 seconds have passed since the rain started, the siphon effect will occur and the rainwater will be able to be drained without overflowing. Therefore, from this viewpoint, it is preferable that the gutter 2 satisfies H2 ≥ 200 mm. This makes it possible to secure a sufficiently safe height for the gutter 2, taking into account the lead time until the siphon effect occurs.

[0025] From the perspective of ensuring an even greater margin, it is preferable that the gutter 2 satisfies W ≥ 240 mm. It is even more preferable that the gutter 2 satisfies W ≥ 350 mm.

[0026] Because the gutter 2 is relatively thin, if W becomes too large, it may become difficult to maintain the shape of the gutter 2 itself. From this perspective, it is preferable that the gutter 2 satisfies W ≤ 450 mm. It is even more preferable that the gutter 2 satisfies W ≤ 400 mm.

[0027] In the gutter 2, as W increases, the moment of force applied to the support 3 by the first side wall 21 increases. An increase in the moment of force applied to the support 3 may increase the required strength of the support 3. Therefore, it is preferable that W is not too large. If W is greater than H2, the gutter 2 will have a flattened shape overall. If the gutter 2 has a flattened shape, there is an increased possibility that rainwater falling into the gutter 2 from the roof 10a will hit the bottom wall 20, bounce off, and escape from the gutter 2 to the outside. In other words, the gutter 2 may not be able to receive rainwater from the roof 10a as easily. Also, the area of ​​the bottom wall 20 (the bottom area of ​​the gutter 2) increases, making it more susceptible to the effects of wind, etc. From the above, in terms of the relationship between H2 and W, it is preferable that the gutter 2 satisfies H2 / W ≥ 0.5. In particular, it is more preferable that the gutter 2 satisfies H2 / W ≥ 2 / 3.

[0028] In the gutter 2, if H2 is large, the gutter 2 will have a vertically elongated shape overall. If the gutter 2 has a vertically elongated shape, the vertical dimension of the gutter 2 will be too large relative to the thickness of the roof 10a. For the above reasons, it is preferable that the gutter 2 satisfies H2 / W ≤ 2.5.

[0029] The support bracket 3 supports the gutter 2. The support bracket 3 is used to install the gutter 2 at the eaves of the roof 10a of the building 10.

[0030] The support 3 comprises a support portion 30, arm portions 31 and 32, and a connecting portion 33. The support portion 30 extends in the width direction of the bottom wall 20 of the gutter 2 and supports the lower surface of the bottom wall 20. The support portion 30 is plate-shaped with length, width, and thickness. The arm portions 31 and 32 extend upward from both sides of the support portion 30. Each of the arm portions 31 and 32 is plate-shaped with length, width, and thickness. The connecting portion 33 connects the arm portions 31 and 32 on the upper surface side of the bottom wall 20 of the gutter 2. The connecting portion 34 prevents the arm portions 31 and 32 from deforming in a direction that separates them from each other. The connecting portion 34 connects the upper ends of the arm portions 31 and 32. The connecting portion 34 may be used to attach the support 3 to the roof 10a of the building 10 using bolts or the like. The receiving device 3 may be formed using one or more metal plates, and the multiple metal plates may be fixed to each other by fasteners such as screws or by welding.

[0031] The drainage member 4 is positioned at the outlet 20a of the gutter 2. The drainage member 4 can reduce the generation of vortices and the entrainment of air at the outlet 20a. Such a drainage member 4 may contribute to the generation of a siphon effect.

[0032] Figure 3 is a cross-sectional view of the drainage member 4 and the eaves gutter 2 of the rain gutter system 1.

[0033] The drainage member 4 comprises a drain pipe portion 41, a funnel portion 42, one or more blades 43, and a joint portion 44. In the drainage member 4, the drain pipe portion 41, the funnel portion 42, and the one or more blades 43 are formed as a continuous, integral first component, while the joint portion 44 is formed as a second component separate from the first component.

[0034] The drain pipe section 41 has an upstream end 41a and a downstream end 41b. The drain pipe section 41 further has a drain outlet 41c. The drain outlet 41c is the internal space between the upstream end 41a and the downstream end 41b of the drain pipe section 41.

[0035] The drain pipe section 41 comprises a cylindrical section 411 and a flange 412. The cylindrical section 411 is cylindrical in shape with no change in inner or outer diameter. Male threads 411a are formed on the outer circumferential surface of the cylindrical section 411. The flange 412 is located at the upstream end of the cylindrical section 411 and extends radially outward from the cylindrical section 411. The flange 412 is annular in shape. In the drain pipe section 41, the flange 412 defines the upstream end 41a, and the downstream end of the cylindrical section 411 defines the downstream end 41b.

[0036] The drain pipe section 41 includes a connecting section 413 between the upstream end of the cylindrical section 411 and the flange 412. The connecting section 413 is cylindrical in shape, with its inner diameter gradually increasing from the cylindrical section 411 towards the flange 412. Therefore, in a cross-section passing through the central axis C41 of the drain pipe section 41, the inner circumferential surface of the connecting section 413 is a smooth, arc-shaped curved surface.

[0037] The funnel portion 42 is located at the upstream end 41a of the drain pipe portion 41. More specifically, the funnel portion 42 is positioned opposite the upstream end 41a of the drain pipe portion 41, such that the central axis C42 of the funnel portion 42 coincides with the central axis C41 of the drain pipe portion 41.

[0038] The funnel section 42 has a first opening 42a and a second opening 42b. The funnel section 42 directs the fluid flowing in through the first opening 42a to the outlet 41c of the drain pipe section 41 through the second opening 42b.

[0039] The funnel portion 42 has a reduced diameter portion 421, a small diameter cylindrical portion 422, and a flange 423.

[0040] The reduced-diameter section 421 is cylindrical in shape, with its outer and inner diameters decreasing as it approaches the drain pipe section 41. The reduced-diameter section 421 can also be described as a hollow frustoconical shape with open ends. In this embodiment, the maximum outer diameter of the reduced-diameter section 421 is smaller than the inner diameter of the drain pipe section 41 (the inner diameter of the cylindrical section 411). In this embodiment, the inclination angle of the inner surface of the reduced-diameter section 421 in a cross-section passing through the central axis C42 of the funnel section 42 is between 40 degrees and 60 degrees.

[0041] The small-diameter cylindrical section 422 extends from the end of the reduced-diameter section 421 on the drain pipe section 41 side (the lower end in Figure 3) towards the drain pipe section 41. The small-diameter cylindrical section 422 is cylindrical with less change in inner and outer diameter than the reduced-diameter section 421. The inside of the small-diameter cylindrical section 422 is connected to the inside of the reduced-diameter section 421.

[0042] The flange 423 extends radially outward from the end of the reduced-diameter portion 421 opposite to the drain pipe portion 41 (the upper end in Figure 3). The flange 423 is annular. In this embodiment, the outer diameter of the flange 423 is smaller than the inner diameter of the drain pipe portion 41 (the inner diameter of the pipe portion 411).

[0043] In the funnel portion 42, the opening at the end of the reduced-diameter portion 421 opposite to the drain pipe portion 41 is the first opening 42a, and the opening at the end of the small-diameter cylindrical portion 422 on the drain pipe portion 41 side is the second opening 42b.

[0044] In this embodiment, the funnel portion 42 is not located inside the drain pipe portion 41. Here, in the direction of the central axis C41 of the drain pipe portion 41, the distance between the second opening 42b and the drain pipe portion 41 is preferably less than half the distance between the first opening 42a and the drain pipe portion 41. In this embodiment, the distance between the second opening 42b and the drain pipe portion 41 is 0.

[0045] Here, let D be the inner diameter of the drain opening 412c, and let d be the diameter representing the outer shape of the funnel portion 42 as viewed from the direction of the central axis C41 of the drain pipe portion 41. Preferably, d is set to satisfy 0.6D ≤ d ≤ 1.5D. In this embodiment, d ≤ 1.0D. Here, the diameter d may be the diameter of the largest circle that tangent to any two points of the funnel portion 42 as viewed from the direction of the central axis C41 of the drain pipe portion 41. In this embodiment, since the funnel portion 42 is circular as viewed from the direction of the central axis C41 of the drain pipe portion 41, the diameter d is equal to the diameter of the funnel portion 42 as viewed from the direction of the central axis C41 of the drain pipe portion 41 (especially the diameter of the flange 423).

[0046] In this embodiment, there are five blades 43. The five blades 43 are the same shape. When viewed from the direction of the central axis C41 of the drain pipe 41, the five blades 43 are arranged at equal intervals around the central axis C41 of the drain pipe 41.

[0047] The blades 43 connect the drain pipe section 41 and the funnel section 42. More specifically, the blades 43 connect the upstream end 41a of the drain pipe section 41 to the side of the funnel section 42 opposite to the drain pipe section 41. In other words, the funnel section 42 is positioned at the upstream end 41a of the drain pipe section 41 so as to be suspended from the blades 43.

[0048] The wing 43 comprises a main body 431, an arm 432, and a reinforcing part 433.

[0049] The main body portion 431 is plate-shaped. In particular, the main body portion 431 is rectangular in shape. The main body portion 431 protrudes from the upstream end 41a of the drain pipe portion 41. In particular, the main body portion 431 protrudes from the upstream end 41a of the drain pipe portion 41 along the central axis C41 of the drain pipe portion 41. The direction of the central axis C41 of the drain pipe portion 41 corresponds to the height direction of the main body portion 431. The main body portion 431 extends in the radial direction of the drain pipe portion 41 when viewed from the direction of the central axis C41 of the drain pipe portion 41. The radial direction of the drain pipe portion 41 corresponds to the length direction of the main body portion 431. The width direction (thickness direction) of the main body portion 431 is perpendicular to the radial direction of the drain pipe portion 41 when viewed from the direction of the central axis C41 of the drain pipe portion 41. The width of the main body portion 431 defines the width of the blades 43. The width of the blades 43 is preferably 2 mm or more and 6 mm or less.

