Piping structure, manufacturing method of piping structure, building, resin pipe, and manufacturing method of resin pipe

Abstract

To provide a piping structure capable of efficiently connecting a drainage member provided on the top surface of a floor structure to a resin piping arranged below the floor structure through a through hole formed in the floor structure.SOLUTION: There is provided a rainwater drainage piping 10 comprising: a siphon type rainwater drainage member 100 arranged on the upper surface of a floor structure 10S, a connecting short pipe 120 arranged in a through hole 10H formed in a floor slab 10S, and a resin piping 140. At the upper end of the connecting short pipe 120, an upper end screw 120A is formed, and a first screw portion 120A and a lower mounting screw 100B of the siphon type rainwater drainage member 100 are screwed together. The lower end of the connecting short pipe 120 projects downward from the lower surface of the floor slab 10S, and a lower end screw 120B is formed at the lower end and connected to a second mounting screw 140A of the resin piping 140.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a piping structure in which wastewater flows from a drainage member provided on the upper surface of a floor structure to a resin piping in a lower layer. [Background technology]

[0002] As is well known, when constructing large facilities such as factories and shopping centers, as buildings become more versatile and complex, it is common to form through holes in floor structures that make up roofs, balconies, etc. (for example, through holes using void pipes in floor slabs). In addition, a drainage member may be arranged on the upper surface of the floor structure of the upper layer, and water (rainwater, sewage, etc.) flowing into the drainage member may be drained to the lower layer via a pipe arranged in the through hole.

[0003] As such drainage members, various types are used, such as those equipped with a strainer and those having a rainfall control pipe arranged around them. Furthermore, as an example of a drainage member, a rainwater drainage device has been disclosed that is capable of efficiently draining rainwater by generating a siphon effect within a pipe (see, for example, Patent Document 1).

[0004] In addition, the drainage member is fixed to a floor structure such as a floor slab, and its lower end is placed in a through hole with piping connected to the downstream side.In cases where water (e.g., rainwater) flowing in from the drainage member placed on the upper surface of the floor slab is drained through the through hole to the lower level, the water distribution pipe may pass inside the building.

[0005] When a water distribution pipe passes inside a building, unlike gutters and the like that are installed outside the building, if water leaks from the water distribution pipe, the inside of the building will be flooded. Therefore, it is desirable to use plastic piping (e.g., olefin-based plastic pipes) that are highly earthquake-resistant and durable for the piping placed downstream of the drainage components. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2019-007135 A Summary of the Invention [Problem to be solved by the invention]

[0007] However, when the drainage member is formed of metal, such as a casting, the connection part such as the screw at the lower end of the drainage member is generally formed of metal, and it is difficult to directly connect the metal connection part and the resin pipe. Therefore, it is necessary to use an intermediate part including a metal part and a resin part that are pre-assembled at a factory, not at the construction site. As described above, when an olefin-based resin pipe is used as the resin pipe, it is necessary to use an electric fusion joint to connect the resin part of the intermediate part and the resin pipe, but since the electric fusion joint is provided with an electric terminal, it is not easy to install it in a through hole formed in a floor structure such as a floor slab.

[0008] Therefore, there is a demand for a piping structure that can efficiently connect a resin piping arranged below a floor structure to a drainage member provided on the upper surface of a floor structure, such as a floor slab such as a roof slab, via a through hole formed in the floor structure.

[0009] The present invention has been made in consideration of the above circumstances, and aims to provide a piping structure that can efficiently connect a drainage member provided on the upper surface of a floor structure to a resin piping arranged below the floor structure via a through hole formed in the floor structure. [Means for solving the problem]

[0010] In order to solve the above problems, the present invention proposes the following means. (1) A first aspect of the present invention is a piping structure comprising a drainage member placed on the upper surface of a floor structure, a connecting short pipe placed in a through hole formed in the floor structure and penetrating from the upper surface to the lower surface of the floor structure, and a resin piping connected to the lower end of the connecting short pipe, wherein water flowing in from the drainage member is circulated to the resin piping via the connecting short pipe, a first threaded portion is formed on the upper end of the connecting short pipe, and the first threaded portion is screwed into a first mounting screw formed on the lower part of the drainage member to attach the drainage member to the upper part of the connecting short pipe, and the lower end of the connecting short pipe protrudes downward from the lower surface of the floor structure, and a resin piping connection portion for connecting to the resin piping is formed.

[0011] According to the piping structure of the present invention, the lower end of the connecting short pipe protrudes downward from the underside of the floor structure, so that the first threaded portion formed on the upper end of the connecting short pipe and the first mounting screw formed on the lower part of the drainage member can be efficiently screwed together. In addition, the lower end of the connecting short pipe protrudes downward from the underside of the floor structure, and a resin pipe connecting part for connecting to the resin pipe is formed, so that the resin pipe connecting part and the resin pipe are efficiently connected. In other words, since the connecting part protrudes downward from the underside of the floor structure, even when an electric fusion joint is disposed at the connecting part, for example, a working space can be secured around the electric fusion joint. As a result, the drainage member arranged on the upper surface of the floor structure can be efficiently connected to the resin piping. Furthermore, by connecting a resin pipe (for example, an olefin-based resin pipe) to the downstream side of the drainage member, the earthquake resistance and durability of the piping structure are improved, and damage to the piping structure can be suppressed.

[0012] Here, the drainage members include, for example, various drainage members (e.g., siphon-type drainage members including siphon-type rainwater drainage members) that are installed (e.g., buried, driven in, etc.) on the upper surface of a floor structure to collect drainage water. The drainage member may also include a joint or the like used to form a first screw portion at the lower end of the drainage member body.

[0013] In addition, floor structures are defined as structures made of slabs or deck plates (including those with or without poured concrete), and include various configurations such as flooring and ceiling panels formed to separate upper and lower floors on rooftops, roofs, balconies, and indoors.

[0014] Here, the connection short pipe has a connection short pipe body formed, for example, from a metal or resin material, and a first screw portion formed from metal at the upper end of the connection short pipe body which can be connected to a drainage member, and a resin pipe connection portion formed at the lower end of the connection short pipe body for connecting to a resin pipe. Hereinafter, a connection short pipe whose main body is made of metal may be referred to as a metal connection short pipe, and a connection short pipe whose main body is made of a resin material may be referred to as a resin connection short pipe. Moreover, the first screw portion may be configured, for example, as either a male screw or a female screw, and any well-known piping screw can be used.

[0015] [Metal short connection pipe] In a metal connecting short pipe, a first metal screw portion can be formed directly on the upper end of the metal short pipe body, and this first screw portion can be connected to a first mounting screw formed on the drainage member.

[0016] [Connection part at the lower end of the metal short connection pipe (example)] On the other hand, since the metallic connecting short pipe cannot be directly connected to the resin piping main body (the piping main body portion formed from a resin material) that constitutes the resin piping, a connecting portion for connecting to the resin piping, as exemplified below, is formed on the lower end side of the connecting short pipe. (1) A threaded portion is formed on the lower end of a metal short connection pipe body. A threaded electric fusion joint is screwed onto this threaded portion. In a threaded electric fusion joint, a metal member on which a metal threaded portion (male thread, female thread) is formed is connected to one end of the joint portion (fusion tube portion) of the electric fusion joint. In this case, the joint portion of the threaded electric fusion joint is the connection portion on the lower end side. (2) The second metal screw portion (male screw, female screw) formed on the lower end side of the metal connecting short pipe serves as the connection portion on the lower end side of the connecting short pipe. In this case, restrictions are imposed on the resin pipe connected to the connection part. That is, a resin pipe is applied in which a metal threaded part (second attachment screw) is provided integrally with the resin pipe main body on the upper end side of the resin pipe main body. Here, when providing a metal threaded part (second attachment screw) on the upper end side of the resin pipe main body, the resin pipe main body may be joined (fused) to the joint part of the threaded electric fusion joint to provide a metal screw on the upper end side, or a metal member (socket, etc.) on which a metal screw is formed may be gripped by a mechanical means on the upper end of the resin pipe main body to provide a metal screw (second attachment screw).

[0017] [Resin short connection pipe] In addition, since it is difficult to directly connect the resin connection short pipe body formed of a resin material to the first mounting screw, a metal screw (first screw portion) is formed at the upper end as a constituent member of the resin connection short pipe and is integrally formed with the resin connection short pipe body. For example, in the case of a short pipe made of a hard resin material such as a polyvinyl chloride short pipe, the first thread may be formed directly on the resin short pipe body in the same manner as in the case of the above-mentioned metal short pipe.

