Piping member

Abstract

To provide a piping member capable of reducing construction errors while improving flow rate and downsizing.SOLUTION: A piping member 10 includes: a joint (second bent pipe 52) that has a first receptacle (receptacle 521), and a second receptacle (receptacle 522) with a different orientation than the first receptacle; a straight pipe 32 that is connected to the receptacle 521 of the second bent pipe 52; and a projection member 6 that is placed at the receptacle 522 side in the straight pipe 32 for partially reducing the cross-sectional area of the straight pipe 32. The second bent pipe 52 and the straight pipe 32 are integrally joined.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present disclosure relates to a piping member. [Background technology]

[0002] Patent Document 1 discloses a siphon gutter system. The siphon gutter system disclosed in Patent Document 1 includes an eaves gutter, a siphon generating section that has a cylindrical section penetrating a water collection port formed on the bottom surface of the eaves gutter and that generates a siphon phenomenon, and an elbow. The elbow is installed downstream of the siphon gutter system. The elbow includes a curved pipe section and receiving ports provided on both ends of the curved pipe section. When viewed in cross section on a plane including the pipe axis of the curved pipe section, the radius of curvature of the inner peripheral surface on the inner periphery side is greater than 64 mm and less than 100 mm. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-120068 Summary of the Invention [Problem to be solved by the invention]

[0004] The technology disclosed in Patent Document 1 is expected to improve the flow rate, but the elbow becomes relatively large.

[0005] The present disclosure provides a piping component that can improve flow rate while enabling miniaturization and reducing installation errors. [Means for solving the problem]

[0006] A piping member according to one embodiment of the present disclosure comprises a fitting having a first receiving port and a second receiving port oriented in a different direction from the first receiving port, a straight pipe connected to the first receiving port of the fitting, and a protrusion member located on the second receiving port side of the straight pipe and partially reducing the flow path cross-sectional area of ​​the straight pipe, wherein the fitting and straight pipe are integrally joined. [Effects of the Invention]

[0007] Aspects of the present disclosure can improve flow rate while enabling miniaturization, and reduce installation errors. [Brief explanation of the drawings]

[0008] [Figure 1] Schematic diagram of a piping system according to a first embodiment [Figure 2] 1 is a cross-sectional view of a first bent pipe of a piping system according to a first embodiment; [Figure 3] 1 is a cross-sectional view of a second bent pipe of the piping system according to the first embodiment; [Figure 4] FIG. 1 is a perspective view of a piping member of a piping system according to a first embodiment; [Figure 5] FIG. 1 is an exploded perspective view of a piping member according to a first embodiment; [Figure 6] 1 is a cross-sectional view of a piping member according to a first embodiment; [Figure 7] Enlarged view of P1 in Figure 6 [Figure 8] Cross section of line AA in Figure 6 [Figure 9] 1 is a partially cutaway cross-sectional view of a piping member according to a first embodiment; [Figure 10] FIG. 1 is a plan view of a piping member according to a first embodiment; [Figure 11] 1 is a bottom view of a piping member according to a first embodiment; [Figure 12] Cross section of Figure 8 along line XX [Figure 13] Cross section of line XI-XI in Figure 8 [Figure 14] Cross section of Figure 8 taken along line XII-XII [Figure 15] Cross section of line XIII-XIII in Figure 8 [Figure 16] FIG. 10 is a view of the protruding member of the piping member according to the first embodiment, viewed from the second surface. [Figure 17] FIG. 1 is a view of a protruding member of a piping member according to a first embodiment, viewed from a first surface. [Figure 18] FIG. 1 is a view of a protruding member of a piping member according to a first embodiment, viewed from a first end. [Figure 19] FIG. 10 is a view of the protruding member of the piping member according to the first embodiment, viewed from the second end. [Figure 20] FIG. 1 is an exploded perspective view of a protrusion member according to a first embodiment; [Figure 21] FIG. 10 is another exploded perspective view of the protrusion member according to the first embodiment; [Figure 22] FIG. 10 is a side view of a first portion of the protrusion member according to the first embodiment; [Figure 23] FIG. 10 is a side view of a second portion of the protrusion member according to the first embodiment; [Figure 24] 1 is a cross-sectional view of a protruding member according to a first embodiment; [Figure 25] 1 is an explanatory diagram of a protrusion member according to a first embodiment attached to a straight pipe; [Figure 26] FIG. 10 is an explanatory diagram of the attachment of a straight pipe to a second bent pipe according to the first embodiment; [Figure 27] 10 is a diagram showing a simulation of pressure distribution in a piping member of a comparative example; [Figure 28] Comparison diagram of the protrusion member according to the first embodiment and the basic shape [Figure 29] Graph showing the change in pressure loss due to the protrusion members according to the embodiment compared to the basic shape [Figure 30] Schematic diagram of a piping system according to a second embodiment [Figure 31] 10 is a cross-sectional view of a piping member according to a second embodiment. [Figure 32] Schematic diagram of a piping system according to a third embodiment [Figure 33] 10 is a cross-sectional view of a piping member according to a third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] [1. Embodiment] Hereinafter, embodiments will be described in detail with reference to the drawings as appropriate. However, more detailed description than necessary may be omitted. For example, detailed description of already well-known matters or redundant description of substantially identical configurations may be omitted. This is to avoid unnecessary redundancy in the following description and to facilitate understanding by those skilled in the art. Note that the inventor(s) provide the accompanying drawings and the following description to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

[0010] Unless otherwise specified, the positional relationships such as up, down, left, and right are based on the positional relationships shown in the drawings. Each drawing described in the following embodiments is a schematic drawing, and the ratios of the size and thickness of each component in each drawing do not necessarily reflect the actual dimensional ratios. Furthermore, the dimensional ratios of each component are not limited to the ratios shown in the drawings.

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

[0012] 1.1 First Embodiment [1.1.1 Configuration] FIG. 1 is a schematic diagram of a piping system 1 according to a first embodiment. The piping system 1 is used to transport a fluid with a Reynolds number of 4000 or greater. A fluid with a Reynolds number of 4000 or greater is considered to be a fluid whose flow within a cylinder becomes turbulent. Examples of such fluids include liquids (drinking water, heat source water, wastewater, oil, etc.), gases (air, steam, etc.), and gas-liquid two-phase flow (a mixture of liquid and gas). In this embodiment, the piping system 1 is used as a drainage system. The piping system 1 is a gutter system that receives rainwater from the roof 11a of a building 11 and channels it to a manhole 21 on the ground 20. The piping system 1 forms a rainwater flow path. The rainwater collected in the manhole 21 flows from the manhole 21 through an underground pipe 22 and into a storm sewer. The building 11 may be, for example, a non-residential facility such as a store, office, factory, building, school, welfare facility, or hospital, or a residential facility such as a detached house, an apartment building, or each dwelling unit of a detached house or apartment building. Non-residential facilities also include theaters, movie theaters, public halls, amusement parks, complexes, department stores, hotels, inns, kindergartens, libraries, museums, art galleries, underground shopping malls, stations, and airports.

[0013] The piping system 1 includes an eaves gutter 2, a vertical pipe 3, a horizontal pipe 4, a first bent pipe 51, a second bent pipe 52, a protruding member 6, and a drain 7.

[0014] The eaves gutter 2 collects rainwater from the roof 11a of the building 11. The eaves gutter 2 is installed under the roof 11a of the building 11. As an example, the eaves gutter 2 is arranged at the eaves edge of the roof 11a. In particular, the eaves gutter 2 is arranged so as to extend along the eaves edge of the roof 11a. The eaves gutter 2 is shaped like a long bucket. The eaves gutter 2 has a bottom wall 2a. An inlet 2b is formed in the bottom wall 2a depending on the overall design of the piping system 1. The inlet 2b is, for example, a circular opening. In a rain gutter system, the inlet 2b is also referred to as a water collection inlet, a drain outlet, or a drop outlet. As an example, the eaves gutter 2 may be formed by extrusion molding of a resin material. The eaves gutter 2 may include a core material to reinforce the overall strength of the eaves gutter 2. The core material may be made of, for example, metal. As another example, the eaves gutter 2 may be formed from a metal plate, for example, a steel plate (also called a coil).

[0015] The drain 7 is disposed at the inlet 2b of the eaves gutter 2. The drain 7 reduces the generation of vortices and the entrainment of air at the inlet 2b. The drain 7 may contribute to the generation of the siphoning phenomenon. The drain 7 may have a known configuration.

[0016] In the piping system 1, the vertical pipe 3 is not directly connected to the inlet 2b, but is connected to the inlet 2b via the horizontal pipe 4, the first bent pipe 51, and the second bent pipe 52.

[0017] The standpipe 3 defines a vertical flow path. The standpipe 3 is fixed to the wall 11b of the building 11. In a gutter system, the standpipe 3 is also called a downspout. The standpipe 3 is installed to drain rainwater from the inlet 2b. The standpipe 3 allows rainwater from the inlet 2b to flow vertically. The standpipe 3 is straight. A cross section perpendicular to the central axis C3 of the standpipe 3 is circular. The standpipe 3 is arranged so that the direction of the central axis C3 of the standpipe 3 coincides with the up-down direction (vertical direction). The standpipe 3 has an upstream end 3a and a downstream end 3b. The upstream end 3a is the end of the standpipe 3 that is connected to the inlet 2b (the upper end in FIG. 1). The downstream end 3b is the end of the standpipe 3 that is inserted into the manhole 21 (the lower end in FIG. 1). In FIG. 1, a pipe cover 34 is arranged to prevent rainwater from flowing into the manhole 21 through a gap between the upright pipe 3 and the manhole 21.

[0018] The vertical pipe 3 is composed of multiple pipe materials. The vertical pipe 3 includes straight pipes 31 and 32 and a connecting joint 33 that connects the straight pipes 31 and 32 together. The straight pipe 31 is the downstream portion of the vertical pipe 3, and the straight pipe 32 is the upstream portion of the vertical pipe 3. In this embodiment, the straight pipe 31 is longer than the straight pipe 32. A first end (upper end in FIG. 1 ) of the straight pipe 32 defines the upstream end 3a of the vertical pipe 3, a second end (lower end in FIG. 1 ) of the straight pipe 32 is connected to the first end (upper end in FIG. 1 ) of the straight pipe 31 via the connecting joint 33, and the second end (lower end in FIG. 1 ) of the straight pipe 31 defines the downstream end 3b of the vertical pipe 3.

[0019] The horizontal pipe 4 defines a flow path that intersects the vertical direction. In a gutter system, the horizontal pipe 4 is also called a call gutter. The horizontal pipe 4 is a part that allows rainwater from the building 11 to flow from the inlet 2b to the standpipe 3. The horizontal pipe 4 is located between the inlet 2b for rainwater from the building 11 and the standpipe 3. The horizontal pipe 4 is a straight pipe. The cross section perpendicular to the central axis C4 of the horizontal pipe 4 is circular. The horizontal pipe 4 is fixed so that the direction of the central axis C4 of the horizontal pipe 4 is inclined relative to the up-down direction (vertical direction). The horizontal pipe 4 has an upstream end 4a and a downstream end 4b. The upstream end 4a is the end of the horizontal pipe 4 that is connected to the inlet 2b (the left end in Figure 1). The downstream end 4b is the end of the horizontal pipe 4 that is connected to the standpipe 3 (the right end in Figure 1).

[0020] As an example, the material of the standpipe 3 and horizontal pipe 4 is rigid polyvinyl chloride. The dimensions of the standpipe 3 and horizontal pipe 4, such as the outer diameter and thickness, may be set in accordance with the standard for rigid polyvinyl chloride pipes (general) in JIS K 6741 "Rigid Polyvinyl Chloride Pipes." The dimensions of the connection fitting 33, such as the outer diameter and thickness, may be set in accordance with the standard for sockets in JIS K 6739 "Rigid Polyvinyl Chloride Pipe Fittings for Drainage."

[0021] Table 1 shows an example of the nominal diameter of VP rigid polyvinyl chloride pipe in the standard for rigid polyvinyl chloride pipe (general) in JIS K 6741 "Rigid Polyvinyl Chloride Pipe." In Table 1, the units for the outer diameter (standard dimension), thickness (minimum dimension), and approximate inner diameter are in mm.