[0050] The main body portion 431 has a first end portion 431a, a second end portion 431b, a third end portion 431c, and a fourth end portion 431d.

[0051] The first end 431a and the second end 431b are the ends of the main body 431 in the longitudinal direction. In particular, the first end 431a is the end of the drain pipe 41 on the side of the central axis C41 when viewed from the direction of the central axis C41 of the drain pipe 41. The second end 431b is the end of the drain pipe 41 on the opposite side of the central axis C41 when viewed from the direction of the central axis C41 of the drain pipe 41.

[0052] When viewed from the direction of the central axis C41 of the drain pipe section 41, the corners of the first end 431a and the second end 431b are convex fillet-shaped. This makes it less likely for a worker's hand to hurt when touching the corners of the first end 431a or the second end 431b when holding the blade 43 during the installation of the drain member 4. Therefore, it is easier for a worker to hold the blade 43 during the installation of the drain member 4. Note that when viewed from the direction of the central axis C41 of the drain pipe section 41, the corners of the first end 431a or the second end 431b may be tapered.

[0053] Let b be the distance between the upstream end 41a and the central axis C41 of the drain pipe section 41, as viewed from the direction of the central axis C41 of the drain pipe section 41. It is preferable that b be set to satisfy 0.40d ≤ b ≤ 0.75d. When b is 0.40d or greater, the space between the drain pipe section 41, the funnel section 42, and the blades 43 can be widened while obtaining the flow straightening effect of the blades 43, thereby further suppressing the deterioration of drainage function caused by foreign matter. On the other hand, if b becomes too large, the entire drainage member 4 will become larger, so it is preferable that b be 0.75d or less.

[0054] In particular, in this embodiment, when viewed from the direction of the central axis C41 of the drain pipe section 41, the first end portion 431a is located outside the reduced diameter section 421. This allows for a further widening of the space between the drain pipe section 41, the funnel section 42, and the blades 43. Therefore, it is possible to further suppress the deterioration of drainage function caused by foreign matter. In addition, a swirling flow is more likely to occur between the reduced diameter section 421 and the blades 43, and an improvement in drainage function can be expected.

[0055] In particular, in this embodiment, when viewed from the direction of the central axis C41 of the drain pipe section 41, the first end portion 431a is located outside the flange 423. This configuration allows for a further widening of the space between the drain pipe section 41, the funnel section 42, and the blades 43. This further suppresses the deterioration of drainage function caused by foreign matter. On the other hand, when viewed from the direction of the central axis C41 of the drain pipe section 41, the first end portion 431a is located inside the outlet 412c of the drain pipe section 41. This allows for an improvement in the flow straightening effect of the blades 43. The first end portion 431a is inclined to move away from the central axis C41 of the drain pipe section 41 as it approaches the drain pipe section 41 along the central axis C41 of the drain pipe section 41. This widens the space between the drain pipe section 41, the funnel section 42, and the blades 43. This further suppresses the deterioration of drainage function caused by foreign matter.

[0056] The third end 431c and the fourth end 431d are the ends of the main body 431 in the height direction. In particular, the third end 431c is the end opposite to the drain pipe 41 in the direction of the central axis C41 of the drain pipe 41. The fourth end 431d is the end on the drain pipe 41 side in the direction of the central axis C41 of the drain pipe 41.

[0057] The third end portion 431c is further from the drain pipe portion 41 than the upper surface of the flange 423 of the funnel portion 42, in the direction of the central axis C41 of the drain pipe portion 41. The distance a between the third end portion 431c and the surface of the funnel portion 42 opposite to the drain pipe portion 41 (the upper surface of the flange 423), in the direction of the central axis C41 of the drain pipe portion 41, is 5 mm or more and 15 mm or less. This makes it possible to improve the strength of the connection between the funnel portion 42 and the blade 43. Here, a is more preferably 9 mm.

[0058] The fourth end portion 431d is also the portion of the main body portion 431 that is connected to the drain pipe portion 41.

[0059] In the direction of the central axis C41 of the drain pipe section 41, the main body section 431 is connected to the flange 412 and the connecting section 413 of the drain pipe section 41, but not to the pipe section 411. That is, when viewed from the direction of the central axis C41 of the drain pipe section 41, the main body section 431 does not protrude into the outlet 412c of the drain pipe section 41. This allows for a wider space between the drain pipe section 41, the funnel section 42, and the blades 43. This further suppresses the deterioration of drainage function caused by foreign matter. Furthermore, since the main body section 431 extends not only to the flange 412 of the drain pipe section 41 but also to the connecting section 413, the strength of the blades 43 can be maintained.

[0060] In this embodiment, the main body portion 431 has a fillet 431e at the end (fourth end 41d) on the drain pipe portion 41 side, which increases the width of the main body portion 431 as it approaches the drain pipe portion 41 in the direction of the central axis C41 of the drain pipe portion 41. In this embodiment, the fillet 431e may be present on both sides in the width direction of the main body portion 431. The surface of the fillet 431e is concave. The fillet 431e enables improved strength of the vane 43 against the drain pipe portion 41. In this embodiment, the fillet 431e extends along the main body portion 431 and, like the main body portion 431, extends not only to the flange 412 of the drain pipe portion 41 but also to the connecting portion 413. At least one of the radius of curvature or width of the fillet 431e decreases from the second end 431b to the first end 431a of the main body portion 431. This enables improved drainage function by the fillet 41e. The radius of curvature or width of the fillet 431e may be reduced to 0.

[0061] The arm portion 432 connects the surface (top surface) of the funnel portion 42 opposite to the drain pipe portion 41 to the main body portion 431. The arm portion 432 protrudes toward the funnel portion 42 from the end (third end portion 431c) of the main body portion 431 opposite to the drain pipe portion 41. When viewed from the direction of the central axis C41 of the drain pipe portion 41, the arm portion 432 extends in the radial direction of the drain pipe portion 41. The width direction of the arm portion 432 is perpendicular to the radial direction of the drain pipe portion 41 when viewed from the direction of the central axis C41 of the drain pipe portion 41. As an example, the width of the arm portion 432 is preferably 2 mm or more and 6 mm or less.

[0062] The arm portion 432 extends from the main body portion 431 to the flange 423 and the reduced diameter portion 421 of the funnel portion 42. The arm portion 432 connects the flange 423 and the reduced diameter portion 421 to the main body portion 431. The height of the arm portion 432 relative to the drain pipe portion 41 decreases as it approaches the center of the reduced diameter portion 421. This increases the inflow of rainwater into the funnel portion 42. Furthermore, even when rainwater flows into the funnel portion 42, the possibility of vortex formation in the drain pipe portion 41 can be reduced.

[0063] Let c be the length of the connection between the arm portion 432 and the funnel portion 42 as viewed from the direction of the central axis C41 of the drain pipe portion 41. It is preferable that c be set to satisfy 0.1d ≤ c ≤ 0.5D. When c is 0.1d or greater, it is possible to improve the strength of the connection between the funnel portion 42 and the blade 43. When c is 0.5D or less, it is possible to form a first opening 42a and a second opening 42b of sufficient size in the funnel portion 42. Let e ​​be the distance between the tip of the arm portion 432 and the central axis C41 of the drain pipe portion 41 as viewed from the direction of the central axis C41 of the drain pipe portion 41. It is preferable that e ≤ 0.25d. This is possible to improve the strength of the connection between the funnel portion 42 and the blade 43.

[0064] The width of the arm portion 432 increases as it approaches the central axis C41 of the drain pipe portion 41, when viewed from the direction of the central axis C41 of the drain pipe portion 41. This allows for improved strength of the connection between the funnel portion 42 and the blades 43. The minimum width of the arm portion 432 is equal to the width of the main body portion 431.

[0065] The wrist part 432 has a fillet 432a at the end (lower end) on the side of the drain tube part 41, and the width of the wrist part 432 increases as it approaches the drain tube part 41 in the direction of the central axis C41 of the drain tube part 41. In the present embodiment, the fillets 432a are on both sides in the width direction of the wrist part 432. The surface of the fillet 432a is a concave surface. The fillet 432a enables an improvement in the connection strength between the funnel part 42 and the blade 43. In the present embodiment, the fillet 432a extends along the wrist part 432, and similar to the wrist part 432, it extends not only to the flange 423 of the funnel part 42 but also to the reduced-diameter part 421. In particular, at the tip of the fillet 432a, at least one of the radius of curvature or the width of the fillet 432a becomes smaller as it approaches the central axis C41 of the funnel part 42. This enables an improvement in the drainage function by the fillet 42c. The radius of curvature or the width of the fillet 432a may decrease to 0.

[0066] The reinforcing part 433 is provided to improve the strength of the blade 43. The reinforcing part 433 is located at a position overlapping with the outer peripheral part of the funnel part 42 (the outer peripheral part of the flange 423) when viewed from the direction of the central axis C41 of the drain tube part 41. The width direction of the reinforcing part 433 is orthogonal to the radial direction of the drain tube part 41 when viewed from the direction of the central axis C41 of the drain tube part 41. The width of the reinforcing part 433 increases as it approaches the funnel part 42 (flange 423) in the direction of the central axis C41 of the drain tube part 41. When a force is applied to the funnel part 42 or the blade 43, stress tends to concentrate on the part of the blade 43 corresponding to the outer peripheral part of the funnel part 42. Therefore, the presence of the reinforcing part 433 can reduce the possibility of damage to the blade 43 due to such stress. Let the width of the main body part 431 be t and the maximum value of the width of the reinforcing part 433 be t1. It is preferable that t1 is set to satisfy 1.1t < t1 < 1.4t.

