Piping components and piping structures

Abstract

To provide a piping member and piping structure that enable reduction of adverse effects caused by foreign matter adhering to the outer surface of a vertical gutter section.SOLUTION: A piping member 6 constitutes a part of a piping structure 1. The piping structure 1 comprises: a first eave gutter 31; a second eave gutter 32 below the first eave gutter 31; and a vertical gutter section 4 that extends downward from the drop port 31b of the first eave gutter 31 and passes through an opening 32c in the bottom wall 32a of the second eave gutter 32 in a state that is separated from the second eave gutter 32 in flow path. The piping member 6 is attached to the vertical gutter section 4 between the first eave gutter 31 and the second eave gutter 32. The piping member 6 comprises a cylindrical guiding section 61 that increases in size from the first eave gutter 31 to the second eave gutter 32.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a piping member and a piping structure.

Background Art

[0002] Patent Document 1 discloses a piping structure. The piping structure disclosed in Patent Document 1 includes a drainage member that generates a siphon phenomenon, an eaves gutter located below the drainage member and having a through-hole provided at the bottom, a through-member fixed to the eaves gutter and disposed in the through-hole to penetrate the bottom, and a vertical pipe connected to the drainage member and passing through the through-member to penetrate the bottom. The vertical pipe includes a first vertical pipe extending downward from the drainage member, and a second vertical pipe extending downward from the eaves gutter, having a larger diameter than the first vertical pipe, and having the lower end of the first vertical pipe disposed therein. The first vertical pipe or the second vertical pipe is disposed in the through-member and penetrates the bottom.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the piping structure of Patent Document 1, for example, when foreign matter adheres to the outer surface of the first vertical pipe, the foreign matter may fall downward along the outer surface of the first vertical pipe and enter the inside of the second vertical pipe or the through-member. In such a case, there is a possibility of adverse effects such as clogging due to the foreign matter.

[0005] The present disclosure provides a piping member and a piping structure that can reduce the adverse effects caused by foreign matter adhering to the outer surface of the vertical pipe portion.

Means for Solving the Problems

[0006] A piping member according to one aspect of this disclosure constitutes part of a piping structure. The piping structure includes a first gutter, a second gutter located below the first gutter, and a downpipe section extending downward from the outlet of the first gutter and passing through an opening in the bottom wall of the second gutter while being flow-flow separated from the second gutter. The piping member is attached to the downpipe section between the first gutter and the second gutter. The piping member includes a cylindrical guide section whose size increases from the first gutter toward the second gutter.

[0007] A piping structure according to one aspect of the present disclosure comprises the above-described piping member, a first gutter, a second gutter, and a downpipe section. The downpipe section includes a first downpipe extending downward from the outlet of the first gutter and a second downpipe extending downward from the opening of the second gutter. The second downpipe is positioned below the first downpipe and spaced apart from it. The piping member is attached to the first downpipe so as not to come into contact with the second gutter.

[0008] A piping structure according to one aspect of the present disclosure comprises the above-described piping member, a first gutter, a second gutter, and a downpipe section. The downpipe section includes a downpipe that extends downward from the outlet of the first gutter and penetrates the opening of the second gutter. The piping member is attached to the downpipe between the first gutter and the second gutter. [Effects of the Invention]

[0009] Aspects of this disclosure enable the reduction of adverse effects caused by foreign matter adhering to the outer surface of the downpipe. [Brief explanation of the drawing]

[0010] [Figure 1] Schematic diagram of an example of a piping structure according to Embodiment 1 [Figure 2] Cross-sectional view of a portion of the piping structure in Figure 1. [Figure 3] Perspective view of the piping members of the piping structure in Figure 1. [Figure 4] Cross-sectional view of the piping member in Figure 3. [Figure 5] Schematic diagram of an example of a piping structure according to Embodiment 2 [Figure 6] Cross-sectional view of a portion of the piping structure in Figure 5. [Figure 7] Schematic diagram of an example of a piping structure according to Embodiment 3 [Figure 8] Cross-sectional view of a portion of the piping structure in Figure 7. [Figure 9] Cross-sectional view of an example of the piping member configuration according to Modification Example 1 [Figure 10] Cross-sectional view of an example of the piping member configuration according to modified example 2. [Figure 11] Bottom view of an example of the piping member configuration according to Modification 3 [Modes for carrying out the invention]

[0011] The embodiments will be described in detail below, with reference to the drawings as appropriate. However, unnecessary details may be omitted. For example, detailed explanations of already well-known matters or redundant explanations of substantially identical configurations may be omitted. This is to avoid the following explanation becoming unnecessarily verbose and to facilitate understanding by those skilled in the art. The inventors provide the accompanying drawings and the following explanation so that those skilled in the art can fully understand this disclosure, and do not intend to limit the subject matter described in the claims by means of these.

[0012] Unless otherwise specified, the positional relationships, such as up, down, left, and right, shall be based on the positional relationships shown in the drawings. The figures described in the following embodiments are schematic diagrams, and the ratios of the size and thickness of each component in each figure do not necessarily reflect the actual dimensional ratios. Furthermore, the dimensional ratios of each element are not limited to those shown in the drawings.

[0013] [1. Embodiments] [1.1 Embodiment 1] [1.1.1 Configuration] FIG. 1 is a schematic view of a configurational example of a piping structure 1 according to the present embodiment. The piping structure 1 constitutes, for example, a rain gutter system (drainage system) for a building having a plurality of roofs. The rain gutter system receives rainwater from a plurality of roofs of the building and flows it to a sump 21 on the ground 20. The rainwater collected in the sump 21 flows out from the sump 21 through an embedded pipe 22 into a rainwater pipe. The building 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 building such as a detached house, an apartment building, or each dwelling unit of a detached house or an apartment building. The non-residential facilities also include a theater, a cinema, a hall, a game arcade, a complex facility, a department store, a hotel, a ryokan, a kindergarten, a library, a museum, an art museum, an underground shopping street, a station, and an airport, etc. The building may include a plurality of roofs, eaves (small roofs), and a large roof of the building.

[0014] The piping structure 1 in FIG. 1 includes a first eaves gutter 31, a second eaves gutter 32, a vertical gutter portion 4, a branch pipe 5, a piping member 6, a through pipe 7, and drains 81, 82. In the piping structure 1 in FIG. 1, the vertical gutter portion 4 is also referred to as a main pipe in relation to the branch pipe 5.

[0015] The first eaves gutter 31 receives, for example, rainwater from the large roof of the building. The first eaves gutter 31 is installed under the large roof of the building. The first eaves gutter 31 has a long barrel shape. The first eaves gutter 31 in FIG. 1 has a bottom wall 31a, and there is a drain hole 31b in the bottom wall 31a. The vertical gutter portion 4 is connected to the drain hole 31b. In FIG. 1, a drain 81 is arranged at the drain hole 31b of the first eaves gutter 31.

[0016] The drain 81 is, for example, a drain for promoting the siphon phenomenon. The drain 81 reduces the generation of vortices and the entrainment of air at the drain hole 31b. The drain 81 has a structure that is more likely to promote the siphon phenomenon compared to the case where there is no drain 81. The vertical gutter portion 4 is connected to the drain 81. It is a well-known fact that the drain 81 contributes to the promotion of the siphon phenomenon, but the promotion of the siphon phenomenon may also be related not only to the drain 81 but also to the structure of the vertical gutter portion 4.

[0017] The second gutter 32 receives rainwater, for example, from the eaves of a building. The second gutter 32 is installed under the eaves of a building. The second gutter 32 is long and barrel-shaped. The second gutter 32 in Figure 1 has a bottom wall 32a, and the bottom wall 32a has a drain opening 32b. The drain opening 32b is connected to a branch pipe 5. In Figure 1, a drain 82 is located at the drain opening 32b of the second gutter 32.

[0018] Drain 82 is, for example, a drain designed to promote the siphon effect. Drain 82 reduces the generation of vortices and the entrainment of air at the outlet 32b. Drain 82 has a structure that makes it easier to promote the siphon effect compared to when there is no drain 82. While drain 82 contributes to promoting the siphon effect, it is a well known fact that the structure of the branch pipe 5, not just drain 82, can also be involved in promoting the siphon effect. Note that, unlike outlet 31b, drain 82 does not necessarily have to be placed at the outlet 32b of the second gutter 32. Alternatively, a drain with a structure that is generally considered not to contribute to promoting the siphon effect may be placed at outlet 32b.

[0019] In this embodiment, the second gutter 32 is located below the first gutter 31. More specifically, the second gutter 32 overlaps with the first gutter 31 in the vertical direction, at least in part. The second gutter 32 has an opening 32c in the portion that overlaps with the downspout 31b of the first gutter 31 in the vertical direction. The opening 32c is a through hole that penetrates the bottom wall 32a of the second gutter 32. A through pipe 7 is placed in the opening 32c.

[0020] Figure 2 is a cross-sectional view of a portion of the piping structure 1 in Figure 1.

[0021] The through-pipe 7 in Figure 2 is positioned to penetrate the opening 32c in the bottom wall 32a of the second gutter 32. The through-pipe 7 covers the entire circumference of the opening 32c and is attached to the edge of the opening 32c in the bottom wall 32a of the second gutter 32. The through-pipe 7 in Figure 2 has a vertical wall portion 7a and a connecting portion 7b. The vertical wall portion 7a extends upward from the bottom wall 32a of the second gutter 32. The vertical wall portion 7a reduces the possibility of rainwater in the second gutter 32 leaking to the outside through the opening 32c. The connecting portion 7b extends downward from the bottom wall 32a of the second gutter 32. The connecting portion 7b is used to connect to the downpipe portion 4. In this embodiment, the vertical wall portion 7a and the connecting portion 7b of the through-pipe 7 are straight pipes. The cross-sections of the vertical wall section 7a and the connecting section 7b, perpendicular to the pipe axis of the through-pipe 7, are circular.