[0018] [Connection part at the lower end of the plastic short connection pipe (example)] On the other hand, the resin connecting short pipe has a connecting portion formed at its lower end for connecting to a resin pipe, the example of which is given below. (1) The lower end of the resin short pipe body itself serves as a connection part for connecting to a resin pipe. In this case, for example, it is possible to join the resin short pipe and the resin pipe (resin pipe body) using an electric fusion joint or the like. (2) On the premise that a plastic pipe having a plastic pipe body and a first coupling member provided at the upper end of the plastic pipe body is connected to a connection part, a second coupling member connectable to the first coupling member is provided at the lower end of the plastic connection short pipe body, and this second coupling member serves as a connection part for connecting to the plastic pipe. The first coupling member and the second coupling member can be arbitrarily designed to be of a plug-in type, a butt-fit type, or the like. (3) A metal screw (second threaded portion) is provided at the lower end of the plastic connecting short pipe to serve as a connection portion for connecting to plastic piping. In this case, a metal screw (second mounting screw) is provided on the upper end of the resin pipe, and the second threaded portion and the second mounting screw are screwed together to connect the two. In addition, the metal screw (second screw portion) at the lower end of the plastic connection short pipe is formed integrally with the plastic connection short pipe body by joining a threaded electric fusion joint to the lower end of the plastic connection short pipe body, by gripping a metal member (socket, etc.) on which the metal screw is formed by mechanical means, etc. Moreover, the second mounting screw provided at the upper end of the resin pipe is similar to the second screw portion provided at the lower end of the resin connection short pipe. (4) A plastic screw (second threaded portion) is provided at the lower end of the plastic connecting short pipe to serve as a connection portion for connecting to plastic piping. In this case, a second mounting screw may be formed on the upper portion of the plastic pipe body, and the second screw portion of the connecting short pipe and the second mounting screw of the plastic pipe may be screwed together to connect them.

[0019] The resin pipe main body constituting the resin pipe may be configured to have, for example, a straight vertical pipe, or a curved portion such as a T-pipe or an elbow. The resin material constituting the resin piping can be selected from any material such as rigid polyvinyl chloride resin, ABS, AES, etc., but from the standpoint of earthquake resistance and durability, for example, it is preferable to use an olefin-based resin. Olefin resin pipes have a higher tensile breaking elongation when measured according to JIS K 6815-1 and JIS K 6815-3 than rigid polyvinyl chloride pipes; while rigid polyvinyl chloride pipes have a tensile breaking elongation of 50-150%, olefin resin pipes are 350% or more. In particular, when a PE100 high density polyethylene pipe is used using the extrapolation method specified in ISO / TR9080, the tensile breaking elongation is 500% or more, which helps to reduce damage caused by earthquakes. The olefin resin is not particularly limited, but examples thereof include polypropylene, polybutene, low-density polyethylene, high-density polyethylene, linear low-density polyethylene, atactic polypropylene, isotactic polypropylene, syndiotactic polypropylene, poly-α-olefin, and the like.

[0020] (2) In the piping structure described in (1) above, the first threaded portion may be a male thread.

[0021] According to the piping structure of the present invention, the first threaded portion is a male thread, so that the first threaded portion and the first mounting screw formed on the lower part of the drainage member can be easily and efficiently screwed together. In addition, the manufacturing cost of the short connection pipe can be reduced.

[0022] (3) In the piping structure described in (1) or (2) above, the resin pipe connection portion may be an electric fusion joint.

[0023] According to the piping structure of the present invention, since the resin pipe connecting portion is an electric fusion joint, the resin pipe can be easily and efficiently connected to the short connection pipe.

[0024] (4) In the piping structure described in (1) or (2) above, the resin piping connection portion may be constituted by a first coupling member, and a second coupling member connectable to the first coupling member may be disposed at an upper end of the resin piping.

[0025] According to the piping structure of the present invention, the resin piping connection portion is a first coupling member, and a second coupling member connectable to the first coupling member is formed at the upper end of the resin piping, so that the resin piping and the connecting short pipe can be connected easily and efficiently.

[0026] (5) In the piping structure described in (1) or (2) above, the resin pipe connection portion may be a second threaded portion, and a second mounting screw may be formed on an upper end of the resin pipe to screw into the second threaded portion.

[0027] According to the piping structure of the present invention, the plastic pipe connection portion is a second threaded portion, and a second mounting screw that screws into the second threaded portion is formed on the upper end of the plastic pipe. Therefore, the second threaded portion can be screwed into the second mounting screw at the upper end of the plastic pipe to easily and efficiently connect the connecting short pipe and the plastic pipe. Here, the configuration of the second threaded portion can be set arbitrarily within the range of known piping threads, and may be configured as either a male thread or a female thread, for example.

[0028] (6) In the piping structure according to any one of (1) to (5) above, the drainage member may be a siphon-type rainwater drainage member that allows rainwater to flow downward.

[0029] According to the piping structure of the present invention, when a siphon-type rainwater drainage member is applied as a drainage member, damage to the resin piping is suppressed even in the event of a heavy rainfall, and rainwater can be efficiently and stably discharged outside the building.

[0030] According to the piping structure of the present invention, since the second screw portion is a male screw, the second screw portion and the second mounting screw formed on the upper part of the resin pipe can be easily and efficiently screwed together, and the manufacturing cost of the connecting short pipe can be reduced. Effect of the Invention

[0031] According to the piping structure of the present invention, a drainage member provided on the upper surface of the floor structure can be efficiently connected to a resin piping arranged below the floor structure via a through hole formed in the floor structure. [Brief description of the drawings]

[0032] [Figure 1]FIG. 1 is a side view illustrating a schematic configuration of a piping structure according to a first embodiment of the present invention. [Diagram 2] FIG. 1 is a perspective view illustrating a schematic configuration of a piping structure according to a first embodiment. [Diagram 3] FIG. 1 is an exploded partial vertical cross-sectional view illustrating a schematic configuration of a piping structure according to a first embodiment. [Figure 4] FIG. 5 is an exploded partial vertical cross-sectional view illustrating a schematic configuration of a piping structure according to a second embodiment of the present invention. [Diagram 5] FIG. 11 is an exploded vertical cross-sectional view illustrating a schematic configuration of a piping structure according to a third embodiment of the present invention. [Figure 6] FIG. 11 is an exploded vertical cross-sectional view illustrating a schematic configuration of a piping structure according to a fourth embodiment of the present invention. [Figure 7] FIG. 11 is an exploded vertical cross-sectional view illustrating a schematic configuration of a piping structure according to a fifth embodiment of the present invention. [Figure 8] FIG. 13 is a perspective view illustrating a schematic configuration of a piping structure according to a sixth embodiment of the present invention. [Figure 9] FIG. 13 is a partial end view seen from the side, illustrating the schematic configuration of a siphon-type drainage member according to a sixth embodiment. [Figure 10] FIG. 13 is an exploded cross-sectional view seen from the side, illustrating the schematic configuration of a siphon-type drainage member according to a sixth embodiment. [Figure 11] FIG. 13 is an exploded perspective view illustrating a schematic configuration of a siphon-type drainage member according to a sixth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0033] First Embodiment Hereinafter, a piping structure according to a first embodiment of the present invention will be described with reference to Fig. 1 to Fig. 3. Fig. 1 is a side view illustrating a schematic configuration of the piping structure according to the first embodiment of the present invention, and Fig. 2 is a perspective view illustrating the schematic configuration of the piping structure. Also, Fig. 3 is an exploded partial vertical cross-sectional view illustrating the schematic configuration of the piping structure.

[0034] In Figures 1 to 3, symbol 10 indicates a rainwater drainage pipe (piping structure), symbol 100 indicates a siphon-type rainwater drainage member (drainage member), symbol 120 indicates a metal connecting short pipe (connecting short pipe), symbol 120A indicates an upper end screw (first screw portion), symbol 120B indicates a lower end screw (second screw portion), symbol 140 indicates a plastic pipe, symbol 141 indicates an electric fusion joint, symbol 140A indicates an upper mounting screw (second mounting screw) of the plastic pipe, symbol 10S indicates a roof slab (floor structure), and symbol 10H indicates a through hole formed in the roof slab 10S.