[0067] In this embodiment, the reinforcing portion 433 is positioned to overlap with the outer circumference of the funnel portion 42 (the outer circumference of the flange 423) when viewed from the direction of the central axis C41 of the drain pipe portion 41. Furthermore, in the direction of the central axis C41 of the drain pipe portion 41, the surface of the reinforcing portion 433 facing the drain pipe portion 41 is further away from the drain pipe portion 41 than the surface of the outer circumference of the funnel portion 42 facing the drain pipe portion 41 (the lower surface of the flange 423). As a result, there is a gap G between the main body portion 431 and the end of the outer circumference of the funnel portion 42 facing the drain pipe portion 41. Due to this gap G, the blades 43 do not come into contact with the radially outer end of the drain pipe portion 41 on the lower surface of the flange 423. Due to this gap G, the main body portion 431 of the blades 43 and the flange 423 of the funnel portion 42 are spaced apart from each other in the radial direction of the drain pipe portion 41. Therefore, the space between the drain pipe section 41, the funnel section 42, and the blades 43 can be widened, making it possible to further suppress the deterioration of drainage function caused by foreign matter. In particular, the presence of the gap G makes it easier for swirling flow to occur between the reduced diameter section 421 and the blades 43, and an improvement in drainage function can be expected.

[0068] The joint 44 is used to fix the drain member 4 to the gutter 2 and to connect the drain member 4 to the piping 5.

[0069] The joint portion 44 has a cylindrical portion 441 and a flange 442. The cylindrical portion 441 is cylindrical in shape. Female threads 441a are formed on the inner circumferential surface of the cylindrical portion 441. The inner diameter of the cylindrical portion 441 is larger than the outer diameter of the cylindrical portion 411 of the drain pipe portion 41. The female threads 441a of the cylindrical portion 441 correspond to the male threads 411a of the drain pipe portion 41. The flange 412 is located at the upstream end of the cylindrical portion 441 (the upstream end in Figure 3) and extends radially outward from the cylindrical portion 441. In this embodiment, there is a connecting portion 443 between the upstream end of the cylindrical portion 441 and the flange 442. The connecting portion 443 is cylindrical in shape, with its inner diameter gradually increasing from the cylindrical portion 441 toward the flange 442.

[0070] In the drainage member 4, the first component, which includes the drain pipe section 41, the funnel section 42, and the blades 43, is fixed to the gutter 2 using the second component, the joint section 44. As shown in Figure 3, the first component (drain pipe section 41, funnel section 42, and blades 43) is positioned at the outlet 20a of the gutter 2. Here, the cylindrical section 411 of the drain pipe section 41 is located below the outlet 20a of the bottom wall 20 of the gutter 2, and the flange 412 of the drain pipe section 41 is at the bottom surface of the upper surface around the outlet 20a of the bottom wall 20 of the gutter 2. The joint section 44 is attached to the cylindrical section 411 of the drain pipe section 41 below the outlet 20a of the gutter 2. Specifically, the male thread 411a of the cylindrical section 411 and the female thread 441a of the cylindrical section 441 are connected. The flange 442 of the joint 44 rests on the lower surface around the drain opening 20a of the bottom wall 20 of the gutter 2. In this way, the flange 412 of the drain pipe 41 and the flange 442 of the joint 44 sandwich the bottom wall 20 of the gutter 2 from both the top and bottom sides, thereby attaching the drain member 4 to the gutter 2.

[0071] When the drain member 4 is attached to the gutter 2, the cylindrical portion 411 of the drain pipe portion 41 is located within the cylindrical portion 441 and connecting portion 443 of the joint portion 44. The positional relationship between the joint portion 44 and the drain pipe portion 41 is affected by the thickness of the bottom wall 20 of the gutter 2, but the upstream end of the cylindrical portion 441 of the joint portion 44 is located downstream of the upstream end of the cylindrical portion 411 of the drain pipe portion 41 in the direction of the central axis C41 of the drain pipe portion 41.

[0072] Refer to Figure 1 again. Piping section 5 defines the flow path from the gutter 2 to the manhole. Piping section 5 comprises a downpipe 50 and a socket 51. Piping section 5 is a piping configuration in which the central axis C2 of the rainwater outlet 20a from the building 10 coincides with the central axis C50 of the downpipe 50. This piping configuration is conventionally also called the straight pipe type.

[0073] The downpipe 50 primarily defines a vertical flow path. The downpipe 50 is fixed to the wall of the building 10. The downpipe 50 is a straight pipe. The cross-section perpendicular to the central axis C50 of the downpipe 50 is circular. The downpipe 50 is positioned so that the direction of the central axis C50 of the downpipe 50 coincides with the vertical direction. The upstream end of the downpipe 50 is connected to the outlet 20a. The downstream end of the downpipe 50 is inserted into the manhole. The length of the downpipe 50 is preferably 3m or more. The downpipe 50 may be composed of one or more straight pipes. That is, the downpipe 50 may be composed of multiple straight pipes connected to each other, rather than a single straight pipe.

[0074] For example, the material of the downpipe 50 is rigid polyvinyl chloride. The dimensions of the downpipe 50, such as the outer diameter and thickness, may be set in accordance with the standard for rigid polyvinyl chloride pipes (general) in JIS K 6741 "Rigid Polyvinyl Chloride Pipes".

[0075] The inner diameter of the piping section 5 defines the cross-sectional area of ​​the flow path. The inner diameter of the piping section 5 may be set appropriately according to the drainage performance required for the rain gutter system 1. The dimensions of the piping section 5, for example, the outer diameter and thickness, may be set in accordance with the standard for rigid polyvinyl chloride pipes (general) of JIS K 6741 "Rigid polyvinyl chloride pipes".

[0076] Table 1 shows an example of nominal diameters for VP rigid polyvinyl chloride pipes in the JIS K 6741 standard for rigid polyvinyl chloride pipes (general). In Table 1, the units for outer diameter (standard dimension), thickness (minimum dimension), and approximate inner diameter are mm.

[0077] [Table 1]

[0078] Table 2 shows an example of nominal diameters for VU rigid polyvinyl chloride pipes in the JIS K 6741 standard for rigid polyvinyl chloride pipes (general). In Table 2, the units for outer diameter (standard dimension), thickness (minimum dimension), and approximate inner diameter are mm.

[0079] [Table 2]

[0080] The inner diameter of the piping section 5 may be set based on an approximate inner diameter corresponding to the nominal diameter of the pipe. In this embodiment, the inner diameter of the piping section 5 may be set to satisfy 70 mm ≤ D ≤ 150 mm. For example, the inner diameter of the piping section 5 may be set to correspond to any of the nominal diameters of 75 mm, 100 mm, or 125 mm.

[0081] Socket 51 is used to connect the downpipe 50 and the drainage member 4. Socket 51 has an upstream receiving end and a downstream receiving end. The upstream end of the downpipe 50 is connected to the downstream receiving end of socket 51. A joint 44 can be connected to the downstream receiving end of socket 51. As will be described in more detail later, a movable member 6 is connected to the downstream receiving end of socket 51 instead of a joint 44. For example, the material of socket 51 is rigid polyvinyl chloride. The dimensions of socket 51, for example, the outer diameter and thickness, may be set in accordance with the socket standard of JIS K 6739 "Rigid polyvinyl chloride pipe fittings for drainage".

[0082] The movable member 6 is located between the drainage member 4 and the upstream end of the downpipe 50. The movable member 6 has a receiving port 6a facing upstream and an insertion port 6b facing downstream. In this embodiment, the drainage member 4 is connected to the receiving port 6a, and the insertion port 6b is connected to the upstream receiving port of the socket 51 of the piping section 5. In this way, the movable member 6 is connected between the drainage member 4 and the socket 51 of the piping section 5.

[0083] The movable member 6 will be described in more detail below with reference to Figure 4. Figure 4 is a cross-sectional view of one side of the movable member 6.

[0084] The movable member 6 comprises a main body 60, a ring 61, and a fixing device 62.

[0085] The main body 60 is tubular in shape. The cross-section perpendicular to the central axis of the main body 60 is circular. The main body 60 includes a first cylindrical section 601, a second cylindrical section 602, and a third cylindrical section 603. The first cylindrical section 601, the second cylindrical section 602, and the third cylindrical section 603 are arranged in this order from upstream to downstream along the central axis of the main body 60. The outer diameter and inner diameter of the first cylindrical section 601, the second cylindrical section 602, and the third cylindrical section 603 decrease in this order. In particular, the outer diameters of the first cylindrical section 601 and the second cylindrical section 602 are larger than the inner diameter of the upstream receiving opening of the socket 51, and the outer diameter of the third cylindrical section 603 is smaller than the inner diameter of the upstream receiving opening of the socket 51. The inner diameters of the first cylindrical portion 601 and the second cylindrical portion 602 are larger than the outer diameter of the cylindrical portion 441 of the joint portion 44 of the drainage member 4, and the inner diameter of the third cylindrical portion 603 is smaller than the outer diameter of the cylindrical portion 441 of the joint portion 44 of the drainage member 4. Therefore, in the main body portion 60, the first cylindrical portion 601 and the second cylindrical portion 602 together with the fixing device 62 constitute the receiving opening 6a, and the third cylindrical portion 603 constitutes the insertion opening 6b.

[0086] The ring 61 is positioned on the inner circumferential surface of the receiving opening 6a. In this embodiment, the ring 61 is housed in the first cylindrical portion 601 of the main body portion 60. Although the inner diameter of the ring 61 is smaller than the outer diameter of the cylindrical portion 441 of the joint portion 44 of the drainage member 4, the ring 61 can deform to allow it to tightly seal against the cylindrical portion 441 of the joint portion 44 of the drainage member 4 without any gaps. In terms of the mechanical properties of the ring 61, the possible JIS hardness range is 30 to 100, and the tensile strength is (kg / cm 2 The hardness (kg / cm²) is preferably 50-200 and the elongation (%) is preferably 100-800. Possible JIS hardness range, tensile strength (kg / cm²) 2 The elongation and stretch percentage may be determined by the test method specified in JIS K 6301. Examples of materials for ring 61 include styrene-butadiene rubber (SBR) and ethylene-propylene rubber (EPDM).