[0022] The downpipe section 4 in Figure 1 is installed to drain rainwater from the outlet 31b of the first gutter 31 via a siphon effect. The downpipe section 4 directs the rainwater from the outlet 31b vertically. The upstream end of the downpipe section 4 is connected to the outlet 31b. The downstream end of the downpipe section 4 is inserted into the manhole section 21. In Figure 1, a drain pipe cover 40 is positioned to prevent rainwater from flowing into the manhole section 21 through the gap between the downpipe section 4 and the manhole section 21.

[0023] In this embodiment, the downpipe section 4 extends downward from the outlet 31b of the first gutter 31. The downpipe section 4 passes through the opening 32c of the bottom wall 32a of the second gutter 32 while being flow-flow separated from the second gutter 32. Here, "the downpipe section 4 passes through the opening 32c of the bottom wall 32a of the second gutter 32 while being flow-flow separated from the second gutter 32" means that the downpipe section 4 passes through the opening 32c of the bottom wall 32a of the second gutter 32 in such a way that no fluid flows from the second gutter 32 into the downpipe section 4.

[0024] The downpipe section 4 in Figure 1 comprises a first downpipe 41 and a second downpipe 42.

[0025] The first downpipe 41 extends downward from the outlet 31b of the first gutter 31. The first downpipe 41 has an upstream end 41a and a downstream end 41b. The upstream end 41a is the end of the first downpipe 41 that is connected to the outlet 31b (the upper end in Figure 1). In this embodiment, the upstream end 41a of the first downpipe 41 is connected to the drain 81 and then to the outlet 31b of the first gutter 31. In this embodiment, the downstream end 41b is located above the second downpipe 42. In Figure 2, the downstream end 41b is located above the through pipe 7. In particular, in Figure 2, the downstream end 41b is located above the second gutter 32.

[0026] The first downpipe 41 is the portion of the downpipe section 4 upstream of the second gutter 32. The first downpipe 41 is a straight pipe. The cross-section of the first downpipe 41 perpendicular to its pipe axis is circular. The material of the first downpipe 41 is, for example, rigid polyvinyl chloride. The dimensions of the first downpipe 41, for example, its outer diameter and thickness, may be set in accordance with the JIS K 6741 "Rigid Polyvinyl Chloride Pipe" standard for rigid polyvinyl chloride pipes (general). As an example, the first downpipe 41 may be a VU or VP rigid polyvinyl chloride pipe with a nominal diameter of 65 or more, or a pipe with a nominal diameter of 75, 100, or 125, according to the JIS K 6741 "Rigid Polyvinyl Chloride Pipe" standard for rigid polyvinyl chloride pipes (general). In this embodiment, the diameter (inner and outer diameter) of the first downpipe 41 is smaller than that of the through pipe 7.

[0027] The first downpipe 41 is fixed to the wall surface of the building so that the direction of the pipe axis (central axis) of the first downpipe 41 coincides with the vertical direction. The upstream end 41a of the first downpipe 41 is the upstream end of the downpipe section 4.

[0028] The second downpipe 42 extends downward from the opening 32c of the second gutter 32. The second downpipe 42 has an upstream end 42a and a downstream end 42b. The upstream end 42a is located below the downstream end 41b of the first downpipe 41. The upstream end 42a is flow-flow-connected to the downstream end 41b of the first downpipe 41. In other words, the upstream end 42a faces the downstream end 41b of the first downpipe 41 in the vertical direction. In this embodiment, the upstream end 42a is the end of the second downpipe 42 that is connected to the connection part 7b of the through pipe 7 (the upper end in Figure 1). The downstream end 42b is the end of the second downpipe 42 that is inserted into the manhole 21 (the lower end in Figure 1). The downstream end 42b of the second downpipe 42 is the downstream end of the downpipe section 4.

[0029] In this embodiment, the second downpipe 42 is positioned below the first downpipe 41 and spaced apart from it. That is, in the downpipe section 4, the first downpipe 41 and the second downpipe 42 are not directly connected. However, the first downpipe 41 and the second downpipe 42 are connected in terms of flow path. In Figure 1, the second downpipe 42 is positioned below the first downpipe 41 so that rainwater that has passed through the first downpipe 41 flows into the second downpipe 42. In this way, the first downpipe 41 and the second downpipe 42 are positioned to overlap in the vertical direction. In other words, in the vertical direction, the downstream end 41b of the first downpipe 41 and the upstream end 42a of the second downpipe 42 face each other.

[0030] The second downpipe 42 in Figure 1 comprises a first vertical pipe 421, a second vertical pipe 422, and a junction 423.

[0031] The first vertical pipe 421 is the upstream portion of the second downpipe 42. The first vertical pipe 421 is straight. The cross-section of the first vertical pipe 421 perpendicular to its axis is circular. The material of the first vertical pipe 421 is, for example, rigid polyvinyl chloride. The dimensions of the first vertical pipe 421, for example, its outer diameter and thickness, may be set in accordance with the JIS K 6741 "Rigid Polyvinyl Chloride Pipe" standard for rigid polyvinyl chloride pipes (general). As an example, the first vertical pipe 421 may be a VU or VP rigid polyvinyl chloride pipe with a nominal diameter of 65 or more, or a pipe with a nominal diameter of 75, 100, or 125, according to the JIS K 6741 "Rigid Polyvinyl Chloride Pipe" standard for rigid polyvinyl chloride pipes (general). In this embodiment, the diameter (inner and outer diameter) of the first vertical pipe 421 is larger than that of the first downpipe 41. If the first downpipe 41 is a pipe with a nominal diameter of 75, then the first vertical pipe 421 may be a pipe with a nominal diameter of 100, which is one size larger.

[0032] The first vertical pipe 421 is fixed to the building wall so that the direction of the pipe axis of the first vertical pipe 421 coincides with the vertical direction. The upper end of the first vertical pipe 421 is the upstream end 42a of the second downpipe 42. In this embodiment, the diameter (inner and outer diameter) of the first vertical pipe 421 is larger than that of the through pipe 7. Therefore, as shown in Figure 2, the connection portion 7b of the through pipe 7 is located inside the first vertical pipe 421.

[0033] The second vertical pipe 422 is the downstream portion of the second downpipe 42. The second vertical pipe 422 is straight. The cross-section of the second vertical pipe 422 perpendicular to its axis is circular. The material of the second vertical pipe 422 is, for example, rigid polyvinyl chloride. The dimensions of the second vertical pipe 422, for example, its outer diameter and thickness, may be set in accordance with the JIS K 6741 "Rigid Polyvinyl Chloride Pipe" standard for rigid polyvinyl chloride pipes (general). As an example, the second vertical pipe 422 may be a VU or VP rigid polyvinyl chloride pipe with a nominal diameter of 65 or more, or a pipe with a nominal diameter of 75, 100, or 125, according to the JIS K 6741 "Rigid Polyvinyl Chloride Pipe" standard for rigid polyvinyl chloride pipes (general). In this embodiment, the diameter (inner and outer diameter) of the second vertical pipe 422 is larger than that of the first downpipe 41. If the first downpipe 41 is a pipe with a nominal diameter of 75, the second downpipe 422 may be a pipe with a nominal diameter of 100, which is one size larger.

[0034] The second vertical pipe 422 is fixed to the building wall so that the direction of the pipe axis of the second vertical pipe 422 coincides with the vertical direction. The lower end of the second vertical pipe 422 is the downstream end 4b of the second downpipe 42.

[0035] The junction 423 connects the branch pipe 5 to the middle section of the second downpipe 42. In the second downpipe 42 of Figure 1, the junction 423 is located between the first vertical pipe 421 and the second vertical pipe 422. The junction 423 includes a first receiving port 423a connected to the lower end of the first vertical pipe 421, a second receiving port 423b connected to the upper end of the second vertical pipe 422, and a branching port 423c. The junction 423 in Figure 1 is T-shaped. The junction 423 is a so-called T-pipe (cheese pipe). The material of the junction 423 is, for example, rigid polyvinyl chloride. The dimensions of the junction 423 may be set in accordance with the "Rigid polyvinyl chloride fittings (VU fittings) for outdoor drainage equipment" of the Japan Polyvinyl Chloride Pipe and Fittings Association standards.

[0036] In the second downpipe 42 shown in Figure 1, the diameter (inner and outer diameter) of the first vertical pipe 421 is equal to the diameter (inner and outer diameter) of the second vertical pipe 422. In other words, pipe material corresponding to the same nominal diameter can be used for both the first vertical pipe 421 and the second vertical pipe 422.

[0037] The branch pipe 5 in Figure 1 is installed to allow rainwater from the outlet 32b of the second gutter 32 to flow into the downpipe section 4 from the confluence section 423. The branch pipe 5 carries rainwater from the outlet 32b of the second gutter 32 through the downpipe section 4 to the manhole section 21. The branch pipe 5 has an upstream end 5a and a downstream end 5b. The upstream end 5a is the end of the branch pipe 5 that is connected to the outlet 32b (the upper end in Figure 1). The downstream end 5b is the end of the branch pipe 5 that is connected to the confluence section 423 (the left end in Figure 1).

[0038] The branch pipe 5 in Figure 1 comprises a vertical pipe 51, a horizontal pipe 52, and an elbow 53.

[0039] The vertical pipe 51 is the upstream portion of the branch pipe 5. The vertical pipe 51 is straight. The cross-section of the vertical pipe 51 perpendicular to its axis is circular. The material of the vertical pipe 51 is rigid polyvinyl chloride. The dimensions of the vertical pipe 51, for example, its 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 Pipe". The vertical pipe 51 is positioned so that the direction of its axis coincides with the vertical direction. The upstream end 5a of the branch pipe 5 is the upper end of the vertical pipe 51.