[0035] As shown in Figures 1 to 3, the rainwater drainage piping (piping structure) 10 includes, for example, a siphon-type rainwater drainage member (drainage member) 100 provided on the upper surface of a roof slab (floor structure) 10S, a metal connecting short pipe (connecting short pipe) 120, and a plastic pipe 140 positioned below the underside of the roof slab 10S and allowing the drainage water to flow downstream. The lower part of the siphon-type rainwater drainage member 100 and the upper part of the metallic connecting short pipe 120 are connected within a through hole 10H formed in the roof slab 10S. The rainwater drainage pipe 10 is configured to allow rainwater flowing in from the siphon-type rainwater drainage member 100 to flow through the metal connection short pipe 120 to the resin pipe 140.

[0036] In this embodiment, the rainwater drainage piping (piping structure) 10 is arranged between a roof slab 10S formed on the roof of a large facility such as a factory or shopping center, and a floor slab (floor structure) 15S formed below the roof slab 10S. The space between the roof slab 10S and the floor slab 15S is used as, for example, a maintenance space. Moreover, what is formed below (at the lower layer) the roof slab (floor slab) 10S is not limited to the floor slab (floor structure) 15S, but may be, for example, a deck plate, a ceiling panel, or the like.

[0037] The roof slab (floor structure) 10S is, for example, a floor slab formed on the roof of a building. In addition, a through hole 10H is formed in the roof slab 10S by using a void pipe, penetrating in the vertical direction from the upper surface to the lower surface.

[0038] The configuration of the roof slab (floor structure) 10S can be set arbitrarily, but in this embodiment, the roof slab 10S comprises, for example, a roof slab main body 11S, a waterproof layer 12S, and a surface finishing layer 13S, as shown in Figure 2. In addition, it is preferable that the roof slab 10S has a waterproof layer 12S formed on the upper surface of the roof slab main body 11S, and a surface finishing layer 13S formed on the upper surface of the waterproof layer 12S.

[0039] As shown in Figures 1 to 3, the siphon-type rainwater drainage member (drainage member) 100 includes, for example, a base plate portion 101 formed in a substantially circular shape with a circular hole opening in the center, a tubular portion 102 extending downward from the periphery of the circular hole of the base plate portion 101, a plurality of vertical ribs 103 formed integrally with the upper surface of the base plate portion 101 and rising upward, and a connection portion 105.

[0040] The base plate portion 101, the cylindrical portion 102, and the vertical ribs 103 are integrally formed by casting a metal material such as an aluminum alloy, cast iron, or stainless steel. Moreover, for example, the lower surface of the base plate portion 101 is installed (for example, buried) in the upper surface of the roof slab 10S. Moreover, the tubular portion 101 and the connecting portion 105 are disposed within a through hole 10H of the roof slab 10S. In addition, an asphalt waterproof sheet (not shown) is attached to the upper surface of the base plate portion 101, extending outward from the base plate portion 101. It is possible to determine whether or not to use a waterproof sheet, and a waterproof sheet or waterproofing means may be used instead of the asphalt waterproof sheet.

[0041] The connecting portion 105 is formed substantially integrally with the lower portion of the cylindrical portion 102 by fitting the cylindrical portion 102 onto the inner peripheral surface. As shown in Figs. 1 and 3, the connecting portion 105 has a lower mounting screw (first mounting screw) 100B formed of a female screw on its inner circumferential surface. A metallic short connection pipe 120 can be attached to the lower attachment screw 100B, and a communication hole 100H is formed inside the cylindrical portion 102 and the connection portion 105 along the vertical direction.

[0042] The vertical rib 103 is formed, for example, in a substantially U-shape in plan view, and is disposed so that the bottom of the U-shape faces the through hole 100H. In addition, the vertical rib 103 has, for example, a rising wall portion formed from the bottom of the U-shape toward the opening side, which extends radially from the center of the through hole 100H toward the radially outward direction, and the opposing rising wall portions in the U-shape are formed so that the spacing between them gradually increases toward the opening side (radially outward).

[0043] With this configuration, the siphon-type rainwater drainage member (drainage member) 100 suppresses the formation of a column of air near the center of the flowing-in rainwater (drainage), allowing the rainwater to flow efficiently by the siphon effect. The configuration of the siphon type rainwater drainage member (drainage member) 100 can be set arbitrarily.

[0044] The metal connection short pipe (connection short pipe) 120 is, for example, a straight metal pipe formed in a straight shape, as shown in Figures 1 and 3, and is installed downstream of the siphon-type rainwater drainage member 100.

[0045] Furthermore, the metal connection short tube 120 is formed, for example, from a metal such as brass, and has an upper end thread (first threaded portion) 120A consisting of a male thread formed at its upper end, and a lower end thread (second threaded portion) 120B consisting of a female thread formed at its lower end. Further, inside the metallic short connection pipe 120, a through hole 120H is formed along the pipe axis.

[0046] Further, the lower end of the metal connection short pipe 120 protrudes downward from the lower surface of the roof slab 10S, and the lower end screw (second screw portion) 120B is disposed in the space between the roof slab 10S and the floor slab 15S.

[0047] The length of the metal connecting short pipe 120 can be set arbitrarily taking into consideration the thickness of the roof slab (floor structure) 10S, etc., but it is preferable that it be 100 mm or more, and more preferably 200 mm or more.

[0048] In addition, the amount of protrusion of the metal connecting short pipe 120 from the underside of the slab 10S can be set arbitrarily taking into consideration the distance to the floor slab 15S (or ceiling panel, etc.) below, but it is preferable that it be, for example, 50 mm or more and 400 mm or less, and more preferable that it be 100 mm or more and 350 mm or less. Here, the amount of protrusion of the metallic connection short pipe (connection short pipe) 120 from the lower surface of the slab 10S refers to the total length of the connection short pipe protruding from the lower surface of the slab 10S.

[0049] As shown in Figures 1 and 3, the metal connecting short pipe 120 is connected to the siphon-type rainwater drainage member 100 by screwing the upper end screw (first screw portion) 120A into the lower mounting screw (first mounting screw) 100B of the tubular portion 105 of the siphon-type rainwater drainage member 100.

[0050] Furthermore, the upper end screw (first screw portion) 120A and the lower attachment screw (first attachment screw) 100B are screwed together, for example, after the siphon-type rainwater drainage member 100 is installed on the upper surface of the roof slab 10S. The portion where the upper end screw (first screw portion) 120A and the lower attachment screw (first attachment screw) 100B are screwed together is disposed inside the through hole 100H.

[0051] Further, the metallic short connection pipe 120 is connected to the resin pipe 140 on the downstream side, and is configured to discharge rainwater to the downstream side through the flow hole 120H. It is possible to arbitrarily set the material of the metal short pipe 140. Also, instead of the metal short pipe 140, a resin short pipe may be constructed by directly forming the first thread on a resin short pipe body made of a hard resin material such as a polyvinyl chloride short pipe.

[0052] In this embodiment, as shown in Figs. 1 to 3, the resin pipe 140 includes, for example, a T-shaped pipe (resin pipe main body, T-shaped joint) 141 and a threaded electric fusion joint 142, and a first cylindrical portion extending in the vertical direction of the T-shaped pipe (resin pipe main body) 141 is inserted into the joint of the threaded electric fusion joint 142 and joined by electric fusion, so that the T-shaped pipe 141 and the threaded electric fusion joint 142 are integrally formed. For example, the T-shaped pipe 141 and the threaded electric fusion joint 142 can be manufactured separately in a factory and transported separately to a construction site, and then assembled at the construction site. During assembly, the threaded electric fusion joint 142 can be screwed into the metal connection short pipe 120 first, and then the threaded electric fusion joint 142 can be electrically fused to the T-shaped pipe 141.

[0053] The T-shaped pipe (plastic piping main body) 141 is formed of a plastic material, and as shown in Figures 1 and 2, for example, below the first cylindrical portion, branch portions are formed which are perpendicular to the first cylindrical portion and open in opposite directions, and each branch portion is connected to a plastic horizontal pipe 152 by an electric fusion joint 151.

[0054] Here, the resin material constituting the T-shaped pipe (resin pipe body) 141 can be set arbitrarily, but in this embodiment, it is formed of, for example, an olefin-based resin. Forming the T-shaped pipe (resin pipe body) 141 using an olefin-based resin is preferable from the viewpoint of, for example, earthquake resistance and durability.

[0055] Olefin resin pipes have a higher tensile breaking elongation, measured in accordance with JIS K 6815-1 and JIS K 6815-3, than rigid polyvinyl chloride pipes; whereas rigid polyvinyl chloride pipes have a tensile breaking elongation of 50-150%, olefin resin pipes have a tensile breaking elongation of 350% or more. In particular, when a PE100 high density polyethylene pipe is used using the extrapolation method specified in ISO / TR9080, the tensile breaking elongation is 500% or more, making it less susceptible to damage from vibrations caused by earthquakes.