[0087] The fastener 62 is attached to the first cylindrical portion 601 of the main body 60 to prevent the ring 61 from falling off the main body 60. The fastener 62 comprises an annular flange portion 611 and a side wall portion 612 that protrudes downward from the periphery of the flange portion 611. The flange portion 611 has a circular opening 611a. The outer diameter of the flange portion 611 is larger than the outer diameter of the first cylindrical portion 601, but the inner diameter of the opening 611a is smaller than the inner diameter of the first cylindrical portion 601 and larger than the inner diameter of the second cylindrical portion 602. The ring 61 is sandwiched between the second cylindrical portion 602 and the fastener 62 within the first cylindrical portion 601.

[0088] In the movable member 6, the receiving port 6a has a depth L that allows the drainage member 4 to move relative to the movable member 6 with respect to the central axis of the main body portion 60 of the movable member 6. In this embodiment, the depth L of the receiving port 6a is 40 mm or more and 100 mm or less. Therefore, in this embodiment, the drainage member 4 is connected to the receiving port 6a but is not fixed with adhesive or the like. On the other hand, the insertion port 6b is connected to the receiving port on the upstream side of the socket 51 of the piping portion 5 and is fixed with adhesive or the like.

[0089] Since the movable member 6 has a flexible ring 61, at least a part of it is flexible. Therefore, the movable member 6 allows the drainage member 4 to move relative to the downpipe 50 in a direction intersecting the central axis C50 of the downpipe 50. Furthermore, because the movable member 6 is flexible due to the presence of the ring 61, the watertightness at the receiving opening 6a of the movable member 6 is maintained even when the drainage member 4 moves relative to the downpipe 50 in a direction intersecting the central axis C50 of the downpipe 50.

[0090] Next, the operation of the movable member 6 in the rain gutter system 1 will be explained with reference to Figure 5. Figure 5 is a schematic diagram illustrating the operation of the movable member 6 in the rain gutter system 1.

[0091] In the rain gutter system 1, the eaves gutter 2 is fixed to the roof 10a of the building 10 by a support 3. Due to the thermal expansion and contraction of the roof 10a, displacement of the eaves relative to the building structure occurs. Such displacement can change the position of the eaves of the roof 10a. Such displacement is thought to be proportional to the length of the roof 10a, the coefficient of linear expansion of the roof 10a, and the temperature difference. Therefore, the displacement can be large for large-area roofs, especially roofs with long dimensions in the direction of the slope (for example, a length of 50m or more), or when the roof 10a is a metal roof such as a corrugated metal roof. Figure 5 shows the state in which the eaves of the roof 10a have shifted from position A1 to position A2.

[0092] When the roof 10a shifts in this way, the gutter 2 also shifts along with the roof 10a, which changes the position of the drainage member 4. Figure 5 shows the state in which the drainage member 4 has shifted from position P1 to position P2. On the other hand, in the rain gutter system 1, the downpipe 50 is fixed to the wall surface of the building 10, and unlike the roof 10a, it is hardly affected by thermal expansion and contraction. Therefore, due to the temperature difference, the drainage member 4 tends to move relative to the downpipe 50 in a direction intersecting the central axis C50 of the downpipe 50 (especially in the horizontal direction), which makes it highly likely that stress concentration will occur between the downpipe 50 and the drainage member 4, especially in the rain gutter system 1, and such stress concentration can be one of the causes of damage to the rain gutter system 1.

[0093] However, in the rain gutter system 1, there is a movable member 6 between the drainage member 4 and the upstream end of the downpipe 50. The movable member 6 is at least partially flexible, allowing the drainage member 4 to move relative to the downpipe 50 in a direction intersecting the central axis C50 of the downpipe 50, as shown in Figure 5. This allows the movable member 6 to absorb stress on the drainage member 4 and / or piping section 5A caused by thermal expansion and contraction of the roof 10a, thereby reducing the possibility of damage to the rain gutter system 1 due to stress concentration.

[0094] Thus, because the rain gutter system 1 is equipped with a movable member 6, even if the eaves gutter 2, that is, the drainage member 4, moves in a direction intersecting the central axis C50 of the downpipe 50 due to thermal expansion and contraction of the roof 10a, the movable member 6 can mitigate the stress concentration on the drainage member 4 and / or piping section 5 caused by such movement. Therefore, the possibility of damage to the rain gutter system 1 can be reduced. This enables improved quality and longer lifespan for the building structure 10 and the downpipe 50.

[0095] In the rain gutter system 1, the movable member 6 allows the drainage member 4 to move relative to the downpipe 50 in a direction intersecting the central axis C50 of the downpipe 50. Here, it is preferable that the upper limit of the range in which the movable member 6 can move the drainage member 4 relative to the downpipe 50 in a direction intersecting the central axis C50 of the downpipe 50 is 5 mm or more. In other words, the movable member 6 may be configured so that the drainage member 4 can move at least 5 mm relative to the downpipe 50 in a direction intersecting the central axis C50 of the downpipe 50 (especially in the horizontal direction). In this case, the possibility of damage to the rain gutter system 1 can be further reduced. Of course, the movable member 6 may be configured so that the drainage member 4 can move more than 5 mm relative to the downpipe 50. For example, the upper limit of the range in which the movable member 6 can move the drainage member 4 relative to the downpipe 50 in a direction intersecting the central axis C50 of the downpipe 50 may be 25 mm.

[0096] Furthermore, in the rain gutter system 1, the distance from the roof 10a to the bottom wall 20 of the gutter in the vertical direction is preferably 400 mm or more and 600 mm or less. That is, it is preferable that the support 3 is configured to fix the gutter 2 to the roof 10a so that the distance from the roof 10a to the bottom wall 20 of the gutter 2 in the vertical direction is 400 mm or more and 600 mm or less. For example, the height of the support 3 may be set to 400 mm or more and 600 mm or less. In this case, the support 3 makes it difficult for the effects of thermal expansion and contraction of the roof 10a to be transmitted to the gutter 2 and, consequently, to the drainage member 4, thereby reducing the amount of movement of the drainage member 4 in relation to the amount of movement of the roof 10a. In particular, by providing the support 3 with a pair of arms 31 and 32 located on both sides of the gutter 2, the amount of movement of the drainage member 4 in relation to the amount of movement of the roof 10a can be effectively reduced. In this case, it is preferable that the thickness of at least the arms 31 and 32 of the support 3 is in the range of 1 to 5 mm, particularly about 2 mm. This further reduces the possibility of damage to the rain gutter system 1.

[0097] [1.1.2 Effects, etc.] The rain gutter system 1 described above includes a drainage member 4 positioned on the bottom wall 20 of a gutter 2 fixed to the roof 10a of a building 10 and receiving rainwater from the roof 10a; a downpipe 50 fixed to the wall surface of the building 10; a piping section 5 connected to the drainage member 4; and a movable member 6 located between the drainage member 4 and the upstream end of the downpipe 50, which is at least partially flexible to allow the drainage member 4 to move relative to the downpipe 50 in a direction intersecting the central axis C50 of the downpipe 50. This configuration can reduce the possibility of damage to the rain gutter system 1 while maintaining watertightness.

[0098] In the rain gutter system 1, the upper limit of the range in which the drainage member 4 can move relative to the downpipe 50 in a direction in which the movable member 6 intersects the central axis C50 of the downpipe 50 is 5 mm or more. This configuration further reduces the possibility of damage to the rain gutter system 1 while maintaining watertightness.

[0099] In the rain gutter system 1, the vertical distance from the roof 10a to the bottom wall 20 of the gutter is between 400 mm and 600 mm. This configuration further reduces the possibility of damage to the rain gutter system 1 while maintaining watertightness.

[0100] In the rain gutter system 1, the movable member 6 has a receiving opening 6a facing upstream and an insertion opening 6b facing downstream. The drainage member 4 is not fixed to the receiving opening 6a, and the upstream end of the downpipe 50 is fixed to the insertion opening 6b, with the depth of the receiving opening 6a being between 40 mm and 100 mm. This configuration further reduces the possibility of damage to the rain gutter system 1 while maintaining watertightness.

[0101] In the rain gutter system 1, the movable member 6 includes a flexible ring 61 positioned on the inner circumferential surface of the receiving opening 6a. This configuration further reduces the possibility of damage to the rain gutter system 1 while maintaining watertightness.

[0102] In the rain gutter system 1 described above, the drainage member 4 is positioned at the outlet 20a of the bottom wall 20 of the eaves gutter 2, and the central axis C50 of the downpipe 50 coincides with the central axis C2 of the outlet 20a. This configuration enables improved drainage performance of the rain gutter system 1.

[0103] [1.2 Embodiment 2] [1.2.1 Structure] Figure 6 is a schematic diagram of the rain gutter system 1A according to Embodiment 2. The rain gutter system 1A comprises a gutter 2, a support 3, a drainage member 4, a piping section 5A, and a movable member 6.

[0104] The piping section 5A defines the flow path from the gutter 2 to the drain. The piping section 5A comprises a downpipe 50, a second downpipe 52, a first elbow 53-1, and a second elbow 53-2. The piping section 5A is a piping configuration in which the central axis C2 of the rainwater outlet 20a from the building 10 and the central axis C50 of the downpipe 50 do not coincide. In this piping configuration, the shape of the flow path of the rain gutter system 1A is not straight, but rather bent, particularly crank-shaped or S-shaped. This piping configuration is conventionally also called the elbow-swing type.

[0105] The second downpipe 52 primarily defines a flow path that intersects the vertical direction. The second downpipe 52 is a straight pipe. The cross-section perpendicular to the central axis of the second downpipe 52 is circular. The second downpipe 52 is located between the drainage member 4 and the upstream end of the downpipe 50. The second downpipe 52 is positioned so that the direction of its central axis intersects the vertical direction. Preferably, the second downpipe 52 has a length such that the distance H between the central axis C2 of the outlet 20a and the central axis C50 of the downpipe 50 is 2000 mm or less. The second downpipe 52 may be composed of one or more straight pipes. That is, the second downpipe 52 may be composed of multiple straight pipes connected to each other, rather than a single straight pipe. The straight pipe used in the second downpipe 52 may be the same as that used in the downpipe 50.