[0040] The horizontal pipe 52 is the downstream portion of the branch pipe 5. The horizontal pipe 52 is straight. The cross-section of the horizontal pipe 52 perpendicular to its axis is circular. The material of the horizontal pipe 52 is rigid polyvinyl chloride. The dimensions of the horizontal pipe 52, for example, its outer diameter and thickness, may be set in accordance with the JIS K 6741 "Rigid Polyvinyl Chloride Pipe" standard for rigid polyvinyl chloride pipes (general). The horizontal pipe 52 is positioned so that the direction of its axis coincides with the horizontal direction. The first end of the horizontal pipe 52 (right end in Figure 1) is connected to the vertical pipe 51 via an elbow 53, and the second end of the horizontal pipe 52 (left end in Figure 1) is connected to the downpipe section 4. The downstream end 5b of the branch pipe 5 is the second end of the horizontal pipe 52.

[0041] The elbow 53 is a component for connecting the vertical pipe 51 and the horizontal pipe 52. The elbow 53 has a first socket 53a connected to the lower end of the vertical pipe 51 and a second socket 53b connected to the first end of the horizontal pipe 52. The elbow 53 in Figure 1 is L-shaped. The material of the elbow 53 is, for example, rigid polyvinyl chloride. The dimensions of the elbow 53 may be set in accordance with the JIS K 6739 standard "Rigid polyvinyl chloride pipe fittings for drainage". For example, the elbow 53 in Figure 1 is a 90° bend elbow (so-called DL) as defined in JIS K 6739.

[0042] The piping member 6 in Figure 1 is attached to the downpipe section 4 between the first gutter 31 and the second gutter 32. Figure 3 is a perspective view of the piping member 6. Figure 4 is a cross-sectional view of the piping member 6.

[0043] The piping member 6 comprises a guide portion 61 and a mounting portion 62. In this embodiment, the guide portion 61 and the mounting portion 62 are formed as a continuous, integral unit. The material of the piping member 6 is, for example, rigid polyvinyl chloride.

[0044] The mounting portion 62 is the part for attaching the piping member 6 to the downpipe portion 4. In Figure 3, the mounting portion 62 is cylindrical in shape, into which the downpipe portion 4 fits. In this embodiment, the mounting portion 62 is cylindrical. The opening 62a of the mounting portion 62 is sized to accommodate the first downpipe 41 of the downpipe portion 4.

[0045] The guide section 61 is cylindrical in shape, increasing in size from the upstream end to the downstream end. The upstream end of the guide section 61 is the end on the first gutter 31 side. The downstream end of the guide section 61 is the end on the second gutter 32 side. In other words, the guide section 61 is cylindrical in shape, increasing in size from the first gutter 31 to the second gutter 32.

[0046] In this embodiment, the guide portion 61 is hollow and frustum-shaped. A frustum is a shape obtained by removing a similarly scaled-down cone that shares a vertex with the cone from a cone. In this embodiment, the guide portion 61 is hollow and frustum-shaped. The outer and inner circumferential shapes of the guide portion 61 in a plane perpendicular to the central axis C1 of the piping member 6 are circular. The outer and inner circumferential shapes of the guide portion 61 in a plane perpendicular to the central axis C1 of the piping member 6 increase from the upstream end to the downstream end of the piping member 6. In this embodiment, the guide portion 61 extends from the mounting portion 62. In particular, the guide portion 61 extends from the lower end of the mounting portion 62.

[0047] The piping member 6 described above is attached to the downpipe section 4 between the first gutter 31 and the second gutter 32 such that the central axis C1 of the piping member 6 coincides with the pipe axis of the downpipe section 4. As shown in Figure 2, the piping member 6 is attached to the downstream end 41b of the first downpipe 41. In Figure 2, the piping member 6 is attached to the first downpipe 41 so as not to come into contact with the through pipe 7. In Figure 2, the downstream end 41b of the first downpipe 41 is located within the guide portion 61 of the piping member 6.

[0048] Next, the dimensions of the piping member 6 will be described with reference to Figure 4. In Figure 4, D1 is the dimension of the opening 61a at the lower end of the guide section 61. In this embodiment, since the inner circumference of the guide section 61 is circular, D1 is the inner diameter of the opening 61a. In this embodiment, D1 is larger than the inner diameter of the mounting section 62 (represented by D2 in Figure 4). In particular, D1 is preferably 1.1 times or more and 3.0 times or less than or equal to D2. In addition, D1 is preferably larger than the outer diameter of the through pipe 7. Here, the outer diameter of the through pipe 7 may be the outer diameter of the vertical wall portion 7a of the through pipe 7. In this embodiment, D2 is set to be slightly larger than the outer diameter of the first downpipe 41 so that the first downpipe 41 fits inside the mounting section 62. In Figure 4, H1 is the length of the guide section 61 in the direction of the central axis C1 of the piping member 6. In this embodiment, H1 is 20 mm or more and 300 mm or less. In Figure 4, H2 is the length of the mounting portion 62 in the direction of the central axis C1 of the piping member 6. A larger H2 results in a more stable fit between the mounting portion 62 and the first downpipe 41. If H2 is too large, it becomes difficult to attach the piping member 6 to the first downpipe 41, and the material cost of the piping member 6 may increase. In this embodiment, H2 is not particularly limited, but it is preferable that it is a dimension that ensures a stable fit between the mounting portion 62 and the first downpipe 41.

[0049] In the piping structure 1 described above, foreign matter may adhere to the outer surface of the downpipe section 4. Examples of foreign matter include fallen leaves, garbage, and sewage. In particular, foreign matter adhering to the outer surface of the first downpipe 41 of the downpipe section 4 may move downward along the outer surface of the first downpipe 41 due to gravity. In the piping structure 1, there is a through pipe 7 below the first downpipe 41, and the piping structure 1 is equipped with a piping member 6. The piping member 6 guides the foreign matter moving downward along the outer surface of the first downpipe 41 into the flow path of the second gutter 32 by the guide part 61 (especially the outer surface of the guide part 61). Therefore, the piping member 6 makes it possible to reduce the possibility of foreign matter adhering to the outer surface of the downpipe section 4 (first downpipe 41) entering the through pipe 7. In other words, the piping member 6 makes it possible to reduce the possibility of adverse effects (for example, blockage of the through pipe 7) occurring due to foreign matter entering the through pipe 7. In this way, the piping member 6 makes it possible to reduce the adverse effects caused by foreign matter adhering to the outer surface of the downpipe section 4 (first downpipe 41).

[0050] In piping structure 1, the first downpipe 41 is not directly connected to the penetration pipe 7, but is located above the penetration pipe 7. Therefore, piping structure 1 can be constructed without inserting the first downpipe 41 into the penetration pipe 7. Also, because the first downpipe 41 is not inserted into the penetration pipe 7, even if the first downpipe 41 moves horizontally, it is less likely to hit the penetration pipe 7. Therefore, the possibility of damage to the penetration pipe 7 due to impact caused by the horizontal movement of the first downpipe 41 is reduced.

[0051] In piping structure 1, the first downpipe 41 is not directly connected to the penetration pipe 7, so rainwater flowing out of the first downpipe 41 falls into the penetration pipe 7 due to gravity. However, when rainwater flows out of the first downpipe 41, it may splash around the first downpipe 41. However, in piping structure 1, the piping member 6 can guide the rainwater flowing out of the first downpipe 41 into the penetration pipe 7 by the guide section 61 (particularly the inner surface of the guide section 61). This reduces the possibility that rainwater flowing out of the first downpipe 41 will flow into the second gutter 32 instead of the penetration pipe 7.

[0052] [1.1.2 Effects, etc.] The piping member 6 described above constitutes a part of the piping structure 1. The piping structure 1 includes a first gutter 31, a second gutter 32 located below the first gutter 31, and a downpipe section 4 that extends downward from the outlet 31b of the first gutter 31 and passes through the opening 32c in the bottom wall 32a of the second gutter 32, while being flow-flow separated from the second gutter 32. The piping member 6 is attached to the downpipe section 4 between the first gutter 31 and the second gutter 32. The piping member 6 includes a cylindrical guide section 61 that increases in size from the first gutter 31 towards the second gutter 32. This configuration makes it possible to reduce the adverse effects of foreign matter adhering to the outer surface of the downpipe section 4.

[0053] In Embodiment 1, the piping member 6 further includes a cylindrical mounting portion 62 into which the downpipe portion 4 fits. The guide portion 61 extends from the mounting portion 62. This configuration facilitates the work of attaching the piping member 6 to the downpipe portion 4.

[0054] In Embodiment 1, the length H1 of the guide portion 61 in the direction of the central axis C1 of the piping member 6 is 20 mm or more and 300 mm or less. This configuration makes it possible to reduce the adverse effects of foreign matter adhering to the outer surface of the downpipe portion 4.

[0055] In Embodiment 1, the downpipe section 4 includes a first downpipe 41 extending downward from the outlet of the first gutter 31, and a second downpipe 42 extending downward from the opening of the second gutter 32. The second downpipe 42 is positioned below the first downpipe 41 and spaced apart from it. The piping member 6 is attached to the first downpipe 41 so as not to come into contact with the second downpipe 42. This configuration makes it easier to attach the piping member 6 to the downpipe section 4 because the first downpipe 41 and the second downpipe 42 are not connected.

[0056] In Embodiment 1, the piping structure 1 further includes a through pipe 7 that penetrates the opening 32c of the second gutter 32. The upstream end 42a of the second downpipe 42 is connected to the through pipe 7. The first downpipe 41 is positioned above the through pipe 7 and spaced apart from it. The piping member 6 is attached to the first downpipe 41 so as not to come into contact with the through pipe 7. This configuration can reduce the possibility of damage to the through pipe 7 due to impacts caused by the horizontal movement of the first downpipe 41.