[0056] The olefin resin is not particularly limited, but examples thereof include polypropylene, polybutene, low-density polyethylene, high-density polyethylene, linear low-density polyethylene, atactic polypropylene, isotactic polypropylene, syndiotactic polypropylene, poly-α-olefin, and the like. Instead of the olefin resin, hard polyvinyl chloride resin, ABS, AES, or the like may be used.

[0057] The resin material for forming the resin horizontal pipe 152 can be set arbitrarily, but it may be made of the same resin material as the T-shaped pipe (resin piping main body) 141. The resin horizontal pipe 152 may be made of a different type of resin material from that of the T-shaped pipe (resin piping main body) 141.

[0058] The electric fusion joint 151 has a cylindrical joint with an electric heating wire for fusion arranged on the inner surface side, and an electric terminal arranged on the outer surface of the joint, and various well-known electric fusion joints can be used.

[0059] The threaded electrofusion joint 142 may be any of a variety of well-known threaded electrofusion joints. In this embodiment, the threaded electric fusion joint 142 has, for example, a cylindrical joint having an electric heating wire for fusion arranged on the inner surface side and an electrical terminal 142P arranged on the outer surface, and a metal member 143 is arranged on one end side (upper side) of this joint. Moreover, on one end side (upper side) of the metal member 143, an upper attachment screw (second attachment screw) 140A made of metal and consisting of a male thread is formed.

[0060] The upper attachment screw (second attachment screw) 140A is screwed into a lower end screw (second threaded portion) 120B formed on the metal short connection pipe 120, and the metal short connection pipe 120 and the resin pipe 140 are connected together. The wastewater flowing from the metal connection short pipe 120 is made to flow through the resin pipe 140.

[0061] The configuration of the resin pipe 140 can be set arbitrarily, and is not limited to a configuration in which a threaded electric fusion joint 142 is provided at the upper end of a resin pipe main body 141 consisting of a T-shaped pipe. A straight resin pipe extending in the up-down direction (vertical), a resin pipe main body consisting of a curved section such as an elbow, or a configuration in which connection members (screw members, couplings, etc.) are integrally arranged on the upper part of such a resin pipe main body may be used.

[0062] According to the rainwater drainage piping (piping structure) 10 of the first embodiment, after the siphon-type rainwater drainage member 100 is installed on the upper surface of the slab 10S, the upper end screw (first screw portion) 120A of the metal connecting short pipe 120 is screwed into the lower mounting screw (first mounting screw) 100B of the siphon-type rainwater drainage member 100, so that the siphon-type rainwater drainage member 100 and the metal connecting short pipe 120 can be connected efficiently and reliably. Furthermore, since a resin pipe using, for example, an olefin-based resin is connected to the downstream side of the siphon-type rainwater drainage member 100, this is preferable from the standpoint of earthquake resistance and durability.

[0063] Furthermore, according to the rainwater drainage piping 10, the lower end screw (second screw portion) 120B formed on the lower end of the metal connecting short pipe 120 protrudes downward from the underside of the slab floor 10S, so that the conductive terminal 142P of the threaded electric fusion joint 142 does not interfere with the through hole 10H, and the lower end screw 120B of the metal connecting short pipe 120 and the second mounting screw 140A of the plastic pipe 140 can be screwed together to connect the metal connecting short pipe 120 and the plastic pipe 140. As a result, the metallic short connection pipe 120 and the resin pipe 140 can be connected efficiently.

[0064] Furthermore, according to the rainwater drainage piping 10, the upper end screw (first screw portion) 120A of the metal connecting short pipe 120 is a male screw, so that the lower mounting screw (first mounting screw) 100B of the siphon-type rainwater drainage member 100 and the upper end screw (first screw portion) 120A can be easily and efficiently screwed together. Furthermore, by using a male thread for the upper end screw 120A, the manufacturing cost of the metallic short connection pipe 120 can be reduced.

[0065] <Second embodiment> Next, a second embodiment of the present invention will be described with reference to FIG. Fig. 4 is an exploded partial vertical cross-sectional view for explaining the schematic configuration of a piping structure according to a second embodiment of the present invention. In Fig. 4, reference numeral 20 denotes a rainwater drainage pipe (piping structure), reference numeral 220 denotes a metal connection short pipe (connection short pipe), reference numeral 220A denotes an upper end screw (first screw portion), reference numeral 220B denotes a lower end screw (second screw portion), reference numeral 240 denotes a resin pipe, and reference numeral 240A denotes an upper mounting screw (second mounting screw).

[0066] The rainwater drainage pipe (piping structure) 20 includes, for example, a siphon-type rainwater drainage member (drainage member) 100, a metal connection short pipe (connection short pipe) 220, and a resin pipe 240, as shown in FIG. The siphon type rainwater drainage member (drainage member) 100 is similar to that of the first embodiment, so it is given the same reference numerals as in the first embodiment and the description thereof will be omitted.

[0067] The metallic connection short pipe (connection short pipe) 220 is, for example, a metallic straight pipe formed in a straight line, as shown in FIG.

[0068] Furthermore, the metal connection short tube 220 is formed from a metal such as brass, and has an upper end thread (first threaded portion) 220A consisting of a male thread formed at its upper end, and a lower end thread (second threaded portion) 220B consisting of a male thread formed at its lower end.

[0069] Furthermore, the lower end of the metallic connection short pipe 220 protrudes downward from the lower surface of the roof slab 10S. Specifically, the lower end screw (second screw portion) 220B is disposed below the lower surface of the roof slab 10S.

[0070] The length of the metallic short connection pipe 220 and the amount of protrusion from the lower surface of the slab 10S are similar to those of the metallic short connection pipe 220, and therefore a description thereof will be omitted.

[0071] As shown in FIG. 4, the metal connecting short pipe 220 is connected to the siphon-type rainwater drainage member 100 by screwing the upper end screw (first screw portion) 120A into the lower mounting screw (first mounting screw) 100B of the siphon-type rainwater drainage member 100.

[0072] Moreover, the configuration and operation of the upper end screw (first screw portion) 220A are similar to those of the upper end screw 120A in the first embodiment, and therefore the description thereof will be omitted.

[0073] 4, the resin pipe 240 includes, for example, a resin pipe main body 241 and a threaded electric fusion joint 242, and the upper end of the resin pipe main body 241 is inserted into the joint of the threaded electric fusion joint 242 and joined by electric fusion, so that the resin pipe main body 241 and the threaded electric fusion joint 242 are integrally formed. For example, the resin pipe main body 241 and the threaded electric fusion joint 242 can be manufactured separately in a factory and transported separately to a construction site, and then assembled at the construction site. During assembly, the threaded electric fusion joint 242 can be screwed into the metal connection short pipe 220 first, and then the threaded electric fusion joint 242 can be electrically fused to the resin pipe main body 241. The resin pipe body 241 is similar to the resin pipe body 241 in the first embodiment, and therefore a description thereof will be omitted.

[0074] The threaded electrofusion joint 242 may be any of a variety of well-known threaded electrofusion joints. In this embodiment, the threaded electric fusion joint 242 has, for example, a cylindrical joint having an electric heating wire for fusion arranged on the inner surface side and an electrical terminal 242P arranged on the outer surface, and a metal member 243 is arranged on one end side (upper side) of this joint. Moreover, on one end side (upper side) of the metal member 243, an upper attachment screw (second attachment screw) 240A made of metal and consisting of a female screw is formed.

[0075] The upper attachment screw (second attachment screw) 240A is screwed into a lower end screw (second threaded portion) 220B formed on the metal short connection pipe 220, and the metal short connection pipe 220 and the resin pipe 240 are connected together. The rest is the same as in the first embodiment, so the explanation will be omitted.

[0076] <Third embodiment> Next, a third embodiment of the present invention will be described with reference to FIG. Fig. 5 is an exploded partial vertical cross-sectional view for explaining the schematic configuration of a piping structure according to a third embodiment of the present invention. In Fig. 5, reference numeral 30 denotes a rainwater drainage pipe (piping structure), reference numeral 320 denotes a resin-made short connection pipe (short connection pipe), reference numeral 320A denotes an upper end screw (first screw portion), reference numeral 320B denotes a lower end portion of the resin pipe (resin pipe connection portion), and reference numeral 340 denotes a resin pipe.