[0106] The first elbow 53-1 and the second elbow 53-2 change the direction of the flow path. The first elbow 53-1 and the second elbow 53-2 are connecting joints that connect straight pipes defining flow paths with different directions. The first elbow 53-1 is located between the drain member 4 and the upstream end of the second downpipe 52. The first elbow 53-1 connects the drain member 4 and the upstream end of the second downpipe 52 to each other. The second elbow 53-2 is located between the downstream end of the second downpipe 52 and the upstream end of the downpipe 50. The second elbow 53-2 connects the downstream end of the second downpipe 52 and the upstream end of the downpipe 50 to each other. As an example, the material of the first elbow 53-1 and the second elbow 53-2 is rigid polyvinyl chloride. The dimensions of the first elbow 53-1 and the second elbow 53-2 may be set in accordance with the JIS K 6739 standard for rigid polyvinyl chloride pipe fittings for drainage. Each of the first elbow 53-1 and the second elbow 53-2 is a 45° elbow (so-called 45L) as defined in JIS K 6739. In each of the first elbow 53-1 and the second elbow 53-2, the angle between the central axes of the upstream and downstream sockets is 45°.

[0107] The movable member 6 is located between the drainage member 4 and the upstream end of the downpipe 50. In this embodiment, the drainage member 4 is connected to the receiving port 6a, and the insertion port 6b is connected to the upstream receiving port of the first elbow 53-1 of the piping section 5A. In this way, the movable member 6 is connected between the drainage member 4 and the first elbow 53-1 of the piping section 5A. In this embodiment, the movable member 6 is positioned so that its distance from the drainage member 4 is 1000 mm or less. This makes it easier for the movable member 6 to absorb stress on the drainage member 4 and / or the piping section 5A caused by thermal expansion and contraction of the roof 10a, etc.

[0108] As described above, the rain gutter system 1A is equipped with a movable member 6. Therefore, even if the eaves gutter 2, that is, the drainage member 4, moves in a direction intersecting the central axis C50 of the downpipe 50 due to thermal expansion and contraction of the roof 10a, the movable member 6 can mitigate the stress concentration on the drainage member 4 and / or piping section 5A caused by such movement. This reduces the possibility of damage to the rain gutter system 1A.

[0109] [1.2.2 Effects, etc.] In the rain gutter system 1A described above, the piping section 5A further includes a second downpipe 52 located between the drainage member 4 and the upstream end of the downpipe 50, a first elbow 53-1 located between the upstream end of the second downpipe 52 and the drainage member 4, and a second elbow 53-2 located between the downstream end of the second downpipe 52 and the upstream end of the downpipe 50. The movable member 6 is located between the drainage member 4 and the first elbow 53-1. This configuration can alleviate construction constraints due to the positional relationship between the manhole and the gutter, and enables an improvement in the design flexibility of the rain gutter system 1A.

[0110] In the rain gutter system 1A, the drainage member 4 is positioned at the outlet 20a of the bottom wall 20 of the eaves gutter 2, and the second downpipe 52 has a length such that the distance between the central axis C2 of the outlet 20a and the central axis C50 of the downpipe 50 is 2000 mm or less. This configuration enables improved drainage performance of the rain gutter system 1A.

[0111] In the rain gutter system 1A, the movable member 6 is located between the drainage member 4 and the first elbow 53-1, and its distance from the drainage member 4 is 1000 mm or less. This configuration further reduces the possibility of damage to the rain gutter system 1A while maintaining watertightness.

[0112] In the rain gutter system 1A, the first elbow 53-1 and the second elbow 53-2 are both 45° elbows. This configuration alleviates construction constraints imposed by the positional relationship between the manhole and the gutter, thereby improving the design flexibility of the rain gutter system 1A.

[0113] [1.3 Embodiment 3] [1.3.1 Configuration] Figure 7 is a schematic diagram of the rain gutter system 1B according to Embodiment 3. The rain gutter system 1B comprises a gutter 2, a support 3, a drainage member 4, a piping section 5B, and a movable member 6.

[0114] The piping section 5B defines the flow path from the gutter 2 to the drain. The piping section 5B includes a downpipe 50, a socket 51, a second downpipe 52, a first elbow 53-1, a second elbow 53-2, and a third downpipe 54. The piping section 5B is a piping configuration in which the central axis C2 of the rainwater outlet 20a from the building 10 and the central axis C50 of the downpipe 50 do not coincide.

[0115] The third downpipe 54 mainly defines a vertical flow path. The third downpipe 54 is a straight pipe. The cross-section perpendicular to the central axis of the third downpipe 54 is circular. The third downpipe 54 is located between the drainage member 4 and the first elbow 53-1. The third downpipe 54 is positioned so that the direction of its central axis is aligned with the vertical direction. The length of the third downpipe 54 is preferably 1000 mm or less. The third downpipe 54 may be composed of one or more straight pipes. That is, the third downpipe 54 may be composed of multiple straight pipes connected to each other, rather than a single straight pipe. The straight pipe used in the third downpipe 54 may be the same as that used in the downpipe 50.

[0116] The presence of the third downpipe 54 allows for increased stress concentration in the piping section 5B, thereby distributing the stress. Furthermore, the deformation of the third downpipe 54 itself can also alleviate stress concentration.

[0117] The movable member 6 is located between the drainage member 4 and the upstream end of the downpipe 50. In this embodiment, the drainage member 4 is connected to the receiving port 6a, and the insertion port 6b is connected to the upstream end of the third downpipe 54 via the socket 51. That is, the movable member 6 and the third downpipe 54 are interconnected via the socket 51. In this way, the movable member 6 is connected between the drainage member 4 and the third downpipe 54 of the piping section 5B. Therefore, the movable member 6 is on the same side as the third downpipe 54 relative to the second downpipe 52. In this embodiment, the movable member 6 is positioned such that its distance from the drainage member 4 is 1000 mm or less. This makes it easier for the movable member 6 to absorb stress on the drainage member 4 and / or the piping section 5B caused by thermal expansion and contraction of the roof 10a, etc.

[0118] As described above, the rain gutter system 1B is equipped with a movable member 6. Therefore, even if the eaves gutter 2, that is, the drainage member 4, moves in a direction intersecting the central axis C50 of the downpipe 50 due to thermal expansion and contraction of the roof 10a, the movable member 6 can mitigate the stress concentration on the drainage member 4 and / or piping section 5B caused by such movement. This reduces the possibility of damage to the rain gutter system 1B.

[0119] [1.3.2 Effects, etc.] In the rain gutter system 1B described above, the piping section 5B further includes a third downpipe 54 located between the drainage member 4 and the first elbow 53-1. This configuration further reduces the possibility of damage to the rain gutter system 1B while maintaining watertightness.

[0120] In the rain gutter system 1B, the length of the third downpipe 53 is 1000 mm or less. This configuration further reduces the possibility of damage to the rain gutter system 1B while maintaining watertightness.

[0121] In the gutter system 1B, the movable member 6 is located on the same side as the third downpipe 54 relative to the second downpipe 52. This configuration further reduces the possibility of damage to the gutter system 1B while maintaining watertightness.

[0122] In the rain gutter system 1B, the movable member 6 is located between the drainage member 4 and the first elbow 53-1, and its distance from the drainage member 4 is 1000 mm or less. This configuration further reduces the possibility of damage to the rain gutter system 1B while maintaining watertightness.

[0123] [1.4 Embodiment 4] [1.4.1 Configuration] Figure 8 is a schematic diagram of the rain gutter system 1C according to Embodiment 4. The rain gutter system 1C comprises a gutter 2, a support 3, a drainage member 4, a piping section 5C, and a movable member 6.

[0124] The piping section 5C defines the flow path from the gutter 2 to the drain. The piping section 5C comprises a downpipe 50, a socket 51, a second downpipe 52, a first elbow 53-1, a second elbow 53-2, and a fourth downpipe 55. The piping section 5C is a piping configuration in which the central axis C2 of the rainwater outlet 20a from the building 10 and the central axis C50 of the downpipe 50 do not coincide.

[0125] The fourth downpipe 55 primarily defines a vertical flow path. The fourth downpipe 55 is a straight pipe. The cross-section perpendicular to the central axis of the fourth downpipe 55 is circular. The fourth downpipe 55 is located between the second elbow 53-2 and the socket 51. The fourth downpipe 55 is positioned so that the direction of its central axis is aligned with the vertical direction. The length of the fourth downpipe 55 is preferably 1000 mm or less. The fourth downpipe 55 may be composed of one or more straight pipes. That is, the fourth downpipe 55 may be composed of multiple straight pipes connected to each other, rather than a single straight pipe. The straight pipe used in the fourth downpipe 55 may be the same as that used in downpipe 50.

[0126] The movable member 6 is located between the drainage member 4 and the upstream end of the downpipe 50. In this embodiment, the downstream end of the fourth downpipe 55 is connected to the receiving port 6a, and the insertion port 6b is connected to the upstream end of the downpipe 50 via the socket 51. In this way, the movable member 6 is connected between the second elbow 53-2 and the upstream end of the downpipe 50. In this embodiment, the movable member 6 is positioned so that its distance from the second elbow 53-2 is 1000 mm or less. This makes it easier for the movable member 6 to absorb stress on the drainage member 4 and / or piping section 5C caused by thermal expansion and contraction of the roof 10a, etc.

[0127] As described above, the rain gutter system 1C is equipped with a movable member 6. Therefore, even if the eaves gutter 2, that is, the drainage member 4, moves in a direction intersecting the central axis C50 of the downpipe 50 due to thermal expansion and contraction of the roof 10a, the movable member 6 can mitigate the stress concentration on the drainage member 4 and / or piping section 5C caused by such movement. This reduces the possibility of damage to the rain gutter system 1C.