[0022] [Table 1]

[0023] Table 2 shows an example of the nominal diameter of VU rigid polyvinyl chloride pipe in the standard for rigid polyvinyl chloride pipe (general) of JIS K 6741 "Rigid Polyvinyl Chloride Pipe." In Table 2, the units of outer diameter (standard dimension), thickness (minimum dimension), and approximate inner diameter are in mm.

[0024] [Table 2]

[0025] The first bent pipe 51 and the second bent pipe 52 are bent pipes that change the direction of the flow path. The first bent pipe 51 and the second bent pipe 52 are connection joints that connect flow paths that have different directions, such as a vertical pipe and a horizontal pipe.

[0026] 2 is a cross-sectional view of the first bent pipe 51. The first bent pipe 51 has a curved pipe portion (bent portion) 510 and sockets 511 and 512. The curved pipe portion 510 and the sockets 511 and 512 are formed as a continuous, integrated unit. The material of the first bent pipe 51, i.e., the material of the curved pipe portion 510, is rigid polyvinyl chloride.

[0027] The curved pipe portion 510 has openings 511a and 512a at both ends. The curved pipe portion 510 is cylindrical, but the pipe axis (center line) A51 of the curved pipe portion 510 is curved rather than linear. In other words, the curved pipe portion 510 has a curved pipe axis A51. The pipe axis A51 of the curved pipe portion 510 defines the pipe axis of the first bent pipe 51.

[0028] Figure 2 is a cross-sectional view of the first bent tube 51 on a plane including the tube axis A51 of the bent tube portion 510. The inner diameter of the bent tube portion 510 of the first bent tube 51 in Figure 2 is approximately uniform. In Figure 2, R51 indicates the radius of curvature of the tube axis A51. The radius of curvature R51 of the tube axis A51 defines the radius of curvature of the first bent tube 51. O51 indicates the center of the circle that defines the radius of curvature R51.

[0029] 2, θ51 indicates the angle between center lines C511 and C512 of openings 511a and 512a at both ends of first bent pipe 51 in a cross section taken along a plane including pipe axis A51 of first bent pipe 51. θ51 is, for example, 91.17° as specified in JIS K 6739 "Rigid polyvinyl chloride pipe fittings for drainage."

[0030] In FIG. 2, δ51 is the diameter [mm] of openings 511a, 512a of curved pipe portion 510. δ51 may be determined taking into consideration the target drainage capacity of piping system 1, etc. δ51 may be set in accordance with the standard JIS K 6739 "Rigid Polyvinyl Chloride Pipe Fittings for Drainage." δ51 may be set, for example, to satisfy the standard dimensions of the nominal diameter specified in JIS K 6739. According to JIS K 6739 "Rigid Polyvinyl Chloride Pipe Fittings for Drainage," when the nominal diameter is 75 mm, 100 mm, or 125 mm, the standard dimensions are 77.2 mm, 98.8 mm, and 125 mm.

[0031] 2, in a cross section of the first bent pipe 51 taken along a plane including the pipe axis A51, the bent pipe section 510 has an inner surface 510a on the inner circumferential side and an inner surface 510b on the outer circumferential side. The inner surfaces 510a, 510b are curved as a whole. Here, in a cross section of the first bent pipe 51 taken along a plane including the pipe axis A51, the radius of curvature of the inner surface 510a is greater than 54 mm and less than 125 mm.

[0032] The sockets 511 and 512 are provided at both ends of the curved pipe section 510. The sockets 511 and 512 are provided to connect a pipe material to the first bent pipe 51. In this embodiment, the socket 511 is connected to the upstream end 4a of the horizontal pipe 4, and the socket 512 is connected to the drain 7. The sockets 511 and 512 are cylindrical and surround the openings 511a and 512a of the curved pipe section 510, respectively. In FIG. 2, the sockets 511 and 512 have the same shape.

[0033] 2 shows D51, d51, and l51 as dimensions of the socket 511 of the first bent pipe 51. l51 is the length of the socket 511 (or the length of the socket 512) in a cross section taken along a plane including the pipe axis A51 of the curved pipe portion 510. D51 is the outer diameter [mm] of the socket 511 (or the socket 512). d51 is the inner diameter [mm] of the socket 511 (or the socket 512). The dimensions D51, d51, and l51 of the first bent pipe 51 may be set in accordance with, for example, the standard JIS K 6739 "Rigid polyvinyl chloride pipe joints for drainage."

[0034] 3 is a cross-sectional view of second bent pipe 52. Second bent pipe 52 has a curved pipe portion (bent portion) 520 and sockets 521 and 522. Bent pipe portion 520 and sockets 521 and 522 are formed as a continuous, integrated unit. The material of second bent pipe 52, i.e., the material of bent pipe portion 520, is rigid polyvinyl chloride.

[0035] The curved pipe portion 520 has openings 521a and 522a at both ends. The curved pipe portion 520 is cylindrical, but the pipe axis (center line) A52 of the curved pipe portion 520 is curved rather than linear. In other words, the curved pipe portion 520 has a curved pipe axis A52. The pipe axis A52 of the curved pipe portion 520 defines the pipe axis of the second bent pipe 52.

[0036] Figure 3 is a cross-sectional view of the second bent pipe 52 on a plane including the pipe axis A52 of the bent pipe portion 520. The inner diameter of the bent pipe portion 520 of the second bent pipe 52 in Figure 3 is approximately uniform. In Figure 3, R52 indicates the radius of curvature of the pipe axis A52. The radius of curvature R52 of the pipe axis A52 defines the radius of curvature of the second bent pipe 52. O52 indicates the center of the circle that defines the radius of curvature R52.

[0037] 3, θ52 indicates the angle between center lines C521 and C522 of openings 521a and 522a at both ends of second bent pipe 52 in a cross section taken along a plane including pipe axis A52 of second bent pipe 52. θ52 is, for example, 91.17° as specified in JIS K 6739 "Rigid polyvinyl chloride pipe fittings for drainage."

[0038] In FIG. 3, δ52 is the diameter [mm] of openings 521a, 522a of curved pipe portion 520. δ52 may be determined taking into consideration the target drainage capacity of piping system 1, etc. δ52 may be set in accordance with the standard JIS K 6739 "Rigid Polyvinyl Chloride Pipe Fittings for Drainage." δ52 may be set, for example, to satisfy the standard dimensions of the nominal diameter specified in JIS K 6739. According to JIS K 6739 "Rigid Polyvinyl Chloride Pipe Fittings for Drainage," when the nominal diameter is 75 mm, 100 mm, or 125 mm, the standard dimensions are 77.2 mm, 98.8 mm, and 125 mm.

[0039] As shown in FIG. 3, in a cross section of the second bent tube 52 taken along a plane including the tube axis A52, the bent tube portion 520 has an inner surface 520a on the inner circumferential side and an inner surface 520b on the outer circumferential side. The inner surface 520a has a corner 520c. The corner 520c is located in the middle portion of the inner surface 520a between the openings 521a and 522a. The corner 520c has an R-shape. In a cross section of the second bent tube 52 taken along a plane including the tube axis A52, the radius of curvature of the corner 520c is 0 mm or more and 54 mm or less, preferably 0 mm or more and 2 mm or less. The inner surface 520b does not have a corner like the corner 520c. The inner surface 520b is curved overall.

[0040] The sockets 521 and 522 are provided at both ends of the curved pipe section 520. The sockets 521 and 522 are provided to connect a pipe material to the second bent pipe 52. In this embodiment, the socket 521 is connected to the upstream end 3a of the standpipe 3, and the socket 522 is connected to the downstream end 4b of the horizontal pipe 4. The sockets 521 and 522 are cylindrical and surround the openings 521a and 522a of the curved pipe section 520, respectively. In FIG. 3, the sockets 521 and 522 have the same shape.

[0041] 3 shows D52, d52, and l52 as dimensions of the socket 521 of the second bent pipe 52. l52 is the length of the socket 521 (or the length of the socket 522) in a cross section taken along a plane including the pipe axis A52 of the curved pipe portion 520. D52 is the outer diameter [mm] of the socket 521 (or the socket 522). d52 is the inner diameter [mm] of the socket 521 (or the socket 522). The dimensions D52, d52, and l52 of the second bent pipe 52 may be set in accordance with, for example, the standard JIS K 6739 "Rigid polyvinyl chloride pipe joints for drainage."

[0042] In this embodiment, the first bent pipe 51 and the second bent pipe 52 have the same nominal diameter. The angle θ51 between the center lines C511 and C512 of the openings 511a and 512a at both ends of the first bent pipe 51 in a cross section taken along a plane including the pipe axis A51 of the first bent pipe 51 is equal to the angle θ52 between the center lines C521 and C522 of the openings 521a and 522a at both ends of the second bent pipe 52 in a cross section taken along a plane including the pipe axis A52 of the second bent pipe 52. Meanwhile, the radius of curvature R52 of the second bent pipe 52 is smaller than the radius of curvature R51 of the first bent pipe 51. Thus, the first bent pipe 51 and the second bent pipe 52 have different shapes.

[0043] In this embodiment, the first bent pipe 51 and the second bent pipe 52 are 90° elbows. In this case, the distance between the inlet 2b and the vertical pipe 3 in the horizontal direction can be increased while shortening the length of the horizontal pipe 4. In particular, the first bent pipe 51 is a 90° large bend elbow (so-called LL) defined in JIS K 6739. The second bent pipe 52 is a 90° elbow (so-called DL) defined in JIS K 6739. The 90° elbow defined in JIS K 6739 is smaller and has better designability than the 90° large bend elbow defined in JIS K 6739. Therefore, the designability of the exterior of the piping system 1 can be improved. The piping system 1 can be made less noticeable relative to the building 11. Pipe materials of a common standard can be used for the first bent pipe 51 and the second bent pipe 52, making it easier to install the piping system 1.

[0044] The piping system 1 includes a first bent pipe 51 and a second bent pipe 52. The direction of the flow path changes in each of the first bent pipe 51 and the second bent pipe 52. When the direction of the flow path changes, pressure loss due to separation can be a factor in a decrease in flow rate. In this embodiment, the radius of curvature R52 of the second bent pipe 52 is smaller than the radius of curvature R51 of the first bent pipe 51. Therefore, the pressure loss caused by the second bent pipe 52 tends to be larger than the pressure loss caused by the first bent pipe 51. In order to reduce the decrease in flow rate due to the pressure loss caused by the second bent pipe 52, a protrusion member 6 is provided.

[0045] 1, the protruding member 6 is located downstream of the second bent pipe 52. More specifically, the protruding member 6 is located on the inner circumferential side of the second bent pipe 52 within the vertical pipe 3, which is a straight pipe section downstream of the second bent pipe 52, and is used to partially reduce the flow path cross-sectional area of ​​the vertical pipe 3.

[0046] The protrusion member 6 is located on the side of the socket 522 in the straight pipe 32 connected to the socket 521 of the joint (second bent pipe 52) having a first socket (socket 521) and a second socket (socket 522) oriented in a different direction from the first socket, and partially reduces the flow path cross-sectional area of ​​the straight pipe 32. The protrusion member 6 is arranged so that at least a portion of the standpipe 3 is a straight pipe. In this embodiment, at least a portion of the standpipe 3 is a straight pipe 32.

[0047] In this embodiment, the second bent pipe 52, the straight pipe 32 of the vertical pipe 3, and the protruding member 6 constitute the piping member 10. In this embodiment, the piping member 10 is constituted not by the entire vertical pipe 3 but by a portion of the vertical pipe 3 (the straight pipe 32), which improves the portability of the piping member 10. In particular, it is preferable that the length of the straight pipe 32 be 1.0 m or less. This further improves the portability of the piping member 10.

[0048] Fig. 4 is a perspective view of a configuration example of the piping member 10, and Fig. 5 is an exploded perspective view of the piping member 10. As can be seen from Figs. 4 and 5, the piping member 10 includes a second bent pipe 52, a straight pipe 32 of the vertical pipe 3, and a protruding member 6.

[0049] 5, the protruding member 6 has a size, i.e., a length, width, and height (thickness), that allows it to be placed inside the straight pipe 32 of the vertical pipe 3. In this embodiment, the protruding member 6 does not protrude outward from the straight pipe 32 from the end of the straight pipe 32 opposite the second bent pipe 52. This reduces the possibility that the protruding member 6 will be damaged when the piping member 10 is transported, etc.