[0077] As shown in FIG. 5, the rainwater drainage piping (piping structure) 30 includes, for example, a siphon-type rainwater drainage member (drainage member) 100, a resin-made short connection pipe (short connection pipe) 320, and a resin pipe 340. The siphon type rainwater drainage member (drainage member) 100 is similar to that of the first embodiment, and therefore a description thereof will be omitted.

[0078] As shown in FIG. 5, the resin connecting short tube (connecting short tube) 320 comprises, for example, a resin connecting short tube main body (connecting short tube main body) 321, a connecting member 322 arranged at the upper end of the resin connecting short tube main body (connecting short tube main body) 321, and a fixing ring 324, and has an upper end screw (first screw portion) 320A consisting of a male screw formed at the upper end. In addition, in the resin connection short pipe 320, for example, the lower end portion (for example, the outer peripheral surface) of the resin connection short pipe main body 321 serves as a resin pipe connection portion for connection to the resin pipe 340.

[0079] The resin connection short pipe body 321 is made of, for example, a resin material, and has a flow hole 320H formed inwardly along the pipe axis. The resin material constituting the resin connection short pipe body (connection short pipe body) 321 can be set arbitrarily, but in this embodiment, the resin short pipe body 321 is formed from, for example, an olefin-based resin.

[0080] The connecting member 322 is, for example, a multi-stage cylindrical member formed from a metal such as brass with small diameter portions formed on the upper and lower sides, and an upper end screw (first screw portion) 320A consisting of a male screw is formed on the outer periphery of the upper small diameter portion.

[0081] The small diameter portion at the bottom of the connection member 322 is, for example, a sleeve, into which the sleeve is inserted from above into the flow hole 32 of the resin short pipe body 321. A fixing ring 324 is attached to the outer periphery of the portion of the resin connection short pipe body (connection short pipe body) 321 into which the sleeve is inserted. As a result, by gripping the resin connection short pipe body 321 from the inner and outer circumferential sides with the sleeve and fixing ring 324 of the connection member 322, the resin connection short pipe body 321 and the upper end screw (first screw portion) 420A are formed integrally.

[0082] The upper end screw (first screw portion) 320A of the resin connecting short pipe 320 is screwed into the first mounting screw 100B of the siphon-type rainwater drainage member (drainage member) 100, thereby connecting the siphon-type rainwater drainage member (drainage member) 100 and the resin connecting short pipe (connecting short pipe) 320.

[0083] In this embodiment, the resin pipe 340 includes, for example, a resin pipe main body 341 and an electric fusion joint 342, and the upper end of the resin pipe main body 341 is inserted into and joined to the electric fusion joint 342, thereby forming the resin pipe main body 341 and the electric fusion joint 342 integrally. Various well-known electric fusion joints can be used as the electric fusion joint 342. The material of the resin pipe main body 341 is the same as that of the first embodiment, and therefore description thereof will be omitted.

[0084] Then, resin pipe lower end 320B of resin connection short pipe 320 is inserted into and joined to electric fusion joint 342 of resin pipe 340, whereby resin connection short pipe 320 is connected to resin pipe 340. When joining, rather than first electrically fusing only resin pipe main body 341 to electric fusion joint 342, construction is performed with both connection part 320B and resin pipe main body 341 inserted into electric fusion joint 342, so that connection part 320B can be connected to resin pipe main body 341.

[0085] <Fourth embodiment> Next, a fourth embodiment of the present invention will be described with reference to FIG. Fig. 6 is an exploded partial vertical cross-sectional view for explaining the schematic configuration of a piping structure according to a fourth embodiment of the present invention. In Fig. 6, reference numeral 40 denotes a rainwater drainage pipe (piping structure), reference numeral 420 denotes a resin connection short pipe (connection short pipe), reference numeral 420A denotes an upper end screw (first screw portion), reference numeral 420B denotes a first coupling member (resin pipe connection portion), reference numeral 440 denotes a resin pipe, reference numeral 441 denotes a resin pipe main body, and reference numeral 440A denotes a second coupling member.

[0086] As shown in FIG. 6, the rainwater distribution drainage piping (piping structure) 40 includes, for example, a siphon-type rainwater drainage member (drainage member) 100, a connection short pipe 420, and a resin pipe 440. The siphon-type rainwater drainage member 100 is similar to that of the first embodiment, so it is given the same reference numerals as in the first embodiment and the description thereof will be omitted.

[0087] As shown in FIG. 6, the resin connecting short pipe (connecting short pipe) 420 includes, for example, a resin connecting short pipe main body (connecting short pipe main body) 421, a connecting member 422 arranged on the upper end of the resin connecting short pipe main body (connecting short pipe main body) 421, a fixing ring 424, and a first coupling member (resin piping connection part) 420B.

[0088] Further, at the upper end of the resin-made short connection pipe (short connection pipe) 420, an upper end screw (first screw portion) 420A made of a male screw is formed. Additionally, the lower end of the resin connecting short pipe 420 protrudes downward from the lower surface of the slab floor 10S.

[0089] The resin connection short pipe body 421 is made of, for example, a resin material, and has a flow hole 420H formed inwardly along the pipe axis. The resin material constituting the resin connection short pipe body (connection short pipe body) 421 is the same as that in the third embodiment, and therefore a description thereof will be omitted. Furthermore, the resin connection short pipe body 421 may be configured to have, for example, a butt joint portion.

[0090] The connecting member 422 is, for example, a multi-stage cylindrical member formed from a metal such as brass with small diameter portions formed on the upper and lower sides, and an upper end screw (first screw portion) 420A consisting of a male screw is formed on the outer periphery of the upper small diameter portion.

[0091] The resin connection short pipe body 421 is gripped by the sleeve and fixing ring 424 of the connection member 422, and the resin connection short pipe body 421 and the upper end screw (first screw portion) 420A are integrally formed. The configurations and functions of the connection member 422 and the fixing ring 424 are similar to those of the connection member 322 and the fixing ring 324 in the third embodiment, and therefore will not be described.

[0092] The first coupling member (resin pipe connecting portion) 420B includes a connection socket member 425 and a fixing ring 426, as shown in FIG. The connection socket member 425 includes an upper sleeve 425A located on the upper side and a lower sleeve 425B located on the lower side.

[0093] The upper sleeve 425A of the connection socket member 425 is inserted into the lower end of the resin connection short tube body 421, and a fixing ring 426 is attached to the outer periphery of the portion of the resin connection short tube body 421 into which the upper sleeve 425A is inserted, thereby gripping the resin connection short tube body 421 from the inner and outer periphery, and the resin connection short tube body 421 and the first coupling member 420B are formed integrally.

[0094] The resin pipe 440 includes, for example, a resin pipe main body 441 and a second coupling member 440A disposed on an upper end portion of the resin pipe main body 441. The resin connection short pipe body 441 is made of, for example, a resin material, and has a flow hole 440H formed inwardly along the pipe axis. The resin material constituting the resin pipe body 441 is the same as that in the first embodiment, and therefore the description thereof will be omitted.

[0095] As shown in FIG. 6, the second coupling member 440A includes, for example, a connection socket member 442, a fixing ring 443, a ring seal member 444, and a fastening housing member (connection holding mechanism) 445. The second coupling member 440A is disposed at the upper end of the resin pipe main body 441.

[0096] The connection socket member 442 includes a lower sleeve 442A located on the lower side and an upper sleeve 445B located on the upper side.

[0097] The lower sleeve 442A of the connection socket member 442 is inserted into the upper end of the resin piping main body 441, and a fixing ring 443 is attached to the outer periphery of the portion of the resin piping main body 441 into which the lower sleeve 442A is inserted, thereby gripping the resin piping main body 441 from the inner and outer periphery, and the resin piping main body 441 and the second coupling member 440A are formed integrally.

[0098] The ring seal member 444 is formed, for example, in a ring shape when viewed along the tube axis direction, and is formed in a substantially C-shape with the tube axis side open in a cross section including the tube axis. Further, in ring seal member 444, an upper lip portion is formed on the upper side thereof, and a lower lip portion is formed on the upper side thereof, sandwiching this opening portion. A lower sleeve 425B of connection socket member 425 is fitted and inserted into the upper lip portion, and an upper sleeve 442A of connection socket member 442 is fitted and inserted into the lower lip portion.