[0128] [1.4.2 Effects, etc.] In the rain gutter system 1C described above, the piping section 5C further includes a second downpipe 52 located between the drainage member 4 and the upstream end of the downpipe 50, a first elbow 53-1 located between the upstream end of the second downpipe 52 and the drainage member 4, and a second elbow 53-2 located between the downstream end of the second downpipe 52 and the upstream end of the downpipe 50. The movable member 6 is located between the second elbow 53-2 and the upstream end of the downpipe 50. This configuration can alleviate construction constraints due to the positional relationship between the manhole and the gutter, and enables an increase in the design flexibility of the rain gutter system 1C.

[0129] In the rain gutter system 1C, the drainage member 4 is positioned at the outlet 20a of the bottom wall 20 of the eaves gutter 2, and the second downpipe 52 has a length such that the distance between the central axis C2 of the outlet 20a and the central axis C50 of the downpipe 50 is 2000 mm or less. This configuration enables improved drainage performance of the rain gutter system 1C.

[0130] In the rain gutter system 1C, the movable member 6 is located between the second elbow 53-2 and the upstream end of the downpipe 50, with a distance of 1000 mm or less from the second elbow 53-2. This configuration further reduces the possibility of damage to the rain gutter system 1C while maintaining watertightness.

[0131] [1.5 Embodiment 5] [1.5.1 Configuration] Figure 9 is a schematic diagram of the rain gutter system 1D according to Embodiment 5. The rain gutter system 1D comprises a gutter 2, a support 3, a drainage member 4, a piping section 5D, and a movable member 6.

[0132] The piping section 5D defines the flow path from the gutter 2 to the drain. The piping section 5D comprises a downpipe 50, a first socket 51-1, a second socket 51-2, a second downpipe 52, a first elbow 53-1, a second elbow 53-2, a third downpipe 54, and a fourth downpipe 55. The piping section 5D is a piping configuration in which the central axis C2 of the rainwater outlet 20a from the building 10 and the central axis C50 of the downpipe 50 do not coincide.

[0133] The third downpipe 54 is located between the drainage member 4 and the first elbow 53-1.

[0134] The second socket 51-2 is used to connect the drainage member 4 and the third downpipe 54. The upstream end of the third downpipe 54 is connected to the downstream receiving end of the second socket 51-2. The joint portion 44 of the drainage member 4 is connected to the upstream receiving end of the second socket 51-2.

[0135] The fourth downpipe 55 is located between the second elbow 53-2 and the upstream end of the downpipe 50.

[0136] The first socket 51-1 is used to connect the downpipe 50 and the fourth downpipe 55. The upstream end of the downpipe 50 is connected to the downstream receiving end of the first socket 51-1.

[0137] The movable member 6 is located between the drainage member 4 and the upstream end of the downpipe 50. In this embodiment, the downstream end of the fourth downpipe 55 is connected to the receiving port 6a, and the insertion port 6b is connected to the upstream receiving port of the first socket 51-1. In this way, the movable member 6 is connected between the second elbow 53-2 and the upstream end of the downpipe 50. In this embodiment, the movable member 6 is positioned so that its distance from the second elbow 53-2 is 1000 mm or less. This makes it easier for the movable member 6 to absorb stress on the drainage member 4 and / or piping section 5D caused by thermal expansion and contraction of the roof 10a, etc.

[0138] As described above, the rain gutter system 1D is equipped with a movable member 6. Therefore, even if the eaves gutter 2, that is, the drainage member 4, moves in a direction intersecting the central axis C50 of the downpipe 50 due to thermal expansion and contraction of the roof 10a, the movable member 6 can mitigate the stress concentration on the drainage member 4 and / or piping section 5D caused by such movement. This reduces the possibility of damage to the rain gutter system 1D.

[0139] [1.5.2 Effects, etc.] In the rain gutter system 1D described above, the piping section 5D further includes a third downpipe 54 located between the drainage member 4 and the first elbow 53-1. This configuration further reduces the possibility of damage to the rain gutter system 1D while maintaining watertightness.

[0140] In the rain gutter system 1D, the length of the third downpipe 53 is 1000 mm or less. This configuration further reduces the possibility of damage to the rain gutter system 1D while maintaining watertightness.

[0141] In the rain gutter system 1D, the movable member 6 is located on the opposite side of the third downpipe 54 from the second downpipe 52. This configuration further reduces the possibility of damage to the rain gutter system 1D while maintaining watertightness.

[0142] In the rain gutter system 1D, the movable member 6 is located between the second elbow 53-2 and the upstream end of the downpipe 50, with a distance of 1000 mm or less from the second elbow 53-2. This configuration further reduces the possibility of damage to the rain gutter system 1D while maintaining watertightness.

[0143] [1.6 Embodiment 6] [1.6.1 Configuration] Figure 10 is a schematic diagram of the rain gutter system 1E according to Embodiment 6. The rain gutter system 1E comprises a gutter 2, a support 3, a drainage member 4, a piping section 5E, and a movable member 6.

[0144] The piping section 5E comprises a downpipe 50, a second downpipe 52, a first elbow 53E-1, and a second elbow 53E-2. The piping section 5E is a piping configuration in which the central axis C2 of the rainwater outlet 20a from the building 10 and the central axis C50 of the downpipe 50 do not coincide.

[0145] Piping section 5E differs from piping section 5A in that it includes a first elbow 53E-1 and a second elbow 53E-2 instead of the first elbow 53-1 and the second elbow 53-2.

[0146] The first elbow 53E-1 and the second elbow 53E-2 are the same as the first elbow 53-1 and the second elbow 53-2. However, each of the first elbow 53E-1 and the second elbow 53E-2 is a 90° elbow. Examples of 90° elbows include the 90° large bend elbow or 90° elbow specified in JIS K 6739. In each of the first elbow 53E-1 and the second elbow 53E-2, the angle between the central axes of the upstream and downstream sockets may be 91.17°.

[0147] The movable member 6 is located between the drain member 4 and the upstream end of the downpipe 50. In this embodiment, the drain member 4 is connected to the receiving port 6a, and the insertion port 6b is connected to the upstream receiving port of the first elbow 53E-1 of the piping section 5E. In this way, the movable member 6 is connected between the drain member 4 and the first elbow 53E-1 of the piping section 5E. In this embodiment, the movable member 6 is positioned so that its distance from the drain member 4 is 1000 mm or less. This makes it easier for the movable member 6 to absorb stress on the drain member 4 and / or the piping section 5E caused by thermal expansion and contraction of the roof 10a, etc.

[0148] As described above, the rain gutter system 1E is equipped with a movable member 6. Therefore, even if the eaves gutter 2, that is, the drainage member 4, moves in a direction intersecting the central axis C50 of the downpipe 50 due to thermal expansion and contraction of the roof 10a, the movable member 6 can mitigate the stress concentration on the drainage member 4 and / or piping section 5E caused by such movement. This reduces the possibility of damage to the rain gutter system 1E.

[0149] [1.6.2 Effects, etc.] In the rain gutter system 1E described above, the piping section 5E further includes a second downpipe 52 located between the drainage member 4 and the upstream end of the downpipe 50, a first elbow 53E-1 located between the upstream end of the second downpipe 52 and the drainage member 4, and a second elbow 53E-2 located between the downstream end of the second downpipe 52 and the upstream end of the downpipe 50. The movable member 6 is located between the drainage member 4 and the first elbow 53E-1. This configuration can alleviate construction constraints due to the positional relationship between the manhole and the gutter, and enables an improvement in the design flexibility of the rain gutter system 1E.

[0150] In the rain gutter system 1E, the drainage member 4 is positioned at the outlet 20a of the bottom wall 20 of the eaves gutter 2, and the second downpipe 52 has a length such that the distance between the central axis C2 of the outlet 20a and the central axis C50 of the downpipe 50 is 2000 mm or less. This configuration enables improved drainage performance of the rain gutter system 1E.

[0151] In the rain gutter system 1E, the movable member 6 is located between the drainage member 4 and the first elbow 53E-1, and its distance from the drainage member 4 is 1000 mm or less. This configuration further reduces the possibility of damage to the rain gutter system 1E while maintaining watertightness.

[0152] In the rain gutter system 1E, the first elbow 53E-1 and the second elbow 53E-2 are both 90° elbows. This configuration alleviates construction constraints imposed by the positional relationship between the manhole and the gutter, thereby increasing the design flexibility of the rain gutter system 1E.

[0153] [1.7 Embodiment 7] [1.7.1 Configuration] Figure 11 is a schematic diagram of the rain gutter system 1F according to Embodiment 7. The rain gutter system 1F comprises a gutter 2, a support 3, a drainage member 4, a piping section 5F, and a movable member 6.

[0154] The piping section 5F defines the flow path from the gutter 2 to the manhole. The piping section 5F includes a downpipe 50, a second downpipe 52, a first elbow 53E-1, a second elbow 53E-2, and a third downpipe 54. The piping section 5F is a piping configuration in which the central axis C2 of the rainwater outlet 20a from the building 10 and the central axis C50 of the downpipe 50 do not coincide.

[0155] Piping section 5F differs from piping section 5B in that it is equipped with a first elbow 53E-1 and a second elbow 53E-2 instead of the first elbow 53-1 and the second elbow 53-2.

[0156] The movable member 6 is located between the drainage member 4 and the upstream end of the downpipe 50. In this embodiment, the drainage member 4 is connected to the receiving port 6a, and the insertion port 6b is connected to the upstream end of the third downpipe 54 via the socket 51. That is, the movable member 6 and the third downpipe 54 are interconnected via the socket 51. In this way, the movable member 6 is connected between the drainage member 4 and the third downpipe 54 of the piping section 5F. Therefore, the movable member 6 is on the same side as the third downpipe 54 relative to the second downpipe 52. In this embodiment, the movable member 6 is positioned so that its distance from the drainage member 4 is 1000 mm or less. This makes it easier for the movable member 6 to absorb stress on the drainage member 4 and / or the piping section 5F caused by thermal expansion and contraction of the roof 10a, etc.