[0050] In this embodiment, the protruding member 6 and the straight pipe 32 of the upright pipe 3 are separate bodies and can be made of different materials. Examples of materials for the protruding member 6 include resins such as polyvinyl chloride (PVC), hard polyvinyl chloride (hard PVC), PMMA, ABS, and ASA, and metals such as steel, aluminum, and stainless steel (metals that do not rust). In particular, the difference between the linear expansion coefficient of the material of the protruding member 6 and the linear expansion coefficient of the material of the portion to which the protruding member 6 is attached (in this embodiment, the straight pipe 32 of the upright pipe 3) is 4.7 × 10 -5 Less than or equal to 3.5 x 10 -5 This reduces the possibility of the protruding members 6 peeling off due to expansion and contraction caused by temperature differences (for example, temperature differences between summer and winter). As an example, the material of the protruding members 6 may be ASA, and the material of the standpipe 3 may be PVC.

[0051] The protruding member 6 has a first surface 60a and a second surface 60b. The first surface 60a is the surface facing the inner circumferential surface 30a of the standpipe 3. The second surface 60b is located on the opposite side of the first surface 60a and acts on (comes into contact with) the fluid flowing through the flow path. The first surface 60a and the second surface 60b are both surfaces of the protruding member 6 in a first direction. The first direction corresponds to the height of the protruding member 6.

[0052] The protruding member 6 has a first end 6a and a second end 6b in a second direction perpendicular to the first direction. The second direction corresponds to the width of the protruding member 6. The first end 6a and the second end 6b are both ends of the protruding member 6 in the width direction. The width direction of the protruding member 6 is perpendicular to the direction of the central axis C3 of the vertical pipe 3. The protruding member 6 has an outer shape that is mirror-symmetrical with respect to a plane perpendicular to the second direction.

[0053] The protrusion member 6 has a third end 6c and a fourth end 6d in a third direction perpendicular to the first and second directions. The third direction corresponds to the length of the protrusion member 6. The third end 6c and the fourth end 6d are both ends of the protrusion member 6 in the longitudinal direction. The longitudinal direction of the protrusion member 6 coincides with the direction of the central axis C3 of the standpipe 3. Therefore, the third direction is also the direction along the flow path of the standpipe 3. The third end 6c faces upstream, and the fourth end 6d faces downstream. In the protrusion member 6, a fluid flow occurs from the third end 6c to the fourth end 6d.

[0054] FIG. 6 is a cross-sectional view of the piping member 10. FIG. 7 is an enlarged view of P1 in FIG. 6. FIG. 8 is a cross-sectional view taken along line AA in FIG. 6. FIG. 9 is a cross-sectional view with a portion of the piping member 10 cut away. FIG. 10 is a plan view of the piping member 10. FIG. 11 is a bottom view of the piping member 10. FIG. 12 is a cross-sectional view taken along line XX in FIG. 8. FIG. 13 is a cross-sectional view taken along line XI-XI in FIG. 8. FIG. 14 is a cross-sectional view taken along line XII-XII in FIG. 8. FIG. 15 is a cross-sectional view taken along line XIII-XIII in FIG. 8. Note that the second bent tube 52 is not shown in FIGS. 9 to 15.

[0055] FIG. 16 is a front view of the protruding member 6 (view of the protruding member 6 from the second surface 60b). FIG. 17 is a rear view of the protruding member 6 (view of the protruding member 6 from the first surface 60a). FIG. 18 is a side view of the protruding member 6 (view of the protruding member 6 from the first end 6a). FIG. 19 is another side view of the protruding member 6 (view of the protruding member 6 from the second end 6b).

[0056] As shown in FIG. 17, the first surface 60a has an outer periphery 601 and a central portion 602.

[0057] The outer circumferential portion 601 is used to fix the protruding member 6 to the standpipe 3. As shown in FIGS. 10 to 15 , the outer circumferential portion 601 is a portion of the first surface 60a that can come into contact with the inner circumferential surface 30a. The shape of the outer circumferential portion 601 is set so that it can come into contact with the inner circumferential surface 30a of the standpipe 3. For example, the outer circumferential portion 601 has a convex shape when viewed from the direction of the central axis C3 of the standpipe 3. The radius of curvature of the first surface 60a is set based on the radius of curvature of the inner circumferential surface 30a so that no gap is substantially generated between the first surface 60a and the inner circumferential surface 30a of the standpipe 3.

[0058] 17, the outer peripheral portion 601 extends along the entire periphery of the first surface 60a, and therefore surrounds the central portion 602 over the entire periphery.

[0059] The outer peripheral portion 601 has a groove 603. The groove 603 runs along at least a portion of the outer periphery of the first surface 60a. The groove 603 is used to apply an adhesive to fix the protruding member 6 to the standpipe 3. For example, the groove 603 can be used as a guide for applying the adhesive to the first surface 60a of the protruding member 6. This facilitates the assembly work of the piping member 10 or the installation work of the piping system 1, and reduces the likelihood of the protruding member 6 falling off or being left unattached.

[0060] In this embodiment, the groove 603 extends along the entire outer periphery of the first surface 60a. In Fig. 17, the groove 603 is made up of groove portions 603a, 603b, 603c, and 603d that extend along the sides of the first surface 60a on the first end 6a, second end 6b, third end 6c, and fourth end 6d sides, respectively.

[0061] In this embodiment, the groove 603 is located at a distance of 1 mm to 15 mm from the outer periphery of the first surface 60a. That is, the grooves 603a, 603b, 603c, and 603d are located at a distance of 1 mm to 15 mm from the sides of the first surface 60a on the first end 6a, second end 6b, third end 6c, and fourth end 6d sides.

[0062] In this embodiment, as shown in Fig. 24 described later, the cross-sectional shape of the groove 603 is triangular. The groove 603 has a first inner side surface 6031 and a second inner side surface 6032. The first inner side surface 6031 corresponds to a first direction (the height of the protruding member 6) in which the first surface 60a and the second surface 60b face each other. The second inner side surface 6032 corresponds to a second direction (the width of the protruding member 6) perpendicular to the first direction. This makes it easier to fix the protruding member 6 to the upright pipe 3 with an adhesive.

[0063] When manufacturing the protrusion member 6 by resin molding technology, it is possible to divide the mold for the protrusion member 6 in the second direction of the protrusion member 6. As described above, the groove 603 has the first inner surface 6031 and the second inner surface 6032, and therefore can be easily formed using a mold. This makes it possible to reduce the manufacturing cost of the protrusion member 6.

[0064] 24, the width W4 of the groove 603 is 0.5 mm or more and 3.0 mm or less. The depth d4 of the groove 603 is 0.2 mm or more and 2.0 mm or less. This makes it easier to fix the protruding member 6 to the straight pipe (vertical pipe 3) with an adhesive.

[0065] The central portion 602 is a portion of the first surface 60a that is recessed from the outer peripheral portion 601. As a result, as shown in FIGS. 12 to 15, even when the outer peripheral portion 601 comes into contact with the inner peripheral surface 30a, a gap is formed between at least a part of the central portion 602 and the inner peripheral surface 30a. The central portion 602 can function as a buffer for excess adhesive used to fix the protruding member 6 to the standpipe 3. This allows the central portion 602 to receive excess adhesive applied to the first surface 60a of the protruding member 6, reducing the possibility of the adhesive spilling out of the protruding member 6. This reduces the possibility of a decrease in flow rate due to such spillage of adhesive.

[0066] The central portion 602 is composed of a first region 602a on the first end 6a side of the protruding member 6 and a second region 602b on the second end 6b side of the protruding member 6. The first region 602a and the second region 602b are flat surfaces. The first region 602a is inclined so as to move away from the inner circumferential surface 30a as it moves toward the first end 6a. The second region 602b is inclined so as to move away from the inner circumferential surface 30a as it moves toward the second end 6b. The first region 602a and the second region 602b are rectangular, and the dimension in the second direction is shorter than the dimension in the third direction. The dimension in the second direction of each of the first region 602a and the second region 602b is 5% to 20% of the maximum dimension W1 of the first surface 60a in the second direction. Therefore, in this embodiment, the dimension W3 of the central portion 602 in the second direction perpendicular to the first direction in which the first surface 60a and the second surface 60b face each other is 10% to 40% of the maximum dimension W1 of the first surface 60a in the second direction. This further reduces the overflow of the adhesive that fixes the protruding member 6 to the straight pipe (vertical pipe 3).

[0067] In this embodiment, the central portion 602 is line-symmetrical about the center line of the protruding member 6 in the second direction (the width of the protruding member 6). Therefore, the first region 602a and the second region 602b are line-symmetrical about the center line of the protruding member 6 in the second direction (the width of the protruding member 6). This further reduces the overflow of adhesive that fixes the protruding member 6 to the straight pipe (upright pipe 3).

[0068] As described above, the outer peripheral portion 601 completely surrounds the central portion 602. That is, in the protruding member 6, the central portion 602 is completely surrounded by the outer peripheral portion 601. This further reduces the overflow of the adhesive that fixes the protruding member 6 to the standpipe 3.

[0069] When the protruding member 6 is manufactured by a resin molding technique, it is preferable to provide a gate in a portion of the mold corresponding to the central portion 602. Even if a gate residue occurs, the central portion 602 is a portion of the first surface 60a that is recessed from the outer peripheral portion 601. Therefore, it is possible to reduce the possibility that the gate residue will get in the way when fixing the protruding member 6 to the standpipe 3.

[0070] As shown in FIGS. 6, 8 to 11, and 16, the second surface 60b includes a main surface 61 and first and second side surfaces 62, 63. As shown in FIGS. 6, 8 to 9, the main surface 61 extends from the third end 6c toward the fourth end 6d. As shown in FIGS. 10 and 11, the main surface 61 faces the center of the standpipe 3 when viewed from the direction of the central axis C3 of the standpipe 3. The first side surface 62 and the second side surface 63 are located on both sides of the main surface 61 when viewed from the direction of the central axis C3 of the standpipe 3. The first side surface 62 is located on the first end 6a side of the main surface 61 (left side in FIG. 10), and the second side surface 63 is located on the second end 6b side of the main surface 61 (right side in FIG. 10).

[0071] In the protruding member 6, the main surface 61 and the first and second side surfaces 62, 63 of the second surface 60b can come into contact with the fluid flowing inside the standpipe 3. As shown in Fig. 8, the protruding member 6 causes a flow F1 along the main surface 61, a flow F2 along the first side surface 62, and a flow F3 along the second side surface 63. Because the main surface 61 and the first and second side surfaces 62, 63 can come into contact with the fluid, it is preferable that the surface roughness of the main surface 61 and the first and second side surfaces 62, 63 be small, as this can be expected to improve the flow rate.

[0072] The protrusion member 6 has a first separation wall 64 for promoting separation of the flow F1 and the flow F2. The presence of the first separation wall 64 can make it easier for the flow F2 to separate from the flow F1. The first separation wall 64 is located between the main surface 61 and the first side surface 62. In this embodiment, the first separation wall 64 is the boundary between the main surface 61 and the first side surface 62. In other words, the boundary between the main surface 61 and the first side surface 62 forms a wall between a flow path having the main surface 61 as its bottom surface and a flow path having the first side surface 62 as its bottom surface. The first separation wall 64 can be formed by having both the main surface 61 and the first side surface 62 have a concave shape.

[0073] The protrusion member 6 has a second separation wall 65 to promote separation of the flow F1 and the flow F3. The presence of the second separation wall 65 can make it easier for the flow F3 to separate from the flow F1. The second separation wall 65 is located between the main surface 61 and the second side surface 63. In this embodiment, the second separation wall 65 is the boundary between the main surface 61 and the second side surface 63. In other words, the boundary between the main surface 61 and the second side surface 63 forms a wall between a flow path having the main surface 61 as its bottom surface and a flow path having the second side surface 63 as its bottom surface. The second separation wall 65 can be formed by making both the main surface 61 and the second side surface 63 concave.