[0099] The fastening housing member 445 includes, for example, a pair of half-ring-shaped members 445A and a fastening member 445B, and is configured to combine the pair of half-ring-shaped members 445A with the fastening member 445B. This constitutes a connection retention mechanism that maintains the connection between the first coupling member 420B and the second coupling member 440A. The connection and retention mechanism is not limited to the fastening housing member 445, but may be arbitrarily set.

[0100] The half-split ring-shaped member 445A is formed in an approximately ring shape when assembled when viewed along the tube axis direction, and is divided into two parts along a plane including the tube axis, so that a fastening member 445B can be attached to the corresponding portions of each part. The fastening member 445B can be a known fastening member, and in this embodiment, for example, a bolt and a nut are used.

[0101] Then, half-ring-shaped member 445A is placed on the outer periphery of ring seal member 444, and their divided surfaces are butted together and fastened with fastening member 445B, thereby tightly adhering the upper lip portion of ring seal member 444 to lower sleeve 425B and the lower lip portion to upper sleeve 442A, thereby creating a liquid-tight seal between the inside and outside of the pipe.

[0102] According to the rainwater drainage piping (piping structure) 40 of the fourth embodiment, the resin piping connection part is made of the first coupling member 420A and is constituted by the second coupling member 440A, so that the resin piping 440 and the resin connecting short pipe 420 can be easily and efficiently connected without using special tools.

[0103] <Fifth embodiment> Next, a fifth embodiment of the present invention will be described with reference to FIG. Fig. 7 is an exploded partial vertical cross-sectional view for explaining the schematic configuration of a piping structure according to a fifth embodiment of the present invention. In Fig. 7, reference numeral 50 denotes a rainwater drainage pipe (piping structure), reference numeral 520 denotes a short connection pipe, reference numeral 520A denotes an upper end screw (first screw portion), reference numeral 520B denotes a first coupling member (resin pipe connection portion), reference numeral 540 denotes a resin pipe, and reference numeral 540A denotes a second coupling member.

[0104] As shown in FIG. 7, the rainwater distribution drainage piping (piping structure) 50 includes, for example, a siphon-type rainwater drainage member (drainage member) 100, a connecting short pipe 520, and a resin pipe 540. The siphon type rainwater drainage member (drainage member) 100 is similar to that of the first embodiment, so it is given the same reference numerals as in the first embodiment and the description thereof will be omitted.

[0105] As shown in FIG. 7, the resin connecting short pipe (connecting short pipe) 520 includes, for example, a resin connecting short pipe main body (connecting short pipe main body) 521, a connecting member 522 arranged on the upper end of the resin connecting short pipe main body (connecting short pipe main body) 521, a fixing ring 524, and a first coupling member (resin piping connection part) 520B.

[0106] Further, at the upper end of the resin-made short connection pipe (short connection pipe) 520, an upper end screw (first screw portion) 520A consisting of a male screw is formed. Additionally, the lower end of the resin connecting short pipe 520 protrudes downward from the lower surface of the slab floor 10S.

[0107] The resin connection short pipe body 521 is made of, for example, a resin material, and has a flow hole 520H formed inwardly along the pipe axis. The resin material constituting the resin connection short pipe body (connection short pipe body) 521 is the same as that in the third embodiment, and therefore a description thereof will be omitted.

[0108] The connecting member 522 is, for example, a multi-stage cylindrical member formed from a metal such as brass with small diameter portions formed on the upper and lower sides, and an upper end screw (first screw portion) 520A consisting of a male screw is formed on the outer periphery of the upper small diameter portion.

[0109] The resin connection short pipe body 521 is gripped by the sleeve and fixing ring 524 of the connection member 522, and the resin connection short pipe body 521 and the upper end screw (first screw portion) 520A are integrally formed. The configurations and functions of the connection member 522 and the fixing ring 524 are similar to those of the connection member 322 and the fixing ring 324 in the third embodiment, and therefore will not be described.

[0110] As shown in FIG. 7, the first coupling member (resin pipe connection portion) 520B includes a first coupling member main body 525, a lock member (connection holding mechanism) 526, a reinforcing ring 527, and a seal member 528, for example. The first coupling member body 525 includes an upper recess formed in an upper portion, a lower recess formed in a lower portion, and a flow passage connecting the upper recess and the lower recess.

[0111] The locking member (connection and retention mechanism) 526 is configured, for example, as viewed along the tube axis, to have a plurality of protrusions that are circumferentially spaced apart on an arc-shaped member and formed toward the inside (toward the tube axis).

[0112] The locking member 526 is made of an elastic material such as resin, and urges the protrusion inward by elastic force when viewed along the tube axis direction. The locking member 526 is mounted in a cylindrical wall portion constituting the lower recess so as to be elastically deformable in a through hole formed between the lower recess and the outer periphery, which corresponds to the arc-shaped member when viewed along the tube axis direction.

[0113] As shown in FIG. 7, the reinforcing ring 527 is disposed on the outer circumferential side of the locking member 526 and is configured to reinforce the arc-shaped member of the locking member 526 from returning to its original shape on the inner circumferential side when the arc-shaped member is expanded in diameter.

[0114] The first coupling member (plastic piping connection part) 520B has a resin connection short pipe body 521 inserted and fitted into an upper recess, so that the first coupling member 520B and the resin connection short pipe body 521 are formed integrally with each other by inserting the resin connection short pipe body 521 into the upper recess.

[0115] The seal member 528 includes, for example, a first seal member 528A that seals the end face and a second seal member that seals the peripheral face, which are respectively disposed on the bottom face and the inner peripheral face of the lower recess.

[0116] The resin pipe 540 includes, for example, a resin pipe main body 541 and a second coupling member 540A disposed on an upper end portion of the resin pipe main body 541. The resin connection short pipe body 541 is made of, for example, a resin material, and has a flow hole 540H formed inwardly along the pipe axis. The resin material constituting the resin pipe body 541 is the same as that in the first embodiment, and therefore the description thereof will be omitted.

[0117] As shown in FIG. 7, the second coupling member 540A is configured, for example, to have a second coupling body 542 formed in a substantially cylindrical shape with a small diameter portion at the upper side, and a lock recess (connection retention mechanism) 542U formed in the longitudinal center of the second coupling body 542, which is recessed toward the inner periphery.

[0118] In addition, the second coupling member 540A has a stepped recess formed in the lower part, and the resin piping main body 541 is inserted into the upper recess of this stepped recess, so that the second coupling member 540A and the resin piping main body 541 are formed integrally.

[0119] Then, by inserting the small diameter portion formed on the upper side of the second coupling body 542 into the lower recess of the first coupling 520B, the first coupling 520B and the second coupling body 540A are connected, and the resin connecting short pipe 520 and the resin piping 540 are connected. The lock recess 542, together with the lock member 526, constitutes a connection retention mechanism that retains the connection between the first coupling member (resin pipe connection portion) 540B and the second coupling member 540A.

[0120] When the small diameter portion of the second coupling body 542 is inserted into the lower recess of the first coupling 520B, the locking member (connection and retention mechanism) 526 formed in an approximately arc shape is expanded in diameter and then restored to its original shape and reduced in diameter, so that the convex portion of the locking member 526 is fitted lightly within the locking recess (connection and retention mechanism) 542U of the second coupling body 542, and the first coupling 520B and the second coupling 540A are connected. As a result, the resin connecting short pipe (connecting short pipe) 520 and the resin transition pipe 540 are connected.

[0121] Furthermore, when the small diameter portion of the second coupling body 542 is inserted up to the bottom of the lower recess of the first coupling 520B, the small diameter portion comes into close contact with the first seal member 528A and the second seal member, liquid-tightly sealing the flow holes of the first coupling member 520B and the second coupling member 540A from the outside.

[0122] In addition, it may be arbitrarily set whether the first coupling member (plastic piping connection part) 540B is the receiving port (recess) side into which the second coupling member 540A is inserted, or whether the first coupling member (plastic piping connection part) 540B is the insertion side and the second coupling member 540A is the receiving port (recess) side.

[0123] Further, the connection holding mechanism for holding the connection between the first coupling member (resin pipe connection portion) 540B and the second coupling member 540A is not limited to the lock member 526 and the lock recess 542U, but may be set arbitrarily.

[0124] According to the rainwater drainage piping (piping structure) 50 of the fifth embodiment, the resin piping connection portion is made of the first coupling member 520A and is constituted by the second coupling member 540A, so that the resin piping 540 and the resin connecting short pipe 520 can be easily and efficiently connected with a single touch.