[0057] The piping structure 1 described above comprises a piping member 6, a first gutter 31, a second gutter 32, and a downpipe section 4. The downpipe section 4 includes a first downpipe 41 extending downward from the outlet 31b of the first gutter 31, and a second downpipe 42 extending downward from the opening 32c of the second gutter 32. The second downpipe 42 is positioned below the first downpipe 41 and spaced apart from it. The piping member 6 is attached to the first downpipe 41 so as not to come into contact with the second downpipe 42. This configuration reduces the adverse effects of foreign matter adhering to the outer surface of the downpipe section 4. This configuration facilitates the installation of the piping member 6 to the downpipe section 4 because the first downpipe 41 and the second downpipe 42 are not connected.

[0058] In Embodiment 1, the piping structure 1 further includes a drain 81 located at the outlet 31b of the first gutter 31, and a branch pipe 5 connected to the outlet 32b of the second gutter 32. The second downpipe 42 is located below the second gutter 32 and includes a junction 423 connected to the branch pipe 5. This configuration makes it possible to use the downpipe section 4 for drainage from both the first gutter 31 and the second gutter 32.

[0059] [1.2 Embodiment 2] [1.2.1 Structure] Figure 5 is a schematic diagram of an example of the configuration of the piping structure 1A according to Embodiment 2. Figure 6 is a cross-sectional view of a part of the piping structure 1A in Figure 5.

[0060] The piping structure 1A in Figure 5 comprises a first gutter 31, a second gutter 32, a downpipe section 4A, branch pipes 5, piping members 6, a through pipe 7, and drains 81 and 82. In the piping structure 1A of Figure 5, the downpipe section 4A is also called the main pipe in relation to the branch pipes 5.

[0061] The downpipe section 4A in Figure 5 comprises a first downpipe 41A and a second downpipe 42A.

[0062] The first downpipe 41A is a downpipe in the downpipe section 4A that extends downward from the outlet 31b of the first gutter 31 and penetrates the opening 32c of the second gutter 32. As shown in Figure 6, the first downpipe 41A passes through the inside of the penetrating pipe 7 and penetrates the opening 32c of the second gutter 32. Therefore, in this embodiment, the downstream end 41b of the first downpipe 41A is located below the bottom wall 32a of the second gutter 32.

[0063] The second downpipe 42B in Figure 5 comprises a first vertical pipe 421, a second vertical pipe 422, a junction 423, and a connecting joint 424. The connecting joint 424 connects the first downpipe 41A and the first vertical pipe 421. In this embodiment, the diameter (inner and outer diameter) of the first downpipe 41A is smaller than the diameter (inner and outer diameter) of the first vertical pipe 421. The upstream end of the connecting joint 424 has a shape corresponding to the diameter (inner and outer diameter) of the first downpipe 41A. The downstream end of the connecting joint 424 has a shape corresponding to the diameter (inner and outer diameter) of the first vertical pipe 421. The connecting joint 424 is, for example, a component (such as an increaser) that connects pipes of different diameters. In this embodiment, the upstream end of the connecting joint 424 is the upstream end 42a of the second downpipe 42A.

[0064] The piping member 6 in Figure 6 is attached to the downpipe section 4A between the first gutter 31 and the second gutter 32. More specifically, the piping member 6 is attached to the downpipe section 4A between the first gutter 31 and the second gutter 32 such that the central axis C1 of the piping member 6 coincides with the pipe axis of the downpipe section 4A. As shown in Figure 6, the piping member 6 is attached to the first downpipe 41A above the second gutter 32. In Figure 6, the piping member 6 is attached to the first downpipe 41A so as not to come into contact with the through pipe 7.

[0065] Next, the dimensions of the piping member 6 will be described with reference to Figure 4. In this embodiment, D1 is larger than the inner diameter D2 of the mounting portion 62. In particular, D1 is preferably 1.1 times or more and 3.0 times or less of D2. In addition, D1 is preferably larger than the outer diameter of the through pipe 7. Here, the outer diameter of the through pipe 7 may be the outer diameter of the vertical wall portion 7a. In this embodiment, H1 is 20 mm or more and 300 mm or less. In this embodiment, H2 is not particularly limited, but it is preferably a dimension that ensures a stable fit between the mounting portion 62 and the first downpipe 41A.

[0066] In the piping structure 1A described above, foreign matter may adhere to the outer surface of the downpipe section 4A. Examples of foreign matter include fallen leaves, garbage, and sewage. In particular, foreign matter adhering to the outer surface of the first downpipe 41A of the downpipe section 4A may move downward along the outer surface of the first downpipe 41A due to gravity. The piping structure 1A includes a piping member 6. The piping member 6 guides the foreign matter moving downward along the outer surface of the first downpipe 41A to the flow path of the second gutter 32 by the guide part 61 (especially the outer surface of the guide part 61). Therefore, the piping member 6 makes it possible to reduce the possibility that foreign matter adhering to the outer surface of the downpipe section 4A (first downpipe 41A) will travel along the outer surface of the downpipe section 4A and reach below the second gutter 32. In other words, the piping member 6 makes it possible to reduce the possibility of adverse effects (for example, dirt on the downpipe section 4) occurring due to adhesion to the outer surface of the penetrating pipe 7. In particular, the piping member 6 reduces the possibility of foreign matter adhering to the portion of the downpipe section 4A below the second gutter 32. The portion of the downpipe section 4A below the second gutter 32 is more visible to the public than the portion of the downpipe section 4A above the second gutter 32. Therefore, reducing the possibility of foreign matter adhering to the portion of the downpipe section 4A below the second gutter 32 can contribute to maintaining a clean appearance for the piping structure 1A.

[0067] [1.2.2 Effects, etc.] The piping member 6 described above constitutes a part of the piping structure 1A. The piping structure 1A includes a first gutter 31, a second gutter 32 located below the first gutter 31, and a downpipe section 4A that extends downward from the outlet 31b of the first gutter 31 and passes through the opening 32c of the bottom wall 32a of the second gutter 32, while being flow-flow separated from the second gutter 32. The piping member 6 is attached to the downpipe section 4A between the first gutter 31 and the second gutter 32. The piping member 6 includes a cylindrical guide section 61 that increases in size from the first gutter 31 toward the second gutter 32. This configuration makes it possible to reduce the adverse effects of foreign matter adhering to the outer surface of the downpipe section 4A.

[0068] In Embodiment 2, the piping member 6 further includes a cylindrical mounting portion 62 into which the downpipe portion 4A fits. The guide portion 61 extends from the mounting portion 62. This configuration facilitates the work of attaching the piping member 6 to the downpipe portion 4A.

[0069] In Embodiment 2, the length H1 of the guide portion 61 in the direction of the central axis C1 of the piping member 6 is 20 mm or more and 300 mm or less. This configuration makes it possible to reduce the adverse effects of foreign matter adhering to the outer surface of the downpipe portion 4A.

[0070] In Embodiment 2, the downpipe section 4A includes a downpipe (first downpipe 41A) that extends downward from the outlet 31b of the first gutter 31 and penetrates the opening 32c of the second gutter 32. The piping member 6 is attached to the downpipe (first downpipe 41A) between the first gutter 31 and the second gutter 32. This configuration makes it possible to reduce the possibility of foreign matter adhering to the portion of the downpipe section 4A below the second gutter 32.

[0071] In Embodiment 2, the piping structure 1A further includes a through-pipe 7 that penetrates the opening 32c of the second gutter 32. The downpipe (first downpipe 41A) passes through the opening 32c of the second gutter 32 via the inside of the through-pipe 7. The piping member 6 is attached to the downpipe (first downpipe 41A) so as not to come into contact with the through-pipe 7. This configuration makes it possible to reduce the adverse effects of foreign matter adhering to the outer surface of the downpipe section 4A.

[0072] The piping structure 1A described above comprises a piping member 6, a first gutter 31, a second gutter 32, and a downpipe section 4A. The downpipe section 4A includes a downpipe (first downpipe 41A) that extends downward from the outlet 31b of the first gutter 31 and penetrates the opening 32c of the second gutter 32. The piping member 6 is attached to the downpipe (first downpipe 41A) between the first gutter 31 and the second gutter 32. This configuration makes it possible to reduce the adverse effects of foreign matter adhering to the outer surface of the downpipe section 4A.

[0073] In Embodiment 2, the piping structure 1A further includes a drain 81 located at the outlet 31b of the first gutter 31, and a branch pipe 5 connected to the outlet 32b of the second gutter 32. The downpipe section 4A is located below the second gutter 32 and includes a junction section 423 connected to the branch pipe 5. This configuration makes it possible to use the downpipe section 4A for drainage from both the first gutter 31 and the second gutter 32.

[0074] [1.3 Embodiment 3] [1.3.1 Configuration] Figure 7 is a schematic diagram of an example of the configuration of the piping structure 1B according to Embodiment 3. Figure 8 is a cross-sectional view of a part of the piping structure 1B in Figure 7.

[0075] The piping structure 1B in Figure 7 comprises a first gutter 31, a second gutter 32, a downpipe section 4B, a branch pipe 5, a piping member 6, and drains 81 and 82. In the piping structure 1B of Figure 7, the downpipe section 4B is also called the main pipe in relation to the branch pipe 5.

[0076] The downpipe section 4B in Figure 7 comprises a first downpipe 41 and a second downpipe 42B.

[0077] The second downpipe 42B extends downward from the opening 32c of the second gutter 32. In this embodiment, as shown in Figure 8, the second downpipe 42B penetrates the opening 32c of the second gutter 32. The second downpipe 42B has an upstream end 42a and a downstream end 42b. The upstream end 42a is located above the bottom wall 32a of the second gutter 32, but below the downstream end 41b of the first downpipe 41. The upstream end 42a is flow-flow-connected to the downstream end 41b of the first downpipe 41. In other words, the upstream end 42a faces the downstream end 41b of the first downpipe 41 in the vertical direction. The downstream end 42b is the end of the second downpipe 42 that is inserted into the manhole 21 (the lower end in Figure 1). The downstream end 42b of the second downpipe 42 is the downstream end of the downpipe section 4.