[0074] As shown in Figures 6, 9, 10, and 16 to 19, the protruding member 6 has an end face 66 at the third end 6c. The end face 66 intersects with the central axis C3 of the standpipe 3. In this embodiment, the end face 66 is perpendicular to the central axis C3 of the standpipe 3. The third end 6c of the protruding member 6 has a small thickness. In contrast, because the protruding member 6 has the end face 66, the possibility of damage to the third end 6c of the protruding member 6 can be reduced.

[0075] As shown in FIGS. 6, 13, and 17 to 19, the protrusion member 6 has a protrusion 67. The protrusion 67 is used to join or position the standpipe 3 and the protrusion member 6. The protrusion 67 is arranged on the first surface 60a. The protrusion 67 is shaped to fit into a hole 3c on the inner circumferential surface of the standpipe 3. In this embodiment, the standpipe 3 has a pair of holes 3c at the upstream end 3a. The holes 3c are formed as through holes. The protrusion member 6 has a pair of protrusions 67 that fit into the pair of holes 3c, respectively. The protrusion member 6 is positioned relative to the standpipe 3 by fitting the pair of protrusions 67 into the pair of holes 3c, respectively.

[0076] As shown in FIGS. 6, 7, and 16 to 19, the protrusion member 6 has an end face 68 at the fourth end 6d. The end face 68 intersects with the central axis C3 of the standpipe 3. In this embodiment, the end face 68 is perpendicular to the central axis C3 of the standpipe 3. The end face 68 has an opening 69. The opening 69 is connected to the internal space of the protrusion member 6.

[0077] Fig. 20 is an exploded perspective view of the protrusion member 6, and Fig. 21 is another exploded perspective view of the protrusion member 6. As can be seen from Figs. 20 and 21, the protrusion member 6 is composed of a first portion 610 and a second portion 620, which are separate bodies. The first portion 610 is a portion of the protrusion member 6 on the side of the first end 6a in the second direction perpendicular to the first direction, where the first surface 60a and the second surface 60b face each other. The second portion 620 is a portion of the protrusion member 6 on the side of the second end 6b in the second direction.

[0078] 22 is a side view of the first portion 610. The first portion 610 occupies half of the first end 6a side of the protruding member 6. The first portion 610 has a first outer portion 611, a first boss 612, first ribs 613 and 614, a receiving portion 615, and a recess 616.

[0079] The first outer portion 611 defines the outer shape of the first end 6a of the protruding member 6. The first outer portion 611 has a hollow shape with an opening 611b on a third surface 611a facing the second part 620. Because the first outer portion 611 is hollow, the amount of material required can be reduced compared to a solid first outer portion 611. The first outer portion 611 includes the first surface 60a, the second surface 60b, the third end 6c, the fourth end 6d, the end face 66, the protrusion 67, the end face 68, and first portions 60a1, 60b1, 6c1, 6d1, 66a, 67a, 68a, and 69a on the first end 6a side of the opening 69. The first portion 60a1 of the first surface 60a includes a first portion 601a of the outer periphery 601 and a first region 602a of the central portion 602. The first portion 601a of the outer circumferential portion 601 includes, as a first portion of the groove 603, a groove portion 603a, a first portion 603c1 of the groove portion 603c, and a first portion 603d1 of the groove portion 603d.

[0080] The first boss 612 extends from the inner surface of the first outer portion 611 toward the second portion 620 along the second direction. The first boss 612 is cylindrical. The first boss 612 has a hole 612a into which a second boss 622, which will be described later, fits. In this embodiment, the first portion 610 has two first bosses 612. The two first bosses 612 are aligned along the third direction.

[0081] The first ribs 613, 614 extend within the first outer portion 611 in a direction perpendicular to the second direction and connect two points on the inner surface of the first outer portion 611. The first rib 613 extends along the third direction. The first rib 614 extends along the first direction. In this embodiment, the first portion 610 has two first ribs 614. The two first ribs 614 are aligned along the third direction. Although the first outer portion 611 is hollow, the presence of the first ribs 613, 614 reduces a decrease in strength of the first portion 610.

[0082] Receiving portion 615 is formed around opening 611b of third surface 611a. Receiving portion 615 has a shape that fits a peripheral wall portion 625, which will be described later. In this embodiment, receiving portion 615 is a step portion formed around the entire periphery of opening 621b.

[0083] The recess 616 is used to connect the first part 610 and the second part 620. The recess 616 is a portion of the first part 610 into which a protrusion 626 (described later) of the second part 620 fits. The recess 616 is formed on the first surface 60a side of the first part 610. In this embodiment, the recess 616 is an opening located on the first surface 60a. The recess 616 is rectangular. The recess 616 is located in a position recessed from a portion of the first surface 60a that can contact the inner circumferential surface 30a. This reduces the possibility that the recess 616 will get in the way when fixing the protrusion member 6 to the standpipe 3. More specifically, as shown in FIGS. 17 and 18 , the recess 616 is located in the central part 602, not the outer circumferential part 601, of the first surface 60a. In this embodiment, the first part 610 has two recesses 616. The two recesses 616 are located on the third end 6c side and the fourth end 6d side in the central portion 602 of the first surface 60a. In particular, the recess 616 on the third end 6c side is located between the two protrusions 67 in the third direction.

[0084] 23 is a side view of the second portion 620. The second portion 620 occupies half of the second end 6b side of the protruding member 6. The second portion 620 has a second outer portion 621, a second boss 622, second ribs 623 and 624, a peripheral wall portion 625, and a protrusion 626.

[0085] The second outer portion 621 defines the outer shape of the second end 6b of the protruding member 6. The second outer portion 621 has a hollow shape with an opening 621b on a fourth surface 621a facing the first part 610. Because the second outer portion 621 is hollow, the amount of material required can be reduced compared to a solid second outer portion 621. The second outer portion 621 includes the first surface 60a, the second surface 60b, the third end 6c, the fourth end 6d, the end face 66, the protrusion 67, the end face 68, and second portions 60a2, 60b2, 6c2, 6d2, 66b, 67b, 68b, and 69b on the second end 6b side of the opening 69. The second portion 60a2 of the first surface 60a includes the second portion 601b of the outer periphery 601 and the second region 602b of the central portion 602. The second portion 601b of the outer circumferential portion 601 includes, as the second portion of the groove 603, the groove portion 603b, the second portion 603c2 of the groove portion 603c, and the second portion 603d2 of the groove portion 603d.

[0086] The second boss 622 extends from the inner surface of the second outer portion 621 toward the first part 610 along the second direction. The second boss 622 is coupled to the first boss 612. The second boss 622 is cylindrical. The second boss 622 is sized to fit into the hole 612a of the first boss 612. The second boss 622 is coupled to the first boss 612 by fitting into the hole 612a of the first boss 612. In this embodiment, the second part 620 has two second bosses 622. The two second bosses 622 are aligned along the third direction.

[0087] The second ribs 623, 624 extend in a direction perpendicular to the second direction within the second outer shell 621 and connect two points on the inner surface of the second outer shell 621. The second rib 623 extends along the third direction. The second rib 624 extends along the first direction. In this embodiment, the second part 620 has two second ribs 624. The two second ribs 624 are aligned along the third direction. Although the second outer shell 621 is hollow, the presence of the second ribs 623, 624 reduces a decrease in strength of the second part 620.

[0088] Peripheral wall portion 625 protrudes from the periphery of opening 621b in fourth surface 621a toward first end 6a and surrounds opening 621b in fourth surface 621a. In this embodiment, peripheral wall portion 625 has a shape that surrounds opening 621b all around. Peripheral wall portion 625 has a shape that fits inside receiving portion 615.

[0089] The protrusion 626 is used to connect the first portion 610 and the second portion 620. The protrusion 626 is adapted to fit into the recess 616. By fitting the protrusion 626 into the recess 616 in this manner, separation between the first portion 610 and the second portion 620 is reduced. The protrusion 626 extends toward the first end 6a. The protrusion 626 is formed on the first surface 60a side of the second portion 620. In this embodiment, the protrusion 626 includes a long plate-shaped spring portion 626a and a claw portion 626b at the tip of the spring portion 626a. The protrusion 626 is fixed to the recess 616 by fitting the claw portion 626b into the recess 616. The protrusion 626 is located in a recessed position on the first surface 60a relative to a portion that can contact the inner circumferential surface 30a. This reduces the possibility that the protrusion 626 will get in the way when fixing the protruding member 6 to the upright pipe 3. 17 and 19, the protrusion 626 is located in the central portion 602 of the first surface 60a, not in the outer periphery 601. In this embodiment, the second portion 620 includes two protrusions 626. The two protrusions 626 are located on the third end 6c side and the fourth end 6d side in the central portion 602 of the first surface 60a. In particular, the protrusion 626 on the third end 6c side is located between the two protrusions 67 in the third direction.

[0090] The protrusion member 6 is assembled by joining the first part 610 and the second part 620 together so that the third surface 611a of the first part 610 and the fourth surface 621a of the second part 620 face each other. Fig. 24 is a cross-sectional view of the protrusion member 6. As can be seen from Figs. 18 and 24, when the protrusion member 6 is assembled, the protrusion 626 fits into the recess 616, the second boss 622 is joined to the first boss 612, and the peripheral wall portion 625 fits into the receiving portion 615.

[0091] In the protruding member 6, the tip of the second boss 622 is located between the tip of the protrusion 626 and the fourth surface 621a in the second direction. Therefore, when the first part 610 and the second part 620 are joined together, the protrusion 626 comes into contact with the first part 610 rather than the second boss 622 and fits into the recess 616. This allows the second boss 622 to be positioned relative to the first boss 612. This makes it easier to join the first part 610 and the second part 620. In the second direction, the tip of the second boss 622 is located between the tip of the protrusion 626 and the tip of the peripheral wall part 625. Therefore, after the second boss 622 is joined to the first boss 612, the peripheral wall part 625 fits into the receiving part 615. This makes it easier to position the peripheral wall part 625 relative to the receiving part 615. This makes it easier to join the first part 610 and the second part 620.

[0092] By joining the first portion 610 and the second portion 620, the first portions 60a1, 60b1, 6c1, 6d1, 66a, 67a, 68a, 69a of the first portion 610 and the second portions 60a2, 60b2, 6c2, 6d2, 66b, 67b, 68b, 69b of the second portion 620 are combined to form the first surface 60a, the second surface 60b, the third end 6c, the fourth end 6d, the end surface 66, the protrusion 67, the end surface 68, and the opening 69.

[0093] In this way, in the protrusion member 6, the first portion 610 on the side of the first end 6a in the second direction perpendicular to the first direction in which the first surface 60a and the second surface 60b face each other, and the second portion 620 on the side of the second end 6b in the second direction, are separate bodies. Therefore, the first portion 610 and the second portion 620 can be manufactured separately using a molding technique using a mold, such as injection molding. Therefore, it is possible to simplify the configuration of the mold required to manufacture the protrusion member 6 compared to manufacturing the protrusion member 6 as a single part using a molding technique using a mold. This reduces the cost of the mold itself, and as a result, makes it possible to reduce the manufacturing cost of the protrusion member 6.

[0094] Because the first outer portion 611 and the second outer portion 621 are hollow, the amount of material required can be reduced compared to when they are solid. Unlike when the protruding member 6 is manufactured as a single part by molding using a mold, when the protruding member 6 is hollow, openings can be provided not in the first surface 60a but in the third surface 611a of the first outer portion 611 and the fourth surface 621a of the second outer portion 621. This increases the area of ​​the first surface 60a that can be used for bonding the protruding member 6.

[0095] In the protrusion member 6, the interior of the first outer portion 611 and the interior of the second outer portion 621 form the internal space of the protrusion member 6. Fluid may enter the internal space of the protrusion member 6 through the gap between the first portion 610 and the second portion 620. If the fluid is water, it may freeze due to a drop in temperature. In this case, the water expands as it freezes, which may cause damage to the protrusion member 6. In this embodiment, the peripheral wall portion 625 of the second portion 620 fits inside the receiving portion 615 of the first portion 610, thereby reducing the possibility of fluid entering through the gap between the first portion 610 and the second portion 620. Furthermore, in the protrusion member 6, the opening 69 on the end surface 68 connects to the interior of the first outer portion 611 and the interior of the second outer portion 621. Therefore, water that enters the internal space of the protrusion member 6 can be drained through the opening 69. This reduces the possibility of damage to the protrusion member 6 caused by fluid such as water accumulating in the internal space of the protrusion member 6. That is, the opening 69 acts as a drain hole.