[0125] Sixth embodiment A piping structure according to a sixth embodiment of the present invention will be described below with reference to Fig. 8 to Fig. 11. Fig. 8 is a perspective view illustrating the schematic configuration of the piping structure according to the sixth embodiment of the present invention, Fig. 9 is a partial end view seen from the side illustrating the schematic configuration of the siphon-type drainage member according to the sixth embodiment, Fig. 10 is an exploded cross-sectional view seen from the side illustrating the schematic configuration of the siphon-type drainage member, and Fig. 11 is an exploded perspective view illustrating the schematic configuration of the siphon-type drainage member.

[0126] In Figures 8 to 11, symbol 60 indicates a rainwater drainage pipe (piping structure), symbol 600 indicates a siphon-type rainwater drainage member (drainage member), symbol 602 indicates a cylindrical portion, symbol 605 indicates a connection portion, symbol 610 indicates a base plate portion, symbol 620 indicates a clamp ring portion, symbol 630 indicates a baffle portion, symbol 20S indicates a roof slab (floor structure), and symbol 20H indicates a through hole formed in the roof slab 20S.

[0127] The sixth embodiment is a modification of the first to fifth embodiments in which a siphon-type rainwater drainage member 600 is applied instead of the siphon-type rainwater drainage member 100 in the first to fifth embodiments, and in the following description, the rainwater drainage piping (piping structure) 10 according to the first embodiment is used as an example, but the sixth embodiment is not limited to the modification of the first embodiment. In other words, the sixth embodiment is not limited to the first embodiment, and the siphon-type rainwater drainage member 600 may be applied instead of the siphon-type rainwater drainage member 100 in the second to fifth embodiments.

[0128] As in the first embodiment, the rainwater drainage piping (piping structure) 60 is arranged, for example, between a roof slab 20S formed on the roof of a large facility such as a factory or shopping center, and a floor slab (floor structure, not shown) formed below the roof slab 20S.

[0129] The space between the roof slab 20S and the floor slab (floor structure, not shown) is, for example, a maintenance space. Note that the floor slab (floor structure, not shown) according to the sixth embodiment is similar to the floor slab 15S shown in the first embodiment, and therefore a description thereof will be omitted. Moreover, what is formed below the roof slab (floor slab) 20S is not limited to a floor slab (floor structure, not shown), but may be, for example, a deck plate, a ceiling panel, or the like.

[0130] As shown in FIG. 8, the rainwater drainage piping (piping structure) 60 includes, for example, a siphon-type rainwater drainage member (drainage member) 600 provided on the upper surface of a roof slab (floor structure) 20S, a metal connecting short pipe (connecting short pipe) 120, and a plastic pipe 140 positioned below the underside of the roof slab 20S and circulating the drainage water downstream. The rainwater drainage pipe 60 is configured to allow rainwater flowing in from the siphon-type rainwater drainage member 600 to flow through the metal connection short pipe 120 to the resin pipe 140 .

[0131] The roof slab (floor structure) 20S is, for example, a floor slab formed on the roof of a building, as shown in Fig. 8. The configuration of the roof slab (floor structure) 20S can be set arbitrarily, but it is preferable that it comprises, for example, a roof slab main body 11S, a waterproof layer 12S formed on the upper surface of the roof slab main body 11S, and a surface finishing layer 23S formed on the upper surface of the waterproof layer 12S, as shown in Fig. 8.

[0132] As shown in Figs. 9 and 10, the roof slab 20S has a through hole 20H formed therein, which penetrates in the vertical direction from the upper surface to the lower surface, using a void pipe. In addition, a recess 20V is formed on the upper surface of the roof slab 20S, which is complementary to the underside of the siphon-type rainwater drainage member 600, and the recess 20V is configured to accommodate the underside of the siphon-type rainwater drainage member 600 up to its outer periphery. Further, an anchor bolt 20T for attaching a siphon-type rainwater drainage member 600 to a roof slab (floor structure) 20S is embedded in the recess 20V. Further, the lower part of the siphon-type rainwater drainage member 600 and the upper part of the metallic connecting short pipe 120 are connected within the through hole 20H.

[0133] The sixth embodiment differs from the first embodiment in that it has a siphon-type rainwater drainage member (drainage member) 600 instead of a siphon-type rainwater drainage member (drainage member) 100, but is otherwise similar to the first embodiment, so the same symbols as in the first embodiment are used and the description is omitted.

[0134] As shown in Figures 8 to 11, for example, when viewed in a plane, the siphon-type rainwater drainage member (drainage member) 600 comprises a base plate portion 610 having a circular outer shape with a circular hole 610H formed in the center, a cylindrical tubular portion 602, a connection portion 605 connected to the tubular portion 602, a clamp ring portion 620 arranged on the base plate portion 610, and a baffle portion 630 arranged on the clamp ring portion 620.

[0135] The base plate portion 610 comprises a base plate main body 611 having a circular outer shape when viewed in a plane and a circular hole 610H formed in the center, and a tubular portion 602 connected to the lower part of the circular hole 610H. The material for forming the base plate portion 610 can be set arbitrarily, and may be, for example, a metal material such as an aluminum alloy or stainless steel, or a resin material. In this embodiment, for example, the base plate portion 610 is formed by joining a part formed by processing stainless steel to a base plate main body 611 formed by punching and plastic processing a stainless steel plate.

[0136] The base plate main body 611, for example, includes a ring-shaped wall portion 611P made of a flat plate having a circular outer shape when viewed in a plane, which is positioned inside the base plate portion 610 and has a circular hole 610H penetrating through the thickness direction in the center, and an inclined wall portion 611S connected to the outer periphery of the ring-shaped wall portion 611P, having a circular outer shape, and sloping slightly downward from the outer periphery to the inner periphery to form a gently sloping surface in an approximately bowl shape.

[0137] An asphalt waterproof sheet (not shown) is attached to the upper surface of the base plate portion 610, extending outward from the base plate portion 610, and the asphalt waterproof sheet (not shown) is configured to be pressed from above by the clamp ring portion 620. Note that it is possible to determine whether or not a waterproof sheet is used, and a waterproof sheet or waterproofing means may be used instead of the asphalt waterproof sheet.

[0138] In addition, on the upper surface of the base plate main body 611, baffle support bosses 612 are provided at four (multiple) locations spaced apart circumferentially, extending upward and supporting the baffle portion 630 via through holes 623 formed in the clamp ring portion 620. In addition, a female threaded hole (not shown) is formed in the baffle support boss 612 along the longitudinal direction from the tip portion (upper end surface), and a baffle mounting bolt (not shown) is screwed into this female threaded hole (not shown) to fix the baffle portion 630. Alternatively, a male screw may be formed at the tip of baffle support boss 612 and baffle portion 630 may be fixed with a nut.

[0139] In addition, on the underside of the base plate main body 611, anchor bolt mounting bosses (anchor bolt mounting portions) 613 for mounting anchor bolts 20T for fixing the base plate 610 to the roof slab 20S are formed at four (multiple) locations spaced circumferentially. In this embodiment, the anchor bolt 20T is attached to the female thread formed in the anchor bolt mounting boss 613. However, for example, instead of the anchor bolt mounting boss 613, a circular hole may be formed to expose the male thread portion of the anchor bolt 20T from the upper surface of the base plate body 611 so that a nut (not shown) can be screwed into the male thread portion of the anchor bolt 20T.

[0140] Furthermore, the base plate body 611 has two (plural) female screw holes (not shown) formed at intervals in the circumferential direction. A male screw is screwed into this female threaded hole (not shown) through a through hole (not shown) formed in the clamp ring portion 620 corresponding to the female threaded hole, so as to fix the clamp ring portion 620 to the base plate 610.

[0141] The tube portion 602 is formed in a cylindrical shape and is connected to the periphery of the circular hole 610H of the base plate main body 611. Inside the tube portion 602, a communication hole 600H is formed. In this embodiment, the tube portion 602 is formed integrally with the base plate body 611 by, for example, plastic processing so that a wall portion near the center of the base plate body 611 protrudes downward. Note that the tube portion 602 may be joined to the periphery of the circular hole 610H by welding or the like.

[0142] The connecting portion 605 is cylindrical and formed by casting a metal material such as aluminum alloy, cast iron, stainless steel, etc. The connecting portion 605 is joined (for example, welded) to the lower part of the cylindrical portion 602 so as to be substantially integral with the cylindrical portion 602 by fitting the cylindrical portion 602 into the upper inside of the connecting portion 605 or by abutting an end face of the connecting portion 605 against an end face of the cylindrical portion 602. Further, inside the tube portion 602 and the connection portion 605, a communication hole 600H is formed in the vertical direction.