[0157] As described above, the rain gutter system 1F is equipped with a movable member 6. Therefore, even if the eaves gutter 2, that is, the drainage member 4, moves in a direction intersecting the central axis C50 of the downpipe 50 due to thermal expansion and contraction of the roof 10a, the movable member 6 can mitigate the stress concentration on the drainage member 4 and / or piping section 5F caused by such movement. As a result, the possibility of damage to the rain gutter system 1F can be reduced.

[0158] [1.7.2 Effects, etc.] In the rain gutter system 1F described above, the piping section 5F further includes a third downpipe 54 located between the drainage member 4 and the first elbow 53E-1. This configuration further reduces the possibility of damage to the rain gutter system 1F while maintaining watertightness.

[0159] In the first floor of the rain gutter system, the length of the third downpipe 53 is 1000 mm or less. This configuration further reduces the possibility of damage to the first floor of the rain gutter system while maintaining watertightness.

[0160] In the first floor of the rain gutter system, the movable member 6 is located on the same side as the third downpipe 54 relative to the second downpipe 52. This configuration further reduces the possibility of damage to the first floor of the rain gutter system while maintaining watertightness.

[0161] In the first floor of the rain gutter system, the movable member 6 is located between the drainage member 4 and the first elbow 53E-1, with a distance of 1000 mm or less from the drainage member 4. This configuration further reduces the possibility of damage to the first floor of the rain gutter system while maintaining watertightness.

[0162] [1.8 Embodiment 8] [1.8.1 Configuration] Figure 12 is a schematic diagram of the rain gutter system 1G according to Embodiment 8. The rain gutter system 1G comprises a gutter 2, a support 3, a drainage member 4, a piping section 5G, and a movable member 6.

[0163] The piping section 5G defines the flow path from the gutter 2 to the drain. The piping section 5G comprises a downpipe 50, a socket 51, a second downpipe 52, a first elbow 53E-1, a second elbow 53E-2, and a fourth downpipe 55. The piping section 5G is a piping configuration in which the central axis G2 of the rainwater outlet 20a from the building 10 and the central axis G50 of the downpipe 50 do not coincide.

[0164] Piping section 5G differs from piping section 5C in that it includes a first elbow 53E-1 and a second elbow 53E-2 instead of the first elbow 53-1 and the second elbow 53-2.

[0165] The movable member 6 is located between the drainage member 4 and the upstream end of the downpipe 50. In this embodiment, the downstream end of the fourth downpipe 55 is connected to the receiving port 6a, and the insertion port 6b is connected to the upstream end of the downpipe 50 via the socket 51. In this way, the movable member 6 is connected between the second elbow 53E-2 and the upstream end of the downpipe 50. In this embodiment, the movable member 6 is positioned so that its distance from the second elbow 53E-2 is 1000 mm or less. This makes it easier for the movable member 6 to absorb stress on the drainage member 4 and / or piping section 5G caused by thermal expansion and contraction of the roof 10a, etc.

[0166] As described above, the rain gutter system 1G is equipped with a movable member 6. Therefore, even if the eaves gutter 2, that is, the drainage member 4, moves in a direction intersecting the central axis G50 of the downpipe 50 due to thermal expansion and contraction of the roof 10a, the movable member 6 can mitigate the stress concentration on the drainage member 4 and / or piping section 5G caused by such movement. This reduces the possibility of damage to the rain gutter system 1G.

[0167] [1.8.2 Effects, etc.] In the rain gutter system 1G described above, the piping section 5G further includes a second downpipe 52 located between the drainage member 4 and the upstream end of the downpipe 50, a first elbow 53E-1 located between the upstream end of the second downpipe 52 and the drainage member 4, and a second elbow 53E-2 located between the downstream end of the second downpipe 52 and the upstream end of the downpipe 50. The movable member 6 is located between the second elbow 53E-2 and the upstream end of the downpipe 50. This configuration can alleviate construction constraints due to the positional relationship between the manhole and the gutter, and enables an improvement in the design flexibility of the rain gutter system 1G.

[0168] In the rain gutter system 1G, the drainage member 4 is positioned at the outlet 20a of the bottom wall 20 of the eaves gutter 2, and the second downpipe 52 has a length such that the distance between the central axis C2 of the outlet 20a and the central axis C50 of the downpipe 50 is 2000 mm or less. This configuration enables improved drainage performance of the rain gutter system 1G.

[0169] In the rain gutter system 1G, the movable member 6 is located between the second elbow 53E-2 and the upstream end of the downpipe 50, with a distance of 1000 mm or less from the second elbow 53E-2. This configuration further reduces the possibility of damage to the rain gutter system 1G while maintaining watertightness.

[0170] [1.9 Embodiment 9] [1.9.1 Configuration] Figure 13 is a schematic diagram of the rain gutter system 1H according to Embodiment 9. The rain gutter system 1H comprises a gutter 2, a support 3, a drainage member 4, a piping section 5H, and a movable member 6.

[0171] The piping section 5H defines the flow path from the gutter 2 to the drain. The piping section 5H includes a downpipe 50, a first socket 51-1, a second socket 51-2, a second downpipe 52, a first elbow 53E-1, a second elbow 53E-2, a third downpipe 54, and a fourth downpipe 55. The piping section 5H is a piping configuration in which the central axis C2 of the rainwater outlet 20a from the building 10 and the central axis C50 of the downpipe 50 do not coincide.

[0172] Piping section 5H differs from piping section 5D in that it includes a first elbow 53E-1 and a second elbow 53E-2 instead of the first elbow 53-1 and the second elbow 53-2.

[0173] The movable member 6 is located between the drainage member 4 and the upstream end of the downpipe 50. In this embodiment, the downstream end of the fourth downpipe 55 is connected to the receiving port 6a, and the insertion port 6b is connected to the upstream receiving port of the first socket 51-1. In this way, the movable member 6 is connected between the second elbow 53E-2 and the upstream end of the downpipe 50. In this embodiment, the movable member 6 is positioned so that its distance from the second elbow 53E-2 is 1000 mm or less. This makes it easier for the movable member 6 to absorb stress on the drainage member 4 and / or piping section 5H caused by thermal expansion and contraction of the roof 10a, etc.

[0174] As described above, the rain gutter system 1H is equipped with a movable member 6. Therefore, even if the eaves gutter 2, that is, the drainage member 4, moves in a direction intersecting the central axis C50 of the downpipe 50 due to thermal expansion and contraction of the roof 10a, the movable member 6 can mitigate the stress concentration on the drainage member 4 and / or piping section 5H caused by such movement. This reduces the possibility of damage to the rain gutter system 1H.

[0175] [1.9.2 Effects, etc.] In the rain gutter system 1H described above, the piping section 5H further includes a third downpipe 54 located between the drainage member 4 and the first elbow 53E-1. This configuration further reduces the possibility of damage to the rain gutter system 1H while maintaining watertightness.

[0176] In the rain gutter system 1H, the length of the third downpipe 53 is 1000 mm or less. This configuration further reduces the possibility of damage to the rain gutter system 1H while maintaining watertightness.

[0177] In the rain gutter system 1H, the movable member 6 is located on the opposite side of the third downpipe 54 from the second downpipe 52. This configuration further reduces the possibility of damage to the rain gutter system 1H while maintaining watertightness.

[0178] In the rain gutter system 1H, the movable member 6 is located between the second elbow 53E-2 and the upstream end of the downpipe 50, with a distance of 1000 mm or less from the second elbow 53E-2. This configuration further reduces the possibility of damage to the rain gutter system 1H while maintaining watertightness.

[0179] [2. Variant] The embodiments of this disclosure are not limited to those described above. The embodiments can be modified in various ways depending on the design, etc., as long as the objectives of this disclosure can be achieved. The following lists some modifications of the embodiments. The modifications described below can be combined and applied as appropriate.

[0180] In the following, even if the reference numerals used in Embodiment 1 are applicable to any of Embodiments 1 to 9, this is simply for the purpose of simplifying the description and is not intended to exclude their application to Embodiments 2 to 9.

[0181] In one modified example, the configuration of the movable member is not limited to the movable member 6 described above.

[0182] Figure 14 is a cross-sectional view of one side of the movable member 7 according to one modified example. In the embodiments 1 to 9 described above, the movable member 7 can be used in place of the movable member 6.

[0183] The movable member 7 has a receiving port 7a facing upstream and an insertion port 7b facing downstream. In Embodiment 1, the drainage member 4 is connected to the receiving port 7a, and the insertion port 7b is connected to the upstream receiving port of the socket 51 of the piping section 5. In this way, the movable member 7 is connected between the drainage member 4 and the socket 51 of the piping section 5.

[0184] As shown in Figure 14, the movable member 7 comprises a main body portion 70 and a ring 71.

[0185] The main body 70 is tubular in shape. The cross-section perpendicular to the central axis of the main body 70 is circular. The main body 70 includes a first cylindrical section 701, a second cylindrical section 702, and a third cylindrical section 703. The first cylindrical section 701, the second cylindrical section 702, and the third cylindrical section 703 are arranged in this order from upstream to downstream along the central axis of the main body 70. The outer diameter and inner diameter of the first cylindrical section 701, the second cylindrical section 702, and the third cylindrical section 703 decrease in this order. In particular, the outer diameters of the first cylindrical section 701 and the second cylindrical section 702 are larger than the inner diameter of the upstream receiving opening of the socket 51, and the outer diameter of the third cylindrical section 703 is smaller than the inner diameter of the upstream receiving opening of the socket 51. The inner diameters of the first cylindrical portion 701 and the second cylindrical portion 702 are larger than the outer diameter of the cylindrical portion 441 of the joint portion 44 of the drainage member 4, and the inner diameter of the third cylindrical portion 703 is smaller than the outer diameter of the cylindrical portion 441 of the joint portion 44 of the drainage member 4. Therefore, in the main body portion 70, the first cylindrical portion 701 and the second cylindrical portion 702 constitute the receiving opening 7a, and the third cylindrical portion 703 constitutes the insertion opening 7b.