[0096] Next, the assembly of the piping member 10 will be described with reference to FIGS.

[0097] 25 is an explanatory diagram of the attachment of the protruding member 6 to the straight pipe 32. The protruding member 6 is disposed on the inner peripheral surface 30a of the straight pipe 32 of the vertical pipe 3. An adhesive is applied to the first surface 60a, and the protruding member 6 is adhered to the straight pipe 32 by the adhesive. In this way, in the piping member 10, the protruding member 6 and the straight pipe 32 are integrally joined.

[0098] As described above, the groove 603 is formed on the outer peripheral portion 601 of the first surface 60a. The groove 603 can be used as a guide for applying adhesive to the first surface 60a of the protruding member 6. This facilitates the installation of the protruding member 6 and reduces the likelihood of the protruding member 6 falling off or being left unattached. The central portion 602 of the first surface 60a is recessed from the outer peripheral portion 601, so it can function as a buffer for excess adhesive. This allows the central portion 602 to receive excess adhesive applied to the first surface 60a of the protruding member 6, reducing the likelihood of the adhesive spilling out of the protruding member 6. In this embodiment, the protruding member 6 is positioned relative to the straight pipe 32 by fitting the pair of protrusions 67 into the pair of holes 3c, respectively. By fitting the pair of protrusions 67 into the pair of holes 3c, respectively, the likelihood of the protruding member 6 falling off the straight pipe 32 is reduced compared to when adhesive alone is used. Here, the protrusion 67 is composed of a first portion 67a of the first part 610 and a second portion 67b of the second part 620. By inserting the protrusion 67 into the hole 3c, the possibility of the protrusion 67 separating into the first portion 67a and the second portion 67b is reduced. This makes it easier to maintain the state in which the first part 610 and the second part 620 are joined together.

[0099] 26 is an explanatory diagram of the attachment of the straight pipe 32 to the second bent pipe 52. The straight pipe 32, to which the protrusion members 6 are integrally attached, is positioned downstream of the second bent pipe 52, with the upstream end 3a inserted into the socket 521 of the second bent pipe 52. An adhesive is applied to the upstream end 3a, and the straight pipe 32 is adhered to the second bent pipe 52 by the adhesive. In this way, the straight pipe 32 and the second bent pipe 52 are integrally attached to the piping member 10. When the straight pipe 32 is connected to the socket 521 of the second bent pipe 52, the pair of holes 3c of the vertical pipe 3 are hidden by the socket 521.

[0100] When attaching the straight pipe 32 to the second bent pipe 52, it is desirable that the protruding member 6 arranged inside the straight pipe 32 be positioned on the side of the socket 522 of the second bent pipe 52 (i.e., on the inner peripheral side of the curved pipe portion 520). However, because the protruding member 6 is inside the straight pipe 32, it is difficult to visually recognize the protruding member 6 from outside the straight pipe 32. Therefore, as shown in Figures 25 and 26, the straight pipe 32 has a mark 3d to indicate the position of the protruding member 6 on the straight pipe 32.

[0101] The mark 3d is located on the outer circumferential surface of the straight pipe 32. In this embodiment, the mark 3d is aligned with the pair of holes 3c along the central axis C3 of the straight pipe 32. For example, the mark 3d is an arrow (upward arrow) for indicating the appropriate position of the protrusion member 6 relative to the second bent pipe 52. The mark 3d may be a character, a figure, a symbol, a three-dimensional shape, a color, or a combination thereof that is recognizable by human perception. If the mark 3d is a three-dimensional shape, the mark 3d may be formed integrally and continuously with the straight pipe 32. The mark 3d may also be provided by attaching a sticker or the like to the straight pipe 32.

[0102] The mark 3d is located in a position where it will not be hidden by the socket 521 of the second bent pipe 52 when the straight pipe 32 is connected to the second bent pipe 52. This makes it easy to position the protruding member 6 in a desired position (position on the socket 522 side) relative to the second bent pipe 52.

[0103] In the piping member 10, the straight pipe 32 is integrally joined to the second bent pipe 52, so the protruding member 6 in the straight pipe 32 is positioned in advance at a desired position relative to the second bent pipe 52. Therefore, by using the piping member 10, it is no longer necessary to align the protruding member 6 with the second bent pipe 52 when installing the piping system 1, and the possibility of forgetting to install the protruding member 6 itself is reduced. In this way, the piping member 10 makes it possible to reduce installation errors.

[0104] In the piping member 10, the protruding member 6 is arranged so that the flow path cross-sectional area of ​​the piping member 10 is not constant, and there is a reduced portion where the flow path cross-sectional area of ​​the piping member 10 is smaller than the cross-sectional area of ​​the straight pipe 32. The protruding member 6 is located closer to the upstream end 3a of the standpipe 3 than the downstream end 3b of the standpipe 3. In this embodiment, the protruding member 6 is located at the upstream end 3a of the standpipe 3. In other words, the protruding member 6 reduces the flow path at the upstream end 3a of the standpipe 3 that connects to the second bent pipe 52.

[0105] Next, the function of the protruding member 6 in the piping member 10 will be described. The protruding member 6 is disposed inside the vertical pipe 3, which is disposed downstream of the second bent pipe 52. The second bent pipe 52 directs water that has flowed in from the horizontal pipe 4 into the vertical pipe 3. If the direction of water flow changes significantly in the second bent pipe 52, pressure loss due to separation can be one factor in reducing the flow rate.

[0106] FIG. 27 is a diagram illustrating a simulation of pressure distribution in a comparative piping member 100. The comparative piping member 100 differs from the piping member 10 in that it does not have the protruding member 6. In FIG. 27, darker colors indicate lower pressure. In particular, the pressure loss is large at the portion indicated by R in FIG. 27. The presence of such a portion can be a major factor in reducing the flow rate. The pressure loss at the portion indicated by R in FIG. 27 is believed to be due to peeling. This peeling occurs when water separates from the first wall surface 30b of the piping member 100 downstream of the inner wall surface 50a of the second bent pipe 52. That is, as indicated by arrow F in FIG. 27, water flowing in from the upstream side initially flows along the pipe wall 200. However, after reaching the inner wall surface 50a of the second bent pipe 52, the water may separate from the first wall surface 30b of the piping member 100. This type of peeling is particularly noticeable when the water flow velocity is high. The faster the flow velocity, the wider the area where pressure loss occurs.

[0107] In this embodiment, the piping member 10 includes a protruding member 6. The presence of the protruding member 6 is expected to (1) allow water to flow more easily along the pipe wall than without the protruding member 6, and (2) reduce the number of areas where pressure loss may occur. Therefore, the protruding member 6 reduces pressure loss due to separation downstream from the second bent pipe 52, thereby improving the flow rate. Unlike the technology described in Patent Document 1, the piping member 10 does not require a large radius of curvature on the inner circumferential surface of the second bent pipe 52, simply by including the protruding member 6, thereby enabling miniaturization. Therefore, the protruding member 6 can improve the flow rate while enabling miniaturization. The protruding member 6 is located inside the upright pipe 3, making it less noticeable when viewed from the perspective of the piping system 1 as a whole. This is expected to improve the aesthetic appearance of the piping system 1 as a whole.

[0108] Furthermore, the protruding member 6 has a protruding portion 6i in a region between the apex 6e and the fourth end 6d. Compared to when the protruding portion 6i is not present, the path of the flow (mainly the flow F1) along the protruding member 6 can be extended. This promotes the Coanda effect of the protruding member 6, and the flow rate can be improved. Furthermore, the presence of the protruding portion 6i makes it possible to improve the strength of the region of the protruding member 6 between the apex 6e and the fourth end 6d.

[0109] The shape of the protruding member 6 will now be described in more detail.

[0110] As can be seen from FIGS. 6, 8, and 10 to 15, the shape (cross-sectional shape) of the protruding member 6 seen from the direction of the central axis C3 of the standpipe 3 changes along the direction of the central axis C3 of the standpipe 3.

[0111] 6, the height of the protruding member 6 varies along the direction of the central axis C3 of the standpipe 3. In this embodiment, the protruding member 6 has a top portion 6e and a protruding portion 6i.

[0112] The top 6e is located between the third end 6c and the fourth end 6d. The top 6e is the highest part of the protruding member 6. The top 6e makes the flow path cross-sectional area of ​​the standpipe 3 the smallest.

[0113] The protruding portion 6i extends from a portion between the top portion 6e and the fourth end 6d toward the center of the standpipe 3 when viewed from the direction of the central axis C3 of the standpipe 3. In this embodiment, the protruding portion 6i is located at the fourth end 6d. When viewed from the direction of the central axis C3 of the standpipe 3, the protruding portion 6i does not protrude beyond the top portion 6e.

[0114] The height of the protruding member 6 increases monotonically from the third end 6c toward the apex 6e. The height of the protruding member 6 decreases monotonically from the apex 6e toward the fourth end 6d. In this embodiment, the height of the protruding member 6 decreases from the apex 6e to the protruding portion 6i, and then increases or decreases according to the shape of the protruding portion 6i.

[0115] As shown in Fig. 6, in a cross section perpendicular to the width direction of the protruding member 6, the main surface 61 includes a curved shape at the apex 6e that protrudes toward the second wall surface 30c. This improves the flow rate. From another perspective, the main surface 61 only needs to have a shape that protrudes toward the second wall surface 30c so as to produce the Coanda effect on the downstream side of the second bent pipe 52. In other words, the main surface 61 only needs to have a shape that produces the Coanda effect on the downstream side of the second bent pipe 52. This improves the flow rate while enabling miniaturization.

[0116] See Figures 6 and 7. If the dimension of the protrusion 6i as viewed in the direction of the central axis C3 of the riser pipe 3 is a and the inner diameter of the riser pipe 3 is d, then 0.01d≦a≦0.05d holds. This allows for an improvement in the flow rate. If the dimension of the protrusion 6i in the direction of the central axis C3 of the riser pipe 3 is b and the inner diameter of the riser pipe 3 is d, then 0.01d≦b≦0.05d holds. This allows for an improvement in the flow rate.

[0117] In Figure 7, the shape of the protruding member 6 when the height of the protruding member 6 decreases monotonically from the apex 6e toward the fourth end 6d is shown by a two-dot chain line. The dimensions a and b of the protruding portion 6i can be set based on the shape shown by the two-dot chain line. The dimension a may be the maximum amount of protrusion from the shape shown by the two-dot chain line. The dimension b may be the distance between the upstream and downstream boundaries of the shape shown by the two-dot chain line and the protruding portion 6i.

[0118] In a cross section perpendicular to the width direction of the protruding member 6, the protruding portion 6i includes a curved shape that protrudes toward the second wall surface 30c. This improves the flow rate. From another perspective, the protruding portion 6i may have a shape that protrudes toward the second wall surface 30c so as to generate the Coanda effect. In other words, the protruding portion 6i may have a shape that generates the Coanda effect downstream of the apex 6e. This improves the flow rate. Here, if the radius of curvature of the upstream corner 6j1 and the downstream corner 6j2 of the protruding portion 6i as viewed from the width direction of the protruding member 6 is r, then r≦a or r≦b. Preferably, r≦a and r≦b. The upstream corner 6j1 and the downstream corner 6j2 may have different radii of curvature.

[0119] 8, the protrusion 6i is located at the fourth end 6d and is formed across the entire width of the fourth end 6d.

[0120] 11, at least a part of the protruding portion 6i has a convex shape when viewed from the direction of the central axis C3 of the upright pipe 3. This can contribute to a reduction in pressure loss in the protruding member 6.

[0121] Referring to FIG. 6, the protrusion member 6 induces a flow F1 along the protrusion member 6, mainly along the main surface 61. The protrusion member 6 has a protrusion 6i at a portion between the apex 6e and the fourth end 6d. Referring to FIG. 7, a flow F4 can occur downstream of the flow F1 along the protrusion 6i. As a result, the path of the flow F1 can be extended compared to when the protrusion 6i is not present. This promotes the Coanda effect by the protrusion member 6, and can improve the flow rate. Furthermore, the protrusion 6i itself generates the Coanda effect, making it easier to induce the flow F4.