[0078] In this embodiment, the second downpipe 42B is positioned below the first downpipe 41 and spaced apart from it. That is, in the downpipe section 4, the first downpipe 41 and the second downpipe 42B are not directly connected. However, the first downpipe 41 and the second downpipe 42B are connected in terms of their flow paths. In Figure 8, the second downpipe 42B is positioned below the first downpipe 41 so that rainwater that has passed through the first downpipe 41 flows into the second downpipe 42B. In this way, the first downpipe 41 and the second downpipe 42B are positioned to overlap in the vertical direction. In other words, in the vertical direction, the downstream end 41b of the first downpipe 41 and the upstream end 42a of the second downpipe 42B face each other.

[0079] The second downpipe 42B in Figure 7 comprises a first vertical pipe 421, a second vertical pipe 422, and a junction 423. In this embodiment, as shown in Figure 8, the first vertical pipe 421 penetrates the opening 32c in the bottom wall 32a of the second gutter 32. In Figure 8, sealing members 91 and 92 are arranged around the opening 32c of the second gutter 32. Sealing member 91 is positioned on the upper surface of the bottom wall 32a of the second gutter 32 so as to surround the opening 32c around its entire circumference. Sealing member 92 is positioned on the lower surface of the bottom wall 32a of the second gutter 32 so as to surround the opening 32c around its entire circumference. The sealing members 91 and 92 reduce the possibility of rainwater inside the second gutter 32 leaking to the outside through the opening 32c.

[0080] In Figure 8, the piping member 6 is attached to the downpipe section 4B between the first gutter 31 and the second gutter 32. More specifically, the piping member 6 is attached to the downpipe section 4B between the first gutter 31 and the second gutter 32 such that the central axis C1 of the piping member 6 coincides with the pipe axis of the downpipe section 4B. As shown in Figure 8, the piping member 6 is attached to the downstream end 41b of the first downpipe 41. In Figure 8, the piping member 6 is attached to the first downpipe 41 so as not to come into contact with the second downpipe 42B. In Figure 8, the downstream end 41b of the first downpipe 41 is located within the guide portion 61 of the piping member 6.

[0081] Next, the dimensions of the piping member 6 will be described with reference to Figure 4. In this embodiment, D1 is larger than the inner diameter D2 of the mounting portion 62. In particular, D1 is preferably 1.1 times or more and 3.0 times or less of D2. In addition, D1 is preferably larger than the outer diameter of the second downpipe 42B. Here, the outer diameter of the second downpipe 42B may be the outer diameter of the first vertical pipe 421. In this embodiment, H1 is 20 mm or more and 300 mm or less. In this embodiment, H2 is not particularly limited, but it is preferably a dimension that ensures a stable fit between the mounting portion 62 and the first downpipe 41.

[0082] In the piping structure 1B described above, foreign matter may adhere to the outer surface of the downpipe section 4B. Examples of foreign matter include fallen leaves, garbage, and sewage. In particular, foreign matter adhering to the outer surface of the first downpipe 41 of the downpipe section 4B may move downward along the outer surface of the first downpipe 41 due to gravity. In the piping structure 1B, there is a second downpipe 42B below the first downpipe 41, and the piping structure 1B is equipped with a piping member 6. The piping member 6 guides the foreign matter moving downward along the outer surface of the first downpipe 41 into the flow path of the second gutter 32 by the guide part 61 (especially the outer surface of the guide part 61). Therefore, the piping member 6 makes it possible to reduce the possibility of foreign matter adhering to the outer surface of the downpipe section 4B (first downpipe 41) entering the second downpipe 42B. In other words, the piping member 6 makes it possible to reduce the possibility of adverse effects (for example, blockage of the second downpipe 42B) occurring due to foreign matter entering the second downpipe 42B. Thus, the piping member 6 makes it possible to reduce adverse effects caused by foreign matter adhering to the outer surface of the downpipe section 4B (first downpipe 41).

[0083] In piping structure 1B, the first downpipe 41 is not directly connected to the second downpipe 42B, but is located above the second downpipe 42B. Therefore, piping structure 1B can be installed without inserting the first downpipe 41 into the second downpipe 42B. Also, because the first downpipe 41 is not inserted into the second downpipe 42B, even if the first downpipe 41 moves horizontally, it is less likely to hit the second downpipe 42B. Therefore, the possibility of damage to the second downpipe 42B due to impact caused by the horizontal movement of the first downpipe 41 is reduced.

[0084] In piping structure 1B, the first downpipe 41 is not directly connected to the second downpipe 42B, so rainwater flowing out of the first downpipe 41 falls into the second downpipe 42B due to gravity. However, when rainwater flows out of the first downpipe 41, it may splash around the first downpipe 41. However, in piping structure 1B, the piping member 6 can guide the rainwater flowing out of the first downpipe 41 into the second downpipe 42B by the guide section 61 (particularly the inner surface of the guide section 61). This reduces the possibility that rainwater flowing out of the first downpipe 41 will flow into the second gutter 32 instead of the second downpipe 42B.

[0085] [1.3.2 Effects, etc.] The piping member 6 described above constitutes a part of the piping structure 1B. The piping structure 1B includes a first gutter 31, a second gutter 32 located below the first gutter 31, and a downpipe section 4B that extends downward from the outlet 31b of the first gutter 31 and passes through the opening 32c of the bottom wall 32a of the second gutter 32, while being flow-flow separated from the second gutter 32. The piping member 6 is attached to the downpipe section 4B between the first gutter 31 and the second gutter 32. The piping member 6 includes a cylindrical guide section 61 that increases in size from the first gutter 31 toward the second gutter 32. This configuration makes it possible to reduce the adverse effects of foreign matter adhering to the outer surface of the downpipe section 4B.

[0086] In Embodiment 3, the piping member 6 further includes a cylindrical mounting portion 62 into which the downpipe portion 4B fits. The guide portion 61 extends from the mounting portion 62. This configuration facilitates the work of attaching the piping member 6 to the downpipe portion 4B.

[0087] In Embodiment 3, the length H1 of the guide portion 61 in the direction of the central axis C1 of the piping member 6 is 20 mm or more and 300 mm or less. This configuration makes it possible to reduce the adverse effects of foreign matter adhering to the outer surface of the downpipe portion 4B.

[0088] In Embodiment 3, the downpipe section 4B includes a first downpipe 41 extending downward from the outlet of the first gutter 31, and a second downpipe 42B extending downward from the opening of the second gutter 32. The second downpipe 42B is positioned below the first downpipe 41 and spaced apart from it. The piping member 6 is attached to the first downpipe 41 so as not to come into contact with the second downpipe 42B. This configuration makes it easier to attach the piping member 6 to the downpipe section 4 because the first downpipe 41 and the second downpipe 42B are not connected.

[0089] In Embodiment 3, the second downpipe 42B penetrates the opening 32c of the second gutter 32. The second downpipe 42B is positioned below the first downpipe 41 and spaced apart from it. The piping member 6 is attached to the first downpipe 41 so as not to come into contact with the second downpipe 42B. This configuration can reduce the possibility of damage to the second downpipe 42B due to impacts caused by the horizontal movement of the first downpipe 41.

[0090] The piping structure 1B described above comprises a piping member 6, a first gutter 31, a second gutter 32, and a downpipe section 4B. The downpipe section 4B includes a first downpipe 41 extending downward from the outlet 31b of the first gutter 31, and a second downpipe 42B extending downward from the opening 32c of the second gutter 32. The second downpipe 42B is positioned below the first downpipe 41 and spaced apart from it. The piping member 6 is attached to the first downpipe 41 so as not to come into contact with the second downpipe 42B. This configuration reduces the adverse effects of foreign matter adhering to the outer surface of the downpipe section 4B. This configuration facilitates the installation of the piping member 6 to the downpipe section 4B because the first downpipe 41 and the second downpipe 42B are not connected.

[0091] In Embodiment 3, the piping structure 1B further includes a drain 81 located at the outlet 31b of the first gutter 31, and a branch pipe 5 connected to the outlet 32b of the second gutter 32. The second downpipe 42B is located below the second gutter 32 and includes a junction 423 connected to the branch pipe 5. This configuration makes it possible to use the downpipe section 4B for drainage from both the first gutter 31 and the second gutter 32.

[0092] [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.

[0093] [2.1 Variation 1] Figure 9 is a cross-sectional view of an example configuration of the piping member 6C according to Modification 1. The piping member 6C can be used in place of the piping member 6 in the piping structures 1, 1A, and 1B of Embodiments 1, 2, and 3, respectively.

[0094] The piping member 6C in Figure 9 comprises a guide portion 61 and a mounting portion 62. In this modified example, the guide portion 61 and the mounting portion 62 are formed as a continuous, integral unit. The material of the piping member 6C is, for example, rigid polyvinyl chloride.

[0095] In Figure 9, the guide portion 61 extends not from the lower end of the mounting portion 62, but from between the upper and lower ends of the mounting portion 62. In other words, the mounting portion 62 extends downward from the upper end of the guide portion 61. In this piping member 6C, the upper end of the guide portion 61 is above the lower end of the mounting portion 62.

[0096] Next, the dimensions of the piping member 6C will be explained with reference to Figure 9.

[0097] In Figure 9, D1 is the dimension of the opening 61a at the lower end of the guide section 61. In this modified example, since the inner circumference of the guide section 61 is circular, D1 is the inner diameter of the opening 61a. In this modified example, D1 is larger than the inner diameter of the mounting section 62 (represented by D2 in Figure 9). In particular, D1 is preferably 1.1 to 3.0 times the size of D2. When the piping member 6C is used in the piping structure 1,1A, D1 is preferably larger than the outer diameter of the through pipe 7. Here, the outer diameter of the through pipe 7 may be the outer diameter of the vertical wall portion 7a of the through pipe 7. When the piping member 6C is used in the piping structure 1B, D1 is preferably larger than the outer diameter of the second downpipe 42B. Here, the outer diameter of the second downpipe 42B may be the outer diameter of the first vertical pipe 421.