[0186] The ring 71 is positioned on the inner circumferential surface of the receiving opening 7a. In this embodiment, the ring 71 is housed in the first cylindrical portion 701 of the main body portion 70. The inner diameter of the ring 71 is smaller than the outer diameter of the cylindrical portion 441 of the joint portion 44 of the drainage member 4, but the ring 71 can deform to allow it to tightly seal against the cylindrical portion 441 of the joint portion 44 of the drainage member 4 without any gaps.

[0187] The main body 70 has an annular flange portion 704 that protrudes from the first cylindrical portion 701 to prevent the ring 71 from falling off the main body 70. The flange portion 704 is located at the end of the first cylindrical portion 701 opposite to the second cylindrical portion 702 and has a circular opening 704a. The inner diameter of the opening 704a is smaller than the inner diameter of the first cylindrical portion 701 and greater than or equal to the inner diameter of the second cylindrical portion 702. The ring 71 is sandwiched between the second cylindrical portion 702 and the flange portion 704 within the first cylindrical portion 701.

[0188] In the movable member 7, the receiving port 7a has a depth L that allows the drainage member 4 to move relative to the movable member 7 with respect to the central axis of the main body portion 70 of the movable member 7. For example, the depth L of the receiving port 7a is 40 mm or more and 100 mm or less. Therefore, in the movable member 7, the drainage member 4 is connected to the receiving port 7a but is not fixed with adhesive or the like. On the other hand, the insertion port 7b is connected to the receiving port on the upstream side of the socket 51 of the piping portion 5 and is fixed with adhesive or the like.

[0189] In one modified example, the positions of the rings 61 and 71 in the movable members 6 and 7 are not particularly limited, but it is preferable that they be closer to the upstream end of the main body 60 and 70. That is, it is preferable that the rings 61 and 71 be at the end of the receiving openings 6a and 7a opposite to the insertion openings 6b and 7b.

[0190] In one modified example, instead of having rings 61 and 71, the movable members 6 and 7 may be formed in part or in whole from a flexible material.

[0191] In one modified example, instead of having rings 61 and 71, the movable members 6 and 7 may be formed in part or in whole from a flexible material.

[0192] In one modified example, the drainage member 4 is not limited to the above configuration. The drainage member 4 may be a well-known drain or the like.

[0193] In one modified example, the gutter 2 is not limited to the above configuration. For example, in the gutter 2, the angle of the first side wall 21 or the second side wall 22 with respect to the bottom wall 20 does not have to be a right angle.

[0194] In one modified example, the support member 3 is not limited to the above configuration. For example, the support member 3 does not necessarily have to be shaped to correspond to the gutter 2 in such a way that it contacts the entire bottom wall 20, first side wall 21, and second side wall 22 of the gutter 2, but may be shaped to partially contact the first side wall 21 and second side wall 22 of the gutter 2.

[0195] [3. Appearance] As will be apparent from the above embodiments and modifications, this disclosure includes the following aspects.

[0196] [Aspect 1] A drainage member is positioned on the bottom wall of a gutter that is fixed to the roof of a building and receives rainwater from the roof, The pipe section includes a downpipe fixed to the wall surface of the building and connected to the drainage member, A movable member, at least in part, is provided between the drainage member and the upstream end of the downpipe, and is provided so as to allow the drainage member to move relative to the downpipe in a direction intersecting the central axis of the downpipe. Equipped with, Rain gutter system.

[0197] [Aspect 2] The upper limit of the range in which the drainage member can move relative to the downpipe in a direction intersecting the central axis of the downpipe is 5 mm or more. A rain gutter system according to embodiment 1.

[0198] [Aspect 3] The distance from the roof to the bottom wall of the gutter in the vertical direction is 400 mm or more and 600 mm or less. A rain gutter system according to embodiment 1 or 2.

[0199] [Aspect 4] The movable member has a receiving opening that faces upstream and an insertion opening that faces downstream. The drainage member is not fixed to the receiving opening. The upstream end of the downpipe is fixed to the insertion opening. The depth of the aforementioned receiving opening is 40 mm or more and 100 mm or less. A rain gutter system of any one of the three embodiments 1 to 3.

[0200] [Aspect 5] The movable member comprises a flexible ring positioned on the inner circumferential surface of the receiving opening. A rain gutter system according to embodiment 4.

[0201] [Aspect 6] The drainage member is positioned at the outlet of the bottom wall of the gutter. The central axis of the downpipe coincides with the central axis of the outlet of the gutter. A rain gutter system of any one of the embodiments 1 to 5.

[0202] [Aspect 7] The aforementioned piping section is A second downpipe located between the drainage member and the upstream end of the downpipe, A first elbow located between the upstream end of the second downpipe and the drainage member, A second elbow located between the downstream end of the aforementioned second downpipe and the upstream end of the downpipe, It further includes, The movable member is located between the drainage member and the first elbow, or between the second elbow and the upstream end of the downpipe. A rain gutter system of any one of the embodiments 1 to 5.

[0203] [Aspect 8] The drainage member is positioned at the outlet of the bottom wall of the gutter. The second downpipe has a length such that the distance between the central axis of the downpipe and the central axis of the downpipe is 2000 mm or less. A rain gutter system according to embodiment 7.

[0204] [Aspect 9] The piping section further includes a third downpipe located between the drainage member and the first elbow. A rain gutter system according to embodiment 7 or 8.

[0205] [Aspect 10] The length of the third downpipe is 1000 mm or less. A rain gutter system according to embodiment 9.

[0206] [Aspect 11] The movable member is located on the same side as the third downpipe relative to the second downpipe. A rain gutter system according to embodiment 9 or 10.

[0207] [Aspect 12] The movable member is located on the opposite side of the second downpipe from the third downpipe, A rain gutter system according to embodiment 9 or 10.

[0208] [Aspect 13] The movable member is located between the drainage member and the first elbow, and its distance from the drainage member is 1000 mm or less. A rain gutter system according to any one of embodiments 7 to 11.

[0209] [Aspect 14] The movable member is located between the second elbow and the upstream end of the downpipe, and its distance from the second elbow is 1000 mm or less. A rain gutter system of any one of embodiments 7-10 or 12.

[0210] [Aspect 15] Each of the first elbow and the second elbow is either a 45° elbow or a 90° elbow. A rain gutter system of any one of the embodiments 7 to 14.

[0211] Appearances 2-15 are optional elements and not required. [Industrial applicability]

[0212] This disclosure is applicable to gutter systems. Specifically, this disclosure is applicable to gutter systems for draining water from gutters fixed to the roof of a building. [Explanation of symbols]

[0213] 1. 1A~1H Rain Gutter System 2 eaves gutter 20 Bottom wall 20a Drain outlet 3. Receiving device 4 Drainage member 5, 5A~5H piping section 50 Downpipe 51 Sockets 51-1 First Socket 51-2 Second Socket 52 2nd downpipe 53 3rd downpipe 53-1, 53E-1 First Elbow 53-2, 53E-2 Second Elbow 54 3rd downpipe 55 4th downpipe 6, 7 Movable members 6a, 7a Receptacle 6b, 6b socket 61, 71 rings 10 Buildings 10a Roof

Claims

1. A drainage member is positioned on the bottom wall of a gutter that is fixed to the roof of a building and receives rainwater from the roof, The pipe section includes a downpipe fixed to the wall surface of the building and connected to the drainage member, A movable member, at least in part, is provided between the drainage member and the upstream end of the downpipe, and is provided so as to allow the drainage member to move relative to the downpipe in a direction intersecting the central axis of the downpipe. Equipped with, Rain gutter system.

2. The upper limit of the range in which the drainage member can move relative to the downpipe in a direction in which the movable member intersects the central axis of the downpipe is 5 mm or more. The rain gutter system according to claim 1.

3. The distance from the roof to the bottom wall of the gutter in the vertical direction is 400 mm or more and 600 mm or less. The rain gutter system according to claim 1.

4. The movable member has a receiving opening that faces upstream and an insertion opening that faces downstream. The drainage member is not fixed to the receiving opening. The upstream end of the downpipe is fixed to the insertion opening. The depth of the aforementioned opening is 40 mm or more and 100 mm or less. The rain gutter system according to claim 1.

5. The movable member comprises a flexible ring positioned on the inner circumferential surface of the receiving opening. The rain gutter system according to claim 4.

6. The drainage member is positioned at the outlet of the bottom wall of the gutter. The central axis of the downpipe coincides with the central axis of the outlet of the gutter. The rain gutter system according to claim 1.

7. The aforementioned piping section is A second downpipe located between the drainage member and the upstream end of the downpipe, The first elbow is located between the upstream end of the second downpipe and the drainage member, A second elbow located between the downstream end of the second downpipe and the upstream end of the downpipe, It further includes, The movable member is located between the drainage member and the first elbow, or between the second elbow and the upstream end of the downpipe. The rain gutter system according to claim 1.

8. The drainage member is positioned at the outlet of the bottom wall of the gutter. The second downpipe has a length such that the distance between the central axis of the downpipe and the central axis of the downpipe is 2000 mm or less. The rain gutter system according to claim 7.

9. The piping section further includes a third downpipe located between the drainage member and the first elbow. The rain gutter system according to claim 7.

10. The length of the third downpipe is 1000 mm or less. The rain gutter system according to claim 9.

11. The movable member is located on the same side as the third downpipe relative to the second downpipe. The rain gutter system according to claim 9.

12. The movable member is located on the opposite side of the second downpipe from the third downpipe, The rain gutter system according to claim 9.

13. The movable member is located between the drainage member and the first elbow, and its distance from the drainage member is 1000 mm or less. The rain gutter system according to claim 7.

14. The movable member is located between the second elbow and the upstream end of the downpipe, and its distance from the second elbow is 1000 mm or less. The rain gutter system according to claim 7.

15. Each of the first elbow and the second elbow is either a 45° elbow or a 90° elbow. The rain gutter system according to claim 7.

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