[0122] As can be seen from FIGS. 10 to 15, the shape of the main surface 61 seen from the direction of the central axis C3 of the standpipe 3 changes along the direction of the central axis C3 of the standpipe 3.

[0123] 10 and 12, at least a portion of the main surface 61 has a concave shape when viewed from the direction of the central axis C3 of the standpipe 3. At least a portion of the main surface 61 is a portion of the main surface 61 on the third end 6c side. In other words, the main surface 61 has a concave shape at the third end 6c. When viewed from the direction of the central axis C3 of the standpipe 3, the radius of curvature of at least a portion of the main surface 61 (the third end 6c) is equal to or smaller than the radius of curvature of the inner circumferential surface 30a of the standpipe 3. This reduces pressure loss in the protruding member 6.

[0124] As shown in FIGS. 10 to 14, the main surface 61 has a concave shape at the third end 6c but a convex shape at the fourth end 6d. That is, the shape of the main surface 61 as viewed from the direction of the central axis C3 of the standpipe 3 changes from a concave shape to a convex shape from the third end 6c to the fourth end 6d. This facilitates flow along the main surface 61 of the protruding member 6. In this embodiment, as shown in FIG. 14, the shape of the main surface 61 as viewed from the direction of the central axis C3 of the standpipe 3 is convex at the top 6e. The shape of the main surface 61 as viewed from the direction of the central axis C3 of the standpipe 3 is convex in the range from the top 6e to the fourth end 6d. In this embodiment, the protruding member 6 has a flat portion 6f between the third end 6c and the top 6e. As shown in FIG. 13, at the flat portion 6f, the main surface 61 has a planar shape as viewed from the direction of the central axis C3 of the standpipe 3.

[0125] In the concave area of ​​the main surface 61, the center of the concave shape of the main surface 61, i.e., the lowest part of the concave shape, is located closer to the center than the ends in the width direction of the protrusion member 6. In the convex area of ​​the main surface 61, the center of the convex shape of the main surface 61, i.e., the highest part of the convex shape, is located closer to the center than the ends in the width direction of the protrusion member 6. In this embodiment, the center of the convex shape of the main surface 61 coincides with the center of the protrusion member 6 in the width direction.

[0126] As can be seen from FIGS. 10 to 15, the shapes of the first side surface 62 and the second side surface 63 when viewed from the direction of the central axis C3 of the standpipe 3 change along the direction of the central axis C3 of the standpipe 3.

[0127] 10 and 12, when viewed from the direction of the central axis C3 of the vertical pipe 3, at least a portion of the first side surface 62 has a concave shape. At least a portion of the first side surface 62 is a portion of the first side surface 62 on the third end 6c side. In other words, the first side surface 62 has a concave shape at the third end 6c. This reduces pressure loss in the protruding member 6.

[0128] 10 and 12, at least a portion of the second side surface 63 has a concave shape when viewed from the direction of the central axis C3 of the vertical pipe 3. At least a portion of the second side surface 63 is a portion of the second side surface 63 on the third end 6c side. In other words, the second side surface 63 has a concave shape at the third end 6c. This reduces pressure loss in the protruding member 6.

[0129] The shape of the first side surface 62 when viewed from the direction of the central axis C3 of the upright pipe 3 remains concave from the third end 6c to the fourth end 6d. As can be seen from Figures 14 and 15, the depth of the concave shape of the first side surface 62 becomes shallower from the apex 6e to the fourth end 6d. This allows the flow F2 along the first side surface 62 to smoothly merge with the flow F1 along the main surface 61 on the downstream side of the protrusion member 6.

[0130] The shape of the second side surface 63 when viewed from the direction of the central axis C3 of the standpipe 3 remains concave from the third end 6c to the fourth end 6d. As can be seen from Figures 14 and 15, the depth of the concave shape of the second side surface 63 becomes shallower from the top 6e to the fourth end 6d. This allows the flow F3 along the second side surface 63 to smoothly merge with the flow F1 along the main surface 61 on the downstream side of the protrusion member 6.

[0131] 8, the first side surface 62 and the second side surface 63 of the protrusion member 6 are symmetrical with respect to the center line of the protrusion member 6 that is along the central axis C3 of the standpipe 3. This can improve the flow rate.

[0132] As shown in FIG. 8 , the width of the protruding member 6 varies along the central axis C3 of the upright pipe 3. The width of the protruding member 6 refers to the width of the portion of the protruding member 6 closest to the inner circumferential surface 30a of the upright pipe 3. In this embodiment, the width of the protruding member 6 corresponds to the width of the first surface 60a of the protruding member 6. The protruding member 6 has a first variation portion 6g, where the direction of the width variation changes, and a second variation portion 6h, between the third end 6c and the fourth end 6d. The first variation portion 6g is located between the third end 6c and the apex 6e, more specifically, the flat portion 6f. The second variation portion 6h is located between the apex 6e and the fourth end 6d. The width of the protruding member 6 increases monotonically from the third end 6c to the first variation portion 6g. The width of the protruding member 6 decreases monotonically from the first variation portion 6g to the second variation portion 6h. The width of the protruding member 6 increases monotonically from the second variation portion 6h to the fourth end 6d. The width of the protruding member 6 is largest at the first transition portion 6g. The width of the protruding member 6 at the first transition portion 6g is the maximum dimension of the first surface in a second direction perpendicular to the first direction in which the first surface 60a and the second surface 60b of the protruding member 6 face each other. The width of the protruding member 6 at the first transition portion 6g is, for example, 50 mm or more and 100 mm or less. For example, the width of the protruding member 6 at the first transition portion 6g is 60 mm when the inner diameter of the standpipe 3 corresponds to a nominal diameter of 75 mm, 78 mm when the inner diameter of the standpipe 3 corresponds to a nominal diameter of 100 mm, and 96 mm when the inner diameter of the standpipe 3 corresponds to a nominal diameter of 125 mm. This facilitates the process of fixing the protruding member to the straight pipe with adhesive. As shown in FIG. 10, the maximum width of the protruding member 6 (the width at the first transition portion 6g) as viewed from the direction of the center axis C3 of the standpipe 3 is designated W1. If the inner diameter of the riser pipe 3 is d, then 0.38d≦W1≦1.00d, preferably 0.50d≦W1≦0.90d. If the maximum value of the distance between the first separation wall 64 and the second separation wall 65 as viewed from the direction of the central axis C3 of the riser pipe 3 is W2, then 0.3d≦W2≦0.7d, i.e. W2≦W1.

[0133] The width of the main surface 61 narrows from the third end 6c to the fourth end 6d, at least from the third end 6c to the apex 6e. This configuration allows the flows F2 and F3 along the first side surface 62 and the second side surface 63 to smoothly merge with the flow F1 along the main surface 61 on the downstream side of the protruding member 6. In this embodiment, the width of the main surface 61 decreases monotonically from the third end 6c to the fourth end 6d.

[0134] The first side surface 62 includes a portion whose width increases from the third end 6c toward the fourth end 6d. More specifically, the portion of the first side surface 62 on the third end 6c side increases in width from the third end 6c toward the fourth end 6d. This configuration can reduce pressure loss. In this embodiment, the portion of the first side surface 62 on the third end 6c side includes the portion of the first side surface 62 from the third end 6c to the flat portion 6f.

[0135] The second side surface 63 includes a portion whose width increases from the third end 6c toward the fourth end 6d. More specifically, the portion of the second side surface 63 on the third end 6c side increases in width from the third end 6c toward the fourth end 6d. This configuration can reduce pressure loss. In this embodiment, the portion of the second side surface 63 on the third end 6c side includes the portion of the second side surface 63 from the third end 6c to the flat portion 6f.

[0136] The first separation wall 64 and the second separation wall 65 are formed on a part of the protrusion member 6, not on the entirety, in the direction of the central axis C3 of the standpipe 3. More specifically, the first separation wall 64 and the second separation wall 65 exist within a predetermined range from the third end 6c along the direction of the central axis C3 of the standpipe 3. The predetermined range is the range from the third end 6c to the flat portion 6f.

[0137] The distance between the first separation wall 64 and the second separation wall 65 becomes shorter from the third end 6c toward the fourth end 6d. This configuration separates the flows F2 and F3 along the first and second side faces 62 and 63 from the flow F1 along the main surface 61 on the upstream side of the protrusion member 6, and allows the flows F2 and F3 along the first and second side faces 62 and 63 to smoothly merge with the flow F1 along the main surface 61 on the downstream side of the protrusion member 6.

[0138] The heights of the first separation wall 64 and the second separation wall 65 decrease from the third end 6c toward the fourth end 6d. This configuration separates the flows F2 and F3 along the first and second side faces 62 and 63 from the flow F1 along the main surface 61 on the upstream side of the protrusion member 6, and allows the flows F2 and F3 along the first and second side faces 62 and 63 to smoothly merge with the flow F1 along the main surface 61 on the downstream side of the protrusion member 6.

[0139] See Figure 14. When viewed from the direction of the central axis C3 of the vertical pipe 3, the distance between the top 6e of the protruding member 6 and the second wall surface 30c is defined as D1. It is preferable that the protruding member 6 has a relationship of 0.60d≦D1≦0.95d. This can further reduce the occurrence of pressure loss due to separation downstream from the second bent pipe 52. Therefore, the flow rate can be improved while enabling miniaturization.

[0140] The height of the top 6e of the protruding member 6 as viewed from the direction of the central axis C3 of the vertical pipe 3 is defined as H1. H1=d-D1. It is preferable that the protruding member 6 has a height of 0.05d≦H1≦0.40d. This can further reduce the occurrence of pressure loss due to separation downstream from the second bent pipe 52. Therefore, the flow rate can be improved while enabling miniaturization.

[0141] The maximum flow cross-sectional area of ​​the vertical pipe 3 is defined as A. The maximum flow cross-sectional area A can be calculated from the inner diameter d of the vertical pipe 3. In other words, A = π(d / 2) 2The cross-sectional area of ​​the protruding member at the top 6e is defined as A1. In the protruding member 6, it is preferable that A1 / A≦0.5, and more preferably that A1 / A≦0.4. This can further reduce the occurrence of pressure loss due to separation downstream from the second bent pipe 52. Therefore, the flow rate can be improved while enabling miniaturization. The minimum value of the flow path cross-sectional area in the piping member 10 is defined as A2. A2 is the flow path cross-sectional area at the top 6e of the protruding member 6. A2 is A−A1. In the protruding member 6, it is preferable that 0.5≦A2 / A<1, and more preferably that 0.6≦A2 / A<1. This can further reduce the occurrence of pressure loss due to separation downstream from the second bent pipe 52. Therefore, the flow rate can be improved while enabling miniaturization.

[0142] As described above, the protrusion member 6 has an end surface 68 at the fourth end 6d. FIG. 28 is a comparison diagram between the protrusion member 6 according to this embodiment and a protrusion member 600 that does not have the end surface 68. The protrusion member 600 is identical to the protrusion member 6 except that it does not have the end surface 68. When viewed in the width direction of the protrusion member 600, the fourth end 6d of the protrusion member 600 has a tapered shape. At the fourth end 6d, the height of the protrusion member 600 becomes zero. From FIG. 28, it can be seen that the protrusion member 6 has a shape obtained by cutting the portion of the protrusion member 600 on the fourth end 6d side in a direction perpendicular to the central axis C3 of the standpipe 3. The height of the protrusion member 6 decreases monotonically from the apex 6e to the protruding portion 6i. If the length of the protrusion member 6 were extended downstream, the protrusion member 6 would have a hypothetical portion where the height of the protrusion member 6 becomes zero. This portion where the height of the protrusion member 6 becomes zero may correspond to the fourth end 6d of the protrusion member 600.

[0143] The dimension of the protrusion member 6 in the direction of the central axis C3 of the vertical pipe 3 can be made smaller than that of the protrusion member 600. In particular, the protrusion member 6 has a shape in which the portion of the protrusion member 600 on the side of the fourth end 6d that protrudes from the straight pipe 32 to the outside is cut off. In other words, when the protrusion member 600 is placed in the straight pipe 32, the portion of the protrusion member 600 on the side of the fourth end 6d protrudes outward from the second end of the straight pipe 32. The fourth end 6d of the protrusion member 600 is thin and therefore easily damaged. Therefore, when the protrusion member 600 is placed in the straight pipe 32, there is a possibility that the protrusion member 600 will be damaged during transportation, etc.