[0098] In Figure 9, H1 is the length of the guide portion 61 in the direction of the central axis C1 of the piping member 6C. In this modified example, H1 is between 20 mm and 300 mm.

[0099] In Figure 9, H2 is the length of the mounting portion 62 in the direction of the central axis C1 of the piping member 6C. H21 is the distance from the upper end of the mounting portion 62 to the upper end of the guide portion 61 in the direction of the central axis C1 of the piping member 6C. H22 is the distance from the upper end of the guide portion 61 to the lower end of the mounting portion 62 in the direction of the central axis C1 of the piping member 6C. In other words, H2 = H21 + H22. In this modified example, H22 is greater than 0 and less than or equal to twice H1. This makes it easier to attach the piping member 6C to the downpipe sections (4, 4A, 4B).

[0100] In the piping member 6C described above, the distance H22 from the upper end of the guide portion 61 to the lower end of the mounting portion 62 in the direction of the central axis C1 of the piping member 6C is greater than 0 and less than or equal to twice the length H1 of the guide portion 61 in the direction of the central axis C1 of the piping member 6C. This configuration facilitates the work of attaching the piping member 6C to the downpipe sections (4, 4A, 4B).

[0101] [2.2 Variation 2] Figure 10 is a cross-sectional view of an example configuration of the piping member 6D according to Modification 2. The piping member 6D can be used in place of the piping member 6 in each of the piping structures 1, 1A, and 1B of Embodiments 1, 2, and 3.

[0102] The piping member 6D in Figure 10 comprises a guide portion 61, a mounting portion 62, and an auxiliary portion 63. In this modified example, the guide portion 61, the mounting portion 62, and the auxiliary portion 63 are formed as a continuous, integral unit. The material of the piping member 6D is, for example, rigid polyvinyl chloride.

[0103] The guide portion 61 in Figure 10 extends from the lower end of the mounting portion 62.

[0104] The auxiliary portion 63 extends downward from the inner circumferential surface of the guide portion 61. The auxiliary portion 63 is cylindrical. In this modified example, the auxiliary portion 63 is cylindrical.

[0105] Next, the dimensions of the piping component 6D will be explained with reference to Figure 10.

[0106] In Figure 10, D1 is the dimension of the opening 61a at the lower end of the guide section 61. In this modified example, since the inner circumference of the guide section 61 is circular, D1 is the inner diameter of the opening 61a. In this modified example, D1 is larger than the inner diameter of the mounting section 62 (represented by D2 in Figure 10). In particular, D1 should be between 1.1 and 3.0 times D2. When the piping member 6D is used in the piping structure 1,1A, D1 should be larger than the outer diameter of the through pipe 7. Here, the outer diameter of the through pipe 7 may be the outer diameter of the vertical wall portion 7a of the through pipe 7. When the piping member 6C is used in the piping structure 1B, D1 should be larger than the outer diameter of the second downpipe 42B. Here, the outer diameter of the second downpipe 42B may be the outer diameter of the first vertical pipe 421.

[0107] In Figure 10, D3 is the inner diameter of the auxiliary part 63. When the piping member 6D is used in piping structure 1,1A, D3 is larger than the outer diameter of the through pipe 7 by a predetermined value. The predetermined value is between 2 mm and 30 mm. Here, the outer diameter of the through pipe 7 may be the outer diameter of the vertical wall portion 7a of the through pipe 7. When the piping member 6D is used in piping structure 1B, D3 is larger than the outer diameter of the second downpipe 42B by a predetermined value. The predetermined value is between 2 mm and 30 mm. Here, the outer diameter of the second downpipe 42B may be the outer diameter of the first vertical pipe 421.

[0108] In Figure 10, H1 is the length of the guide portion 61 in the direction of the central axis C1 of the piping member 6D. In this modified example, H1 is between 20 mm and 300 mm.

[0109] In Figure 10, H3 is the length of the auxiliary portion 63 in the direction of the central axis C1 of the piping member 6D. In this modified example, H3 is greater than 0 and less than or equal to twice H1. This makes it easier to attach the piping member 6D to the downpipe sections (4, 4A, 4B).

[0110] The piping member 6D described above further comprises a cylindrical auxiliary portion 63 extending downward from the inner circumferential surface of the guide portion 61.

[0111] When piping member 6D is used in piping structure 1,1A, the inner diameter of auxiliary part 63 is larger than the outer diameter of the penetrating pipe 7 by a predetermined value. The predetermined value is between 2 mm and 30 mm. This configuration reduces the possibility of foreign matter adhering to the outer surface of the downpipe 4 entering the penetrating pipe 7. In piping structure 1, auxiliary part 63 can function to assist the inflow of rainwater from the first downpipe 42 into the penetrating pipe 7.

[0112] When the piping member 6D is used in the piping structure 1B, the inner diameter of the auxiliary part 63 is larger than the outer diameter of the second downpipe 42B by a predetermined value. The predetermined value is between 2 mm and 30 mm. This configuration reduces the possibility of foreign matter adhering to the outer surface of the downpipe 4 entering the second downpipe 42B. In the piping structure 1B, the auxiliary part 63 can perform the function of assisting the inflow of rainwater from the first downpipe 42 to the second downpipe 42B.

[0113] [2.3 Variation 3] Figure 11 is a bottom view of an example configuration of the piping member 6E according to Modification 3. The piping member 6E can be used in place of the piping member 6 in the piping structures 1, 1A, and 1B of Embodiments 1, 2, and 3, respectively.

[0114] The piping member 6E in Figure 11 comprises a guide portion 61E and a mounting portion 62. In this modified example, the guide portion 61E and the mounting portion 62 are formed as a continuous, integral unit. In this modified example, the guide portion 61E extends from the mounting portion 62. In particular, the guide portion 61E extends from the lower end of the mounting portion 62. The material of the piping member 6E is, for example, rigid polyvinyl chloride.

[0115] The guide section 61E is cylindrical in shape, increasing in size from the upstream end to the downstream end. In this modified example, the guide section 61E is hollow and frustoconical. The outer and inner circumferential shapes of the guide section 61E in the plane perpendicular to the central axis C1 of the piping member 6E are elliptical. The outer and inner circumferential shapes of the guide section 61E in the plane perpendicular to the central axis C1 of the piping member 6E increase from the upstream end to the downstream end of the piping member 6E.

[0116] Next, the dimensions of the piping member 6E, particularly the dimensions of the guide portion 61E, will be described with reference to Figure 11. As mentioned above, the inner circumference of the guide portion 61E is elliptical, so the opening 61a at the lower end of the guide portion 61E has different dimensions in a plane perpendicular to the central axis C1 of the piping member 6E. In Figure 11, the opening 61a at the lower end of the guide portion 61E has a first dimension D11 and a second dimension D12. The first dimension D11 is the dimension in a first direction perpendicular to the central axis C1 of the piping member 6E. The second dimension D12 is the dimension in a second direction perpendicular to the central axis C1 of the piping member 6E but different from the first direction. In Figure 11, the first and second directions correspond to the major and minor axis directions of the opening 61a at the lower end of the guide portion 61E, respectively.

[0117] When the piping member 6E is used in the piping structure 1,1A, the first dimension D11 is 1.1 times or more and 3 times or less the inner diameter D2 of the mounting portion 62, and the second dimension D12 is larger than the outer diameter of the through pipe 7. The outer diameter of the through pipe 7 may be the outer diameter of the vertical wall portion 7a of the through pipe 7.

[0118] When the piping member 6E is used in the piping structure 1B, the first dimension D11 is 1.1 to 3 times the inner diameter D2 of the mounting portion 62, and the second dimension D12 is larger than the outer diameter of the second downpipe 42B. The outer diameter of the second downpipe 42B may be the outer diameter of the first vertical pipe 421.

[0119] However, the first and second directions do not necessarily correspond to the major and minor axes of the opening 61a at the lower end of the guide section 61E, respectively. For example, the first and second directions may not necessarily correspond to the minor and major axes of the opening 61a at the lower end of the guide section 61E, respectively. In other words, the relative sizes of the first dimension D11 and the second dimension D12 are not particularly important.

[0120] The piping member 6E described above further comprises a cylindrical mounting portion 62 into which the downpipe sections (4, 4A, 4B) are fitted. The guide portion 61E extends from the mounting portion 62. The opening 61a at the lower end of the guide portion 61E has a first dimension D11 in a first direction perpendicular to the central axis C1 of the piping member 6E, and a second dimension D12 in a second direction perpendicular to the central axis C1 of the piping member 6E but different from the first direction.

[0121] When the piping member 6E is used in the piping structure 1,1A, the first dimension D11 is between 1.1 and 3 times the inner diameter D2 of the mounting portion 62, and the second dimension D12 is larger than the outer diameter of the through-pipe 7. This configuration reduces the possibility of foreign matter adhering to the outer surface of the downpipe 4 entering the through-pipe 7.

[0122] When the piping member 6E is used in the piping structure 1B, the first dimension D11 is 1.1 to 3 times the inner diameter D2 of the mounting portion 62, and the second dimension D12 is larger than the outer diameter of the second downpipe 42B. This configuration makes it possible to reduce the possibility of foreign matter adhering to the outer surface of the downpipe portion 4 entering the second downpipe 42B.

[0123] [2.4 Other variations] Other variations are described below. In the following, even if the reference numerals used in Embodiment 1 are applicable to any of the above embodiments 1 to 3 and variations 1 to 3, this is simply for the purpose of simplifying the description and is not intended to exclude their application to embodiments 2 and 3 and variations 1 to 3.

[0124] In one modified example, the shape and size of the piping member 6 may differ from those of the above embodiment and modified example. For example, unlike the above embodiment, the guide portion 61 of the piping member 6 may be a hollow truncated pyramidal shape. The outer and / or inner circumferential shapes of the guide portion 61 in a plane perpendicular to the central axis C1 of the piping member 6 may be polygonal rather than circular. Therefore, as in Modified Example 3, the opening 61a at the lower end of the guide portion 61 may have a first dimension in a first direction perpendicular to the central axis C1 of the piping member 6, and a second dimension in a second direction perpendicular to the central axis C1 of the piping member 6 but different from the first direction. The first dimension may be 1.1 to 3 times the inner diameter of the mounting portion 62, and the second dimension may be larger than the outer diameter of the through pipe 7 or the outer diameter of the second downpipe 42B. In the above embodiments and modified examples, the outer and inner surfaces of the guide portion 61 are straight in the cross-section of the guide portion 61 in a plane including the central axis C1 of the piping member 6, but in the modified examples, they may be curved or folded.

[0125] In one modified example, the guide portion 61 and the mounting portion 62 of the piping member 6 do not have to be formed as a continuous, integral part. For example, the guide portion 61 and the mounting portion 62 may be mechanically joined by assembly or the like. The materials of the guide portion 61 and the mounting portion 62 may be different. Similarly, the guide portion 61 and the auxiliary portion 63 do not have to be formed as a continuous, integral part. For example, the guide portion 61 and the auxiliary portion 63 may be mechanically joined by assembly or the like. The materials of the guide portion 61 and the auxiliary portion 63 may be different.

[0126] In one modified example, the piping member 6 may be provided integrally with the downpipe section 4. For example, the guide section 61 may be provided integrally with the downpipe section 4. In this case, the mounting section 62 does not need to be used.

[0127] In one modified example, at least one of the materials for the downpipe section 4, the branch pipes 5, the piping members 6, and the through-pipe 7 does not necessarily have to be rigid polyvinyl chloride. The materials for the downpipe section 4, the branch pipes 5, the piping members 6, and the through-pipe 7 may be determined according to the requirements of the piping structure 1, and may be synthetic resins such as polyethylene, or metal instead of synthetic resin.

[0128] In one modified example, the dimensions of the downpipe section 4 and the branch pipes 5 do not necessarily have to be set in accordance with the provisions of JIS K 6741.

[0129] In one modified example, the piping structure 1 does not necessarily have to include the first gutter 31. For example, if the building has a structure that includes a drain opening such as a balcony, the downpipe section 4 may be connected to the drain opening of the building.

[0130] In one modified example, the piping structure 1 does not necessarily have to be equipped with a second gutter 32. For example, if the building has a structure that includes a drain outlet such as a balcony, the branch pipe 5 may be connected to the drain outlet of the building.

[0131] In one modified example, the piping structure 1 may correspond to multiple outlets 32b of the second gutter 32. In the piping structure 1, multiple branch pipes 5 may be connected to one or more junctions 423 of the downpipe section 4.

[0132] In one modified example, the downpipe section 4 may have a different configuration from the embodiment described above. For example, the first downpipe 41 of the downpipe section 4 may be composed of multiple pipe materials instead of a single pipe material. For example, the second downpipe 42 of the downpipe section 4 may have other piping components such as connecting pipes in addition to the first vertical pipe 421, the second vertical pipe 422, and the junction section 423. In the second downpipe 42, the number of first vertical pipes 421, the number of second vertical pipes 422, and the number of junction sections 423 are not particularly limited.

[0133] In one modified example, the branch pipe 5 may have a different configuration from that of the above embodiment. In addition to the vertical pipe 51, horizontal pipe 52, and elbow 53, the branch pipe 5 may have other piping components. The number of vertical pipes 51, horizontal pipes 52, and elbows 53 in the branch pipe 5 is not particularly limited. The elbow 53 is not limited to a 90° bend elbow as defined in JIS K 6739, but may be a 45° elbow.

[0134] In one modified example, the upstream end 42a of the second downpipe 42 may be located inside the through-pipe 7. That is, the second downpipe 42 may pass through the opening 32c in the bottom wall 32a of the second gutter 32 via the through-pipe 7.

[0135] [3. Appearance] As is clear from the above embodiments and modifications, this disclosure includes the following aspects. In the following, reference numerals are enclosed in parentheses solely to indicate their correspondence with the embodiments. Note that, for the sake of readability, the notation of reference numerals enclosed in parentheses may be omitted after the first occurrence.

[0136] The first embodiment is a piping member (6;6C;6D;6E) that constitutes a part of a piping structure (1;1A;1B). The piping structure (1;1A;1B) includes a first gutter (31), a second gutter (32) located below the first gutter (31), and a downpipe section (4;4A;4B) that extends downward from the outlet (31b) of the first gutter (31) and passes through an opening (32c) in the bottom wall (32a) of the second gutter (32) while being flow-flow separated from the second gutter (32). The piping member (6;6C;6D;6E) is attached to the downpipe section (4;4A;4B) between the first gutter (31) and the second gutter (32). The piping members (6; 6C; 6D; 6E) are provided with cylindrical guide sections (61; 61E) whose size increases from the first gutter (31) to the second gutter (32). This configuration makes it possible to reduce the adverse effects of foreign matter adhering to the outer surface of the downpipe sections (4; 4A; 4B).

[0137] The second embodiment is a piping member (6; 6C; 6D; 6E) based on the first embodiment. In this embodiment, the piping member (6; 6C; 6D; 6E) further comprises a cylindrical mounting portion (62) into which the downpipe portion (4; 4A; 4B) is fitted. The guide portion (61; 61E) extends from the mounting portion (62). This embodiment facilitates the work of attaching the piping member (6; 6C; 6D; 6E) to the downpipe portion (4; 4A; 4B).

[0138] A third embodiment is a piping member (6C) based on the second embodiment. In this embodiment, the upper end of the guide portion (61) is above the lower end of the mounting portion (62). The distance (H22) from the upper end of the guide portion (61) to the lower end of the mounting portion (62) in the direction of the central axis (C1) of the piping member (6C) is greater than 0 and less than or equal to twice the length (H1) of the guide portion (61;61E) in the direction of the central axis (C1) of the piping member (6C). This embodiment facilitates the work of attaching the piping members (6;6C;6D;6E) to the downpipe portions (4;4A;4B).

[0139] The fourth embodiment is a piping member (6;6C;6D;6E) based on any one of the first to third embodiments. In this embodiment, the length (H1) of the guide portion (61;61E) in the direction of the central axis (C1) of the piping member (6;6C;6D;6E) is 20 mm or more and 300 mm or less. This embodiment makes it possible to reduce the adverse effects of foreign matter adhering to the outer surface of the downpipe portion (4;4A;4B).

[0140] A fifth embodiment is a piping member (6; 6C; 6D; 6E) based on any one of the first to fourth embodiments. In this embodiment, the downpipe section (4; 4B) includes a first downpipe (41) extending downward from the outlet of the first gutter (31) and a second downpipe (42; 42B) extending downward from the opening of the second gutter (32). The second downpipe (42; 42B) is positioned below the first downpipe (41) and spaced apart from it. The piping member (6; 6C; 6D; 6E) is attached to the first downpipe (41) so as not to contact the second downpipe (42; 42B). In this configuration, since the first downpipe (41) and the second downpipe (42; 42B) are not connected, the work of attaching the piping members (6; 6C; 6D; 6E) to the downpipe section (4; 4B) is made easier.

[0141] A sixth embodiment is a piping member (6; 6C; 6D; 6E) based on the fifth embodiment. In this embodiment, the piping structure (1) further comprises a through pipe (7) that penetrates the opening (32c) of the second gutter (32). The upstream end (42a) of the second downpipe (42) is connected to the through pipe (7). The first downpipe (41) is positioned above the through pipe (7) and spaced apart from it. The piping member (6; 6C; 6D; 6E) is attached to the first downpipe (41) so as not to contact the through pipe (7). This embodiment can reduce the possibility of damage to the through pipe (7) due to impact caused by the horizontal movement of the first downpipe (41).

[0142] The seventh embodiment is a piping member (6E) based on the sixth embodiment. In this embodiment, the piping member (6E) further comprises a cylindrical mounting portion (62) into which the downpipe portion (4) is fitted. The guide portion (61; 61E) extends from the mounting portion (62). The opening (61a) at the lower end of the guide portion (61E) has a first dimension (D11) in a first direction perpendicular to the central axis (C1) of the piping member (6E), and a second dimension (D12) in a second direction perpendicular to the central axis (C1) of the piping member (6E) but different from the first direction. The first dimension (D11) is 1.1 times or more and 3 times or less the inner diameter of the mounting portion (62). The second dimension (D12) is larger than the outer diameter of the through pipe (7). This embodiment makes it possible to reduce the possibility of foreign matter adhering to the outer surface of the downpipe section (4) entering the through pipe (7).

[0143] The eighth embodiment is a piping member (6D) based on the sixth or seventh embodiment. In this embodiment, the piping member (6D) further comprises a cylindrical auxiliary part (63) extending downward from the inner circumferential surface of the guide part (61; 61E). The inner diameter of the auxiliary part (63) is larger than the outer diameter of the through pipe (7) by a predetermined value. The predetermined value is 2 mm or more and 30 mm or less. This embodiment makes it possible to reduce the possibility of foreign matter adhering to the outer surface of the downpipe (4) entering the through pipe (7).

[0144] The ninth embodiment is a piping member (6; 6C; 6D; 6E) based on the fifth embodiment. In this embodiment, the second downpipe (42B) penetrates the opening (32c) of the second gutter (32). The second downpipe (42B) is positioned below the first downpipe (41) and spaced apart from it. The piping member (6; 6C; 6D; 6E) is attached to the first downpipe (41) so as not to come into contact with the second downpipe (42B). This embodiment makes it possible to reduce the possibility of foreign matter adhering to the outer surface of the downpipe section (4B) entering the second downpipe (42B).