[0144] In contrast, the protruding member 6 has an end face 68, and the position of the end face 68 is set so that the protruding member 6 is contained within the straight pipe 32 in the direction of the central axis C3 of the vertical pipe 3, as shown in FIG. 6. In this embodiment, the length of the protruding member 6 (the distance between the third end 6c and the fourth end 6d) is shorter than the length of the straight pipe 32. That is, in the piping member 10, the entire protruding member 6 is located within the straight pipe 32. This allows the protruding member 6 to be protected by the straight pipe 32, compared to when the protruding member 6 is partially protruding from the straight pipe 32. This reduces the possibility of damage to the protruding member 6, etc.

[0145] The protrusion member 6 has the advantage that the dimension in the direction of the central axis C3 of the upright pipe 3 can be made smaller than that of the protrusion member 600, and breakage can be prevented. Such a change in shape between the protrusion member 6 and the protrusion member 600 can also cause a change in pressure loss. Therefore, the change in pressure loss caused by the difference in shape between the protrusion member 6 and the protrusion member 600 was evaluated. Figure 29 is a graph showing the change in pressure loss due to the protrusion member 6 compared to the protrusion member 600.

[0146] 29, the vertical axis represents pressure loss in the piping member. The horizontal axis represents length percentage [%]. The length percentage [%] is the percentage of the distance from the apex 6e to the fourth end 6d of the protrusion member 6 relative to the distance from the apex 6e to the fourth end 6d of the protrusion member 600.

[0147] In Figures 6 and 28, the distance between the third end 6c and the fourth end 6d of the protruding member 6 in the direction of the central axis C3 of the standpipe 3 is represented by L'. The distance between the top 6e and the fourth end 6d of the protruding member 6 in the direction of the central axis C3 of the standpipe 3 is represented by L2'. In Figure 28, the distance between the third end 6c and the fourth end 6d of the protruding member 600 in the direction of the central axis C3 of the standpipe 3 is represented by L. The distance between the top 6e and the fourth end 6d of the protruding member 600 in the direction of the central axis C3 of the standpipe 3 is represented by L2. The distance between the fourth end 6d of the protruding member 6 and the fourth end 6d of the protruding member 600 in the direction of the central axis C3 of the standpipe 3 is represented by ΔL. L2 = L2' + ΔL, and L = L' + ΔL. The length percentage [%] is calculated by L2' / L2 x 100.

[0148] In FIG. 29, a length ratio of 100% indicates that the shape of the protrusion member 6 is identical to that of the protrusion member 600. A length ratio of 0% indicates that the shape of the protrusion member 6 extends from the third end 6c to the apex 6e. The height of the protrusion member 6 decreases monotonically from the apex 6e to the fourth end 6d. Therefore, as the length ratio decreases, the height of the protrusion member 6 at the fourth end 6d increases. From FIG. 29, it can be seen that the effect of reducing pressure loss decreases as the length ratio decreases. However, the relationship between the length ratio and pressure loss is not linear; pressure loss increases exponentially with a decrease in the length ratio. In other words, the increase in pressure loss with a decrease in the length ratio is relatively gradual. In other words, it can be said that the decrease in the effect of reducing pressure loss with a decrease in the length ratio is limited. Taking these points into consideration, L2' is set to satisfy the following condition. That is, if the height of the protrusion member 6 at the top 6e is H1 and the height of the protrusion member 6 at the fourth end 6d is H2, then 0.05H1≦H2≦0.90H1 holds. This allows for an improvement in flow rate while still enabling miniaturization. In particular, the length of the protrusion member 6 can be made shorter than that of the protrusion member 600. This allows for a reduction in the size of the protrusion member 6. Furthermore, compared to the protrusion member 600, the protrusion member 6 has fewer thin portions on the downstream side of the protrusion member 6, which may reduce the possibility of breakage of the protrusion member 6.

[0149] Here, it is preferable that the relationship between the protrusion member 600 and the height L satisfies 0.5d≦L≦5.0d. This can further reduce pressure loss due to separation downstream from the second bent pipe 52. Therefore, the flow rate can be improved while still enabling miniaturization. As described above, L=L1+L2'+ΔL. If the reduction in height per unit length of the protrusion member 600 from the apex 6e to the fourth end 6d is constant, then (H1-H2) / L2'=H2 / ΔL. In other words, ΔL=H2 / (H1-H2)×L2'. Therefore, the equation 0.5d≦L≦5.0d can be rewritten using L1 and L2' as 0.5d≦L1+H1 / (H1-H2)×L2'≦5.0d. Therefore, in the protrusion member 6, if the inner diameter of the straight pipe 32 is d, the distance between the third end 6c and the top 6e in the direction of the central axis C3 of the straight pipe 32 is L1, and the distance between the top 6e and the fourth end 6d in the direction of the central axis C3 of the straight pipe 32 is L2', then it is preferable that 0.5d≦L1+H1 / (H1-H2)×L2'≦5.0d.

[0150] [1.1.2 Effects, etc.] The piping member 10 described above comprises a joint (second bent pipe 52) having a first socket (socket 521) and a second socket (socket 522) that faces in a different direction from the first socket, a straight pipe 32 that is connected to the socket 521 of the second bent pipe 52, and a protruding member 6 that is located on the socket 522 side of the straight pipe 32 and that partially reduces the flow path cross-sectional area of ​​the straight pipe 32. The second bent pipe 52 and the straight pipe 32 are joined together. This configuration enables miniaturization while improving the flow rate and reducing installation errors.

[0151] In the piping member 10, the joint (second bent pipe 52) has a curved pipe portion 520. The first and second sockets (sockets 521, 522) are provided at both ends of the curved pipe portion 520. This configuration can improve the flow rate while enabling miniaturization and reducing installation errors.

[0152] In the piping member 10, the straight pipe 32 has a mark 3d on the outer circumferential surface of the straight pipe 32 that indicates the position of the protruding member 6 relative to the joint (second bent pipe 52). This configuration makes it easy to position the protruding member 6 at a desired position (position on the socket 522 side) relative to the second bent pipe 52.

[0153] In the piping member 10, the mark 3d is located on a portion of the outer peripheral surface of the straight pipe 32 that is not covered by the first socket (the socket 521). This configuration makes it easier to position the protruding member 6 at a desired position (the position on the socket 522 side) relative to the second bent pipe 52.

[0154] In the piping member 10, the length of the straight pipe 32 is 1.0 m or less. The protruding member 6 does not protrude outward from the straight pipe 32 from the end of the straight pipe 32 opposite the joint (second bent pipe 52). This configuration can improve the portability of the piping member 10 and further reduce the possibility of the protruding member 6 being damaged when the piping member 10 is transported.

[0155] In the piping member 10, the protruding member 6 is separate from the straight pipe 32. The protruding member 6 has a first surface 60a facing the inner circumferential surface 30a of the straight pipe 32, and a second surface 60b opposite the first surface 60a that acts on the fluid flowing through the straight pipe 32. The protruding member 6 and the straight pipe 32 are integrally joined. This configuration reduces the likelihood of the protruding member 6 falling off or being left unattached.

[0156] In the piping member 10, the protruding member 6 has an upstream end (third end 6c) facing the joint (second bent pipe 52), a downstream end (fourth end 6d) facing the opposite side from the joint (second bent pipe 52), and a top portion 6e located between the upstream end (third end 6c) and the downstream end (fourth end 6d) and minimizing the flow path cross-sectional area of ​​the straight pipe 32. This configuration can improve the flow rate while enabling miniaturization.

[0157] 1.2 Second Embodiment [1.2.1 Configuration] 30 is a schematic diagram of a piping system 1A according to embodiment 2. The piping system 1A includes an eaves gutter 2, a vertical pipe 3A, a horizontal pipe 4, a first bent pipe 51, a second bent pipe 52, a protruding member 6, and a drain 7.

[0158] The standpipe 3A has a straight pipe shape. Unlike the standpipe 3, the standpipe 3A is made up of a single pipe material rather than multiple pipe materials. Like the standpipe 3, the standpipe 3A has a pair of holes 3c and a mark 3d.

[0159] In this embodiment, the second bent pipe 52, the vertical pipe 3A, and the protruding member 6 constitute a piping member 10A.

[0160] 31 is a cross-sectional view of the piping member 10A. The protruding member 6 is located on the side of the socket 522 in the standpipe 3A connected to the socket 521 of the joint (second bent pipe 52) having a first socket (socket 521) and a second socket (socket 522) oriented in a different direction from the first socket, and partially reduces the flow path cross-sectional area of ​​the standpipe 3A. The protruding member 6 is arranged so that at least a portion of the standpipe 3A is a straight pipe. In this embodiment, the at least a portion of the standpipe 3A is the entire standpipe 3A. In other words, the piping member 10A is configured by the entire standpipe 3A, not just a portion of it.

[0161] [1.2.2 Effects, etc.] The piping member 10A described above includes a joint (second bent pipe 52) having a first socket (socket 521) and a second socket (socket 522) that faces in a different direction from the first socket, a straight pipe (standby pipe 3A) that is connected to the socket 521 of the second bent pipe 52, and a protruding member 6 that is located on the socket 522 side of the standby pipe 3A and partially reduces the flow path cross-sectional area of ​​the standby pipe 3A. The second bent pipe 52 and the standby pipe 3A are integrally joined. This configuration enables miniaturization while improving the flow rate and reducing installation errors.

[0162] 1.3 Third Embodiment 1.3.1 Configuration 32 is a schematic diagram of a piping system 1B according to embodiment 3. The piping system 1B includes an eaves gutter 2, a vertical pipe 3, a horizontal pipe 4, a first bent pipe 51, a tee 53, a protruding member 6, a drain 7, and a vertical pipe 8.

[0163] The riser pipe 8 defines a vertical flow path. The riser pipe 8 is located upstream of the riser pipe 3. The upstream end of the riser pipe 8 can be connected to another inlet, for example, higher than the inlet 2b. The downstream end of the riser pipe 8 is connected to the upstream end 3a of the riser pipe 3 via a tee 53. The riser pipe 8 is straight. The cross section perpendicular to the central axis of the riser pipe 8 is circular. The riser pipe 8 is arranged so that the central axis of the riser pipe 8 coincides with the up-down direction (vertical direction). For example, the material of the riser pipe 8 is rigid polyvinyl chloride. The dimensions of the riser pipe 8, such as the outer diameter and thickness, may be set in accordance with the standard for rigid polyvinyl chloride pipes (general) in JIS K 6741 "Rigid Polyvinyl Chloride Pipe."

[0164] Tee 53 is a joint that interconnects standpipe 3, horizontal pipe 4, and standpipe 8. Tee 53 has a first socket 531, a second socket 532, a third socket 533, and a junction 530. First socket 531, second socket 532, third socket 533, and junction 530 are formed as a continuous, integrated unit. The material of Tee 53 is, for example, hard polyvinyl chloride.

[0165] The first socket 531, the second socket 532, and the third socket 533 face in different directions. More specifically, the first socket 531 and the third socket 533 face in opposite directions. The central axis of the second socket 532 intersects with the central axes of the first socket 531 and the third socket 533. In FIG. 32 , the first socket 531 faces downward, the second socket 532 faces sideways, and the third socket 533 faces upward. The angle between the central axis of the first socket 531 and the central axis of the second socket 532 is equal to or less than 90°, and is set to 88.83°, for example.

[0166] Junction 530 merges the flow path from second receiver 532 with the flow path from third receiver 533 and directs the fluid toward first receiver 531. Therefore, Tee 53 merges the fluid that has flowed in from second receiver 532 with the fluid that has flowed in from third receiver 533, and causes the fluid to flow out from first receiver 531.

[0167] The first socket 531 is connected to the upstream end 3a of the standpipe 3. The second socket 532 is connected to the downstream end 4b of the horizontal pipe 4. The third socket 533 is connected to the downstream end of the standpipe 8.