[0145] The tenth embodiment is a piping member (6E) based on the ninth embodiment. In this embodiment, the piping member (6; 6C; 6D; 6E) further comprises a cylindrical mounting portion (62) into which the downpipe portion (4B) is fitted. The guide portion (61; 61E) extends from the mounting portion (62). The opening (61a) at the lower end of the guide portion (61; 61E) has a first dimension (D11) in a first direction perpendicular to the central axis (C1) of the piping member (6E), and a second dimension (D12) in a second direction perpendicular to the central axis (C1) of the piping member (6E) but different from the first direction. The first dimension (D11) is 1.1 times or more and 3 times or less the inner diameter of the mounting portion (62). The second dimension (D12) is larger than the outer diameter of the second downpipe (42B). This embodiment makes it possible to reduce the possibility of foreign matter adhering to the outer surface of the downpipe section (4B) entering the second downpipe (42B).

[0146] An eleventh embodiment is a piping member (6D) based on the ninth or tenth embodiment. In this embodiment, the piping member (6D) further comprises a cylindrical auxiliary part (63) extending downward from the inner circumferential surface of the guide part (61; 61E). The inner diameter of the auxiliary part (63) is larger than the outer diameter of the second downpipe (42B) by a predetermined value. The predetermined value is 2 mm or more and 30 mm or less. This embodiment makes it possible to reduce the possibility of foreign matter adhering to the outer surface of the downpipe part (4) entering the second downpipe (42B).

[0147] The twelfth embodiment is a piping member (6; 6C; 6D; 6E) based on any one of the first to fourth embodiments. In this embodiment, the downpipe section (4A) includes a downpipe (first downpipe 41A) that extends downward from the outlet (31b) of the first gutter (31) and penetrates the opening (32c) of the second gutter (32). The piping member (6; 6C; 6D; 6E) is attached to the downpipe (first downpipe 41A) between the first gutter (31) and the second gutter (32). This embodiment makes it possible to reduce the possibility of foreign matter adhering to the portion of the downpipe section (4A) below the second gutter (32).

[0148] The thirteenth embodiment is a piping structure (1; 1B) comprising a piping member (6; 6C; 6D; 6E) described in any one of the first to eleventh embodiments, the first gutter (31), the second gutter (32), and the downpipe section (4; 4B). The downpipe section (4; 4B) includes a first downpipe (41) extending downward from the outlet (31b) of the first gutter (31), and a second downpipe (42; 42B) extending downward from the opening (32c) of the second gutter (32). The second downpipe (42; 42B) is positioned below the first downpipe (41) and spaced apart from it. The piping members (6; 6C; 6D; 6E) are attached to the first downpipe (41) so as not to come into contact with the second downpipe (42; 42B). This configuration reduces the adverse effects of foreign matter adhering to the outer surface of the downpipe section (4; 4A; 4B). This configuration also facilitates the installation of the piping members (6; 6C; 6D; 6E) to the downpipe section (4; 4B) because the first downpipe (41) and the second downpipe (42; 42B) are not connected.

[0149] A fourteenth embodiment is a piping structure (1;1B) based on the thirteenth embodiment. In this embodiment, the piping structure (1;1B) further comprises a drain (81) located at the outlet (31b) of the first gutter (31) and a branch pipe (5) connected to the outlet (32b) of the second gutter (32). The second downpipe (42;42B) is located below the second gutter (32) and includes a junction (423) connected to the branch pipe (5). This embodiment makes it possible to use the downpipe section (4;4B) for drainage from the first gutter (31) and drainage from the second gutter (32).

[0150] The 15th embodiment is a piping structure (1A) comprising a piping member (6; 6C; 6D; 6E) described in any one of the 1st to 11th embodiments, the first gutter (31), the second gutter (32), and the downpipe section (4A). The downpipe section (4A) includes a downpipe (first downpipe 41A) that extends downward from the outlet (31b) of the first gutter (31) and penetrates the opening (32c) of the second gutter (32). The piping member (6; 6C; 6D; 6E) is attached to the downpipe (first downpipe 41A) between the first gutter (31) and the second gutter (32). This embodiment makes it possible to reduce the adverse effects of foreign matter adhering to the outer surface of the downpipe section (4A). This embodiment makes it possible to reduce the possibility of foreign matter adhering to the portion of the downpipe section (4A) below the second gutter (32).

[0151] The second to eleventh and fourteenth aspects described above are optional elements. [Industrial applicability]

[0152] This disclosure is applicable to piping members and piping structures. Specifically, this disclosure is applicable to a piping structure comprising a first gutter and a second gutter located below the first gutter, and to piping members that constitute a part of said piping structure. [Explanation of Symbols]

[0153] 1,1A,1B Piping Structure 31. First gutter 31b Drop-off 32. Second gutter 32a bottom wall 32b Drop-off 32c aperture 4,4A,4B Vertical gutter section 41,41A 1st downpipe 42,42A,42B 2nd downpipe 42a Upstream end 5 branch pipes 6, 6C, 6D, 6E Piping components 61,61E Guidance section 61a aperture 62 Mounting part 63 Auxiliary part 7 Penetration pipe 81 Drain

Claims

1. A piping member that constitutes part of a piping structure, The aforementioned piping structure is The first gutter and, The second gutter located below the first gutter, A downpipe section extending downward from the outlet of the first gutter and passing through an opening in the bottom wall of the second gutter, while being separated from the second gutter in terms of flow path, Equipped with, The aforementioned piping member is attached to the downpipe section between the first gutter and the second gutter. The aforementioned piping member includes a cylindrical guide section whose size increases from the first gutter to the second gutter. Piping components.

2. The downpipe section is further provided with a cylindrical mounting section into which it fits inside, The guide portion extends from the mounting portion, The piping member according to claim 1.

3. The upper end of the guide portion is above the lower end of the mounting portion. The distance from the upper end of the guide portion to the lower end of the mounting portion in the direction of the central axis of the piping member is greater than 0 and less than or equal to twice the length of the guide portion in the direction of the central axis of the piping member. The piping member according to claim 2.

4. The length of the guide portion in the direction of the central axis of the piping member is 20 mm or more and 300 mm or less. The piping member according to claim 1.

5. The aforementioned downpipe section is, A first downpipe extending downward from the outlet of the first gutter, A second downpipe extends downward from the opening of the second gutter, Includes, The second downpipe is positioned below the first downpipe and spaced apart from it. The piping member is attached to the first downpipe so as not to come into contact with the second downpipe. A piping member according to any one of claims 1 to 4.

6. The aforementioned piping structure further comprises a through pipe that penetrates the opening of the second gutter, The upstream end of the second downpipe is connected to the through pipe. The first downpipe is positioned above the through pipe and spaced apart from the through pipe, The piping member is attached to the first downpipe so as not to come into contact with the through-pipe. The piping member according to claim 5.

7. The device further comprises a cylindrical mounting portion having an opening into which the downpipe portion is fitted, The guide portion extends from the mounting portion, The opening at the lower end of the guide portion is The first dimension in a first direction perpendicular to the central axis of the piping member, The second dimension in a second direction that is perpendicular to the central axis of the piping member but different from the first direction, It has, The first dimension is 1.1 times or more and 3 times or less the inner diameter of the mounting portion. The second dimension is larger than the outer diameter of the through pipe. The piping member according to claim 6.

8. The guide portion further comprises a cylindrical auxiliary portion extending downward from the inner circumferential surface of the guide portion, The inner diameter of the auxiliary portion is larger than the outer diameter of the through pipe by a predetermined value. The predetermined value is 2 mm or more and 30 mm or less. The piping member according to claim 6.

9. The second downpipe penetrates the opening of the second gutter, The second downpipe is positioned below the first downpipe and spaced apart from it. The piping member is attached to the first downpipe so as not to come into contact with the second downpipe. The piping member according to claim 5.

10. The device further comprises a cylindrical mounting portion having an opening into which the downpipe portion is fitted, The guide portion extends from the mounting portion, The opening at the lower end of the guide portion is The first dimension in a first direction perpendicular to the central axis of the piping member, The second dimension in a second direction that is perpendicular to the central axis of the piping member but different from the first direction, It has, The first dimension is 1.1 times or more and 3 times or less the inner diameter of the mounting portion. The second dimension is larger than the outer diameter of the second downpipe. The piping member according to claim 9.

11. The guide portion further comprises a cylindrical auxiliary portion extending downward from the inner circumferential surface of the guide portion, The inner diameter of the auxiliary part is larger than the outer diameter of the second downpipe by a predetermined value. The predetermined value is 2 mm or more and 30 mm or less. The piping member according to claim 9.

12. The downpipe section includes a downpipe that extends downward from the outlet of the first gutter and penetrates the opening of the second gutter. The aforementioned piping member is attached to the downpipe between the first gutter and the second gutter. A piping member according to any one of claims 1 to 4.

13. A piping member according to any one of claims 1 to 4, The first gutter and, The aforementioned second gutter, The aforementioned downpipe section and, Equipped with, The aforementioned downpipe section is, A first downpipe extending downward from the outlet of the first gutter, A second downpipe extends downward from the opening of the second gutter, Includes, The second downpipe is positioned below the first downpipe and spaced apart from it. The aforementioned piping member is attached to the first downpipe so as not to come into contact with the second gutter. Piping structure.

14. A drain located at the outlet of the first gutter, A branch pipe connected to the outlet of the second gutter, Furthermore, The second downpipe is provided with a junction below the second gutter, which is connected to the branch pipe. The piping structure according to claim 13.

15. A piping member according to any one of claims 1 to 4, The first gutter and, The aforementioned second gutter, The aforementioned downpipe section and, Equipped with, The downpipe section includes a downpipe that extends downward from the outlet of the first gutter and penetrates the opening of the second gutter. The aforementioned piping member is attached to the downpipe between the first gutter and the second gutter. Piping structure.

Images