[0168] Piping system 1B includes tee 53. At tee 53, the flow path changes direction from second receiving port 532 to first receiving port 531. When the flow path changes direction, pressure loss due to separation can be one factor in a decrease in flow rate. Therefore, protruding member 6 is provided to reduce the decrease in flow rate due to pressure loss caused by tee 53.

[0169] The protruding member 6 is located downstream of the cheese 53. More specifically, the protruding member 6 is located on the second receiving port 532 side in the standpipe 3, which is a straight pipe section downstream of the cheese 53, and is used to partially reduce the flow path cross-sectional area of ​​the standpipe 3.

[0170] In this embodiment, the tee 53, the upright pipe 3, and the protruding member 6 constitute the piping member 10B.

[0171] 32 is a cross-sectional view of the piping member 10B. The protruding member 6 is located on the second socket 532 side of a straight pipe 32 connected to a first socket 531 of a joint (tee 53) having a first socket 531 and a second socket 532 oriented in a different direction from the first socket 531, and partially reduces the flow path cross-sectional area of ​​the straight pipe 32. The protruding member 6 is arranged so that at least a portion of the standpipe 3 is a straight pipe. In this embodiment, at least a portion of the standpipe 3 is a straight pipe 32.

[0172] [1.3.2 Effects, etc.] In the piping member 10B described above, the joint (tee 53) has a third socket 533 facing the opposite side to the first socket 531, and a junction section 530 that merges the flow path from the second socket 532 into the flow path from the third socket 533 and directs the flow path toward the first socket 531. This configuration can reduce pressure loss in the tee 53 and improve the flow rate.

[0173] [2. Modifications] The embodiments of the present disclosure are not limited to the above-described embodiments 1 to 3. The above-described embodiments 1 to 3 can be modified in various ways depending on the design, etc., as long as the object of the present disclosure can be achieved. Modifications of the above-described embodiments 1 to 3 are listed below. The modifications described below can be applied in appropriate combinations.

[0174] In the following, although the present invention is applicable to any of embodiments 1 to 3, reference will be made to embodiment 1. However, this is merely to simplify the description and is not intended to exclude application to embodiments 2 and 3.

[0175] In one modified example, the piping member 10 may further include a connection fitting 33 that is connected to the straight pipe 32 on the side opposite to the fitting (second bent pipe 52). The connection fitting 33 may be integrally joined to the straight pipe 32. Similarly, the piping member 10B may further include a connection fitting 33 that is connected to the straight pipe 32 on the side opposite to the fitting (tee 53). The connection fitting 33 may be integrally joined to the straight pipe 32. In this way, the piping members 10, 10B may be provided in advance with a connection fitting 33 for connecting another pipe material (e.g., the straight pipe 31) to the straight pipe 32. This eliminates the need to attach the connection fitting 33 when installing the piping member 10, thereby reducing the effort required for installing the piping member 10.

[0176] In one modified example, the protruding member 6 may be formed integrally with the straight pipe 32, rather than being separate from the straight pipe 32.

[0177] In one modified example, the protruding member 6 may not have an end surface 68. For example, the fourth end 6d of the protruding member 6 may be tapered when viewed in the width direction of the protruding member 6. This is the same configuration as the protruding member 600 shown in FIG. 28. In this case, the distance between the top 6e and the fourth end 6d in the direction of the central axis C3 of the standpipe 3 is defined as L2. L2 may be L2 = L - L1, and preferably L2 > L1. This can further reduce pressure loss due to separation downstream from the second bent pipe 52. Therefore, the flow rate can be improved while still enabling miniaturization. Furthermore, if the inner diameter of the standpipe 3 is d and the distance between the third end 6c and the fourth end 6d in the direction of the central axis C3 of the standpipe 3 is L, then 0.5d ≦ L ≦ 5.0d may be satisfied. This can improve the flow rate.

[0178] In one variation, the protruding member 6 may not have the protrusion 6i.

[0179] In one variation, the second direction may correspond to the height of the protrusion member 6. That is, in the protrusion member 6, the first portion 610 may be configured as an upstream portion, and the second portion 620 may be configured as a downstream portion, which are separate members.

[0180] In one modified example, the protruding member 6 does not necessarily have to have an outer shape that is mirror-symmetrical with respect to a plane perpendicular to the second direction.

[0181] In one variation, the first portion 610 may not occupy the half of the protruding member 6 on the first end 6a side. The second portion 620 may not occupy the half of the protruding member 6 on the second end 6b side.

[0182] In one variation, the position of the protrusion 6i is not limited to the fourth end 6d, but may be between the apex 6e and the fourth end 6d. In one variation, the protrusion member 6 may have a plurality of protrusions 6i between the apex 6e and the fourth end 6d. The protrusions 6i may be formed integrally with the protrusion member 6, or may be formed separately and attached thereto.

[0183] In one modified example, the first side surface 62 and the second side surface 63 of the protrusion member 6 may have a shape that is asymmetric with respect to the center line of the protrusion member 6 along the central axis C3 of the standpipe 3. The shapes of the first side surface 62 and the second side surface 63 may be set individually depending on the installation environment of the piping system 1 or the piping member 10, and do not necessarily have to be a shape that is symmetric with respect to the center line of the protrusion member 6 along the central axis C3 of the standpipe 3.

[0184] In one variant, the protruding member 6 does not necessarily have to have an end surface 66 .

[0185] In one modified example, the shape, number, and arrangement of the protrusions 67 of the protrusion member 6 may be changed as appropriate depending on the shape, number, and arrangement of the holes 3c of the standpipe 3. For example, the first portion 67a and the second portion 67b of the protrusion 67 may also serve as gates when forming the first portion 610 and the second portion 620 of the protrusion member 6 by injection molding. The holes 3c may be cutouts. The position of the holes 3c is not limited to the upstream end portion 3a. The protrusions 67 and the holes 3c are preferably provided so as to facilitate positioning of the protrusion member 6 relative to the standpipe 3. However, the protrusion member 6 does not necessarily have to have the protrusions 67.

[0186] In one variant, the protruding member 6 does not have to be entirely contained within the riser pipe 3. In particular, the fourth end 6d of the protruding member 6 may protrude from the riser pipe 3 to the outside.

[0187] In one modified example, the shape and size of part or all of the piping system 1 may be different from those of the above embodiment. For example, unlike the above embodiment, in the piping system 1, the shapes of the first and second bent pipes 51 and 52, the vertical pipe 3, and the horizontal pipe 4 may be polygonal rather than circular.

[0188] In one variation, each of the first and second bent pipes 51, 52 may be selected from a 90° elbow (so-called DL) specified in JIS K 6739, a 90° large bend elbow (so-called LL), and a 45° elbow (so-called 45L) specified in JIS K 6739. The dimensions of the first and second bent pipes 51, 52 do not necessarily have to be set in accordance with the standard of JIS K 6739 "Rigid polyvinyl chloride pipe joints for drainage."

[0189] In one variant, the piping system 1 does not necessarily have to include the eaves gutter 2. For example, if the building 11 has a structure with a water collection port, such as a balcony, the first bent pipe 51 of the piping system 1 may be connected to the water collection port of the building 11.

[0190] In one modified example, the drain 7 may have a structure that is generally not considered to contribute to the occurrence or promotion of the siphoning phenomenon. In one modified example, the piping system 1 does not necessarily have to include the drain 7. The drain 7 is not an essential component of the piping system 1, and may be provided as appropriate taking into consideration the installation environment of the piping system 1, etc.

[0191] In one modified example, the piping system 1 is not limited to a gutter system, which is a type of drainage system, but may be other drainage systems such as a sewage system, or may be applied to a water supply system such as a drinking water system. In other words, the protrusion member or piping member can be used in a system that supplies water or drains water.

[0192] [3. Aspects] As is clear from the above-mentioned first to third embodiments and the modifications, the present disclosure includes the following aspects.

[0193] [Aspect 1] a coupling having a first socket and a second socket oriented differently from the first socket; a straight pipe to be connected to the first socket of the joint; a protruding member located on the second receiving port side in the straight pipe and configured to partially reduce a flow path cross-sectional area of ​​the straight pipe; Equipped with The joint and the straight pipe are integrally joined. Piping components.

[0194] [Aspect 2] The joint has a bent pipe portion, The first socket and the second socket are provided at both ends of the curved pipe portion, respectively. The piping member of embodiment 1.

[0195] [Aspect 3] The joint is a third socket facing the opposite side to the first socket; a confluence portion that merges a flow path from the second receiving port into a flow path from the third receiving port and directs the flow path toward the first receiving port; having The piping member of embodiment 1.

[0196] [Aspect 4] Further provided is a connection joint connected to the straight pipe on the opposite side of the joint, The connection joint is integrally connected to the straight pipe. The piping member according to any one of the first to third embodiments.

[0197] [Aspect 5] The straight pipe has a mark on an outer circumferential surface of the straight pipe that indicates the position of the protruding member relative to the joint. The piping member according to any one of the first to fourth embodiments.

[0198] [Aspect 6] The mark is located on a portion of the outer circumferential surface that is not covered by the first socket. The piping member of embodiment 5.

[0199] [Aspect 7] The length of the straight pipe is 1.0 m or less, the protruding member does not protrude outward from the straight pipe from the end of the straight pipe opposite the joint, The piping member according to any one of the first to sixth embodiments.

[0200] [Aspect 8] the protruding member is separate from the straight pipe, The protruding member is a first surface facing the inner circumferential surface of the straight pipe; a second surface opposite to the first surface that acts on the fluid flowing through the straight pipe; Equipped with The protrusion member and the straight pipe are integrally joined. The piping member according to any one of the first to seventh embodiments.

[0201] [Aspect 9] The protruding member is an upstream end facing the joint; a downstream end facing away from the coupling; a top portion between the upstream end and the downstream end, which makes the flow path cross-sectional area of ​​the straight pipe the smallest; Equipped with The piping member according to any one of the first to eighth embodiments.

[0202] Aspects 2 to 9 are optional and not essential. [Industrial Applicability]

[0203] The present disclosure is applicable to piping members, particularly to piping members for changing the direction of a flow path. [Explanation of symbols]

[0204] 10, 10A, 10B Piping components 3,3A vertical pipe (straight pipe) 32 straight pipe 3d landmark 52 Second bent pipe (joint) 520 Bent pipe section 521 Underbit (first underbit) 522 Underbite (second underbite) 53 Cheese (joint) 530 Junction 531 First socket 532 Second socket 533 3rd underbite 6 Protruding parts 6c Third end (upstream end) 6d 4th end (downstream end) 6e top 60a Page 1 60b 2nd side

Claims

1. a coupling having a first socket and a second socket oriented differently from the first socket; a straight pipe to be connected to the first socket of the joint; a protruding member located in the straight pipe on the second receiving port side and configured to partially reduce a flow path cross-sectional area of ​​the straight pipe; Equipped with The joint and the straight pipe are integrally joined. Piping components.

2. The joint has a bent pipe portion, The first socket and the second socket are provided at both ends of the curved pipe portion, respectively. The piping member according to claim 1.

3. The joint is a third socket facing the opposite side to the first socket; a confluence portion that merges a flow path from the second receiving port into a flow path from the third receiving port and directs the flow path toward the first receiving port; having The piping member according to claim 1.

4. Further provided is a connection joint connected to the straight pipe on the opposite side of the joint, The connection joint is integrally connected to the straight pipe. The piping member according to claim 1.

5. The straight pipe has a mark on an outer circumferential surface of the straight pipe that indicates the position of the protruding member relative to the joint. The piping member according to claim 1.

6. The mark is located on a portion of the outer circumferential surface that is not covered by the first socket. The piping member according to claim 5.

7. The length of the straight pipe is 1.0 m or less, the protruding member does not protrude outward from the straight pipe from the end of the straight pipe opposite the joint, The piping member according to claim 1.

8. the protruding member is separate from the straight pipe, The protruding member is a first surface facing an inner circumferential surface of the straight pipe; a second surface opposite to the first surface that acts on the fluid flowing through the straight pipe; Equipped with The protrusion member and the straight pipe are integrally joined. The piping member according to claim 1.

9. The protruding member is an upstream end facing the joint; a downstream end facing away from the coupling; a top portion between the upstream end and the downstream end, which makes the flow path cross-sectional area of ​​the straight pipe the smallest; Equipped with The piping member according to claim 1.

Images