[0143] As shown in Figures 9 and 10, the connection portion 605 has a lower mounting screw (first mounting screw) 600B consisting of a female thread formed on its inner surface, and this lower mounting screw 600B is capable of being screwed into, for example, the threaded portion 120A of the metal connection short tube 120.

[0144] As shown in Figures 8 to 11, when viewed in a plane, clamp ring portion 620 has a circular outer shape and is formed with a smaller diameter than base plate 610, and comprises a bottom wall portion 621 whose lower surface is formed complementarily to the upper surface of base plate 610 and has a circular hole 620H opening in the center, a rising wall portion 622 standing upward from the outer circumferential edge of bottom wall portion 621, and rectangular recesses 622U arranged at intervals in the circumferential direction on rising wall portion 622 and penetrating in the thickness direction from the inside to the outside.

[0145] The material from which clamp ring portion 620 is formed can be set arbitrarily, and may be, for example, a metal material such as an aluminum alloy or stainless steel, or a resin material. In this embodiment, for example, it is formed by punching and plastically working a stainless steel plate.

[0146] As shown in Figures 9 and 10, when viewed in a plane, the bottom wall portion 621 comprises: a flat ring-shaped planar wall portion 621P that is arranged inward and corresponds to the ring-shaped wall portion 611P of the base plate main body 611; and an inclined wall portion 621S that is connected to the outer periphery of the ring-shaped planar wall portion 621P and has a circular outer shape with a smaller diameter than the base plate main body 611, and that slopes slightly downward from the outer periphery to the inner periphery to form a gently sloping surface that is approximately bowl-shaped.

[0147] In addition, a circular through hole 624 is formed in the bottom wall portion 621 at a position corresponding to the baffle support boss 612 erected on the base plate portion 610, the circular through hole 624 penetrating in the vertical direction and allowing the baffle support boss 612 to pass upward.

[0148] As shown in Figures 8 to 11, the baffle section 630 includes a baffle plate 631, a lower rib 632 arranged on the underside of the outer periphery of the baffle plate 631, and a vertical rib 633 arranged on the upper surface of the baffle plate 631 and extending downward on the outer periphery side. The material for forming the baffle portion 630 can be set arbitrarily, and may be, for example, a metal material such as an aluminum alloy or stainless steel, or a resin material. In this embodiment, for example, the baffle portion 630 is formed by casting an aluminum alloy to form an integral body, and then machining the cast aluminum alloy.

[0149] The baffle plate 631 has a circular outer shape when viewed in a plan view, and a flat portion 631P is formed on the inner periphery of the upper surface, and a curved portion that slopes gently downward as it approaches the outer periphery, in other words, a dome-shaped portion 631D (which bulges outward on the inner periphery) is formed on the outer periphery of the flat portion 631P. Further, on the lower surface of the baffle plate 631, a dome-shaped recess 631U is formed which is a curved surface portion that gradually bulges upward (depresses upward) from the outer periphery toward the inner periphery. In addition, near the outer periphery of the baffle plate 631, a through hole 631H is formed that runs around the center and penetrates the thickness direction of the baffle plate 631 when viewed in a plane, and the hole 631H is divided into eight (multiple) holes extending in the circumferential direction by lower ribs 632.

[0150] The lower ribs 632 are disposed on the lower surface of the baffle plate 631 and formed in a flat plate shape extending downward, and for example, eight (plural) lower ribs are formed at intervals in the circumferential direction of the baffle plate 631. Moreover, the lower rib 632 is formed so as to become more spaced away from the lower surface of the dome-shaped recess 631U toward the outer periphery when viewed from the side.

[0151] The vertical rib 633 is, for example, in the form of a flat plate extending upward on the upper surface of the baffle plate 631 . In addition, when viewed in a plane, the vertical rib 633 includes a V-shaped wall portion 633V which extends from midway in the radial direction of the baffle plate 631 toward the inner periphery and is formed in an approximately V shape which intersects with the outer periphery side of the center of the baffle plate 631, and a radial wall portion 633W which is connected to the outer periphery end portion of the V-shaped wall portion 633V and extends radially from the center of the baffle plate 631 toward the outer periphery side, with the outer periphery side extending lower than the baffle plate 631 (for example, at the same position as the lower end of the lower rib 632). Moreover, the upper portion of the V-shaped wall portion 633V is, for example, an inclined portion whose tip side (the center side of the baffle plate 631) is lower.

[0152] In this embodiment, for example, eight (plural) vertical ribs 633 are arranged at intervals in the circumferential direction of the baffle plate 631 when viewed from above. Further, the vertical rib 633 has communication holes 633H formed therein, which penetrate the radial wall portions 633W along the circumferential direction of the baffle portion 630, at positions corresponding to the through holes 631H in the radial direction of the baffle plate 631.

[0153] With this configuration, the siphon-type rainwater drainage member (drainage member) 600 suppresses the formation of a column of air near the center of the flowing-in rainwater (drainage), allowing the rainwater to flow efficiently by the siphon effect. The configuration of the siphon type rainwater drainage member (drainage member) 600 may be changed arbitrarily.

[0154] The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the invention.

[0155] For example, in the above embodiment, a case was described in which the metal connection short tube 120 has an upper end thread (first thread portion) 120A which is a male thread and a lower end thread (second thread portion) 120B which is a female thread, and the metal connection short tube 220 has both upper end threads 220A and lower end threads 220B which are male threads. However, it is possible to arbitrarily set whether the first thread portion and the second thread portion are male threads or female threads, and the first thread portion may be a female thread.

[0156] In addition, in the above embodiment, the drainage member is described as a siphon-type rainwater drainage member 100, 600, but other drainage members may be used that are installed on the upper surface of the floor slab and drain wastewater and other wastewater formed on the floor slab through a through hole to the underside of the floor slab.

[0157] In addition, in the above embodiment, the case has been described in which the floor structure is the roof slab 10S, 20S that constitutes the floor surface of the roof, but the present invention is not limited to the roof slab 10S, 20S and may be applied to various floor structures such as floor members and ceiling panels formed of slabs or deck plates (including those in which concrete is poured or not poured) and the like and formed to separate upper and lower floors on rooftops, roofs, balconies, or indoors.

[0158] In addition, in the above embodiment, the case where the resin pipe 140 has a T-shaped pipe 141 as the resin pipe main body has been described, but the configuration of the resin pipe can be set arbitrarily, and for example, it may be configured with a resin pipe having a bent part such as an elbow, or a straight pipe (such as a vertical main pipe) for draining water in a straight vertical direction.

[0159] Moreover, the material of the short pipe can be arbitrarily set, for example, to be a metallic connecting short pipe or a resin short pipe. In addition, the configuration described for the metal short pipe 140 may be applied to a resin short pipe formed from a hard resin material, such as a polyvinyl chloride short pipe, instead of a metal short pipe, and the first thread may be formed directly into the resin short pipe body.

[0160] In addition, the joining of the connection member body and the connection member arranged on the upper part of the resin pipe body, such as a threaded electric fusion joint or an electric fusion joint, can be set arbitrarily. For example, the connection member may be attached to the resin pipe body in advance in a factory or the like, or they may be manufactured separately in a factory and transported separately to the construction site, and then assembled at the construction site. In addition, when assembling, for example, the threaded electric fusion joint may be screwed onto the metal connection short pipe first, and then the threaded electric fusion joint may be electrically fused to the resin pipe body, or the electric fusion joint may be fused to the resin short pipe body first, and then the electric fusion joint may be electrically fused to the resin pipe body, or the resin short pipe body and the resin pipe body may be simultaneously inserted into the electric fusion joint and then electrically fused.

[0161] In addition, in the above embodiment, the case where the resin material constituting the T-shaped pipe (plastic pipe main body) 141 and the plastic pipe main bodies 241, 341, 441, and 541 is an olefin-based resin has been described. However, when an olefin-based resin is used, the resin material can be any resin, such as polypropylene, polybutene, low-density polyethylene, high-density polyethylene, linear low-density polyethylene, atactic polypropylene, isotactic polypropylene, syndiotactic polypropylene, poly-α-olefin, and the like. Moreover, instead of the olefin resin, hard polyvinyl chloride resin, ABS, AES, or the like may be used. Further, the resin pipe may be made of a plurality of different types of materials instead of a single resin material.

[0162] In addition, in the above fourth and fifth embodiments, a case has been described in which the first coupling member (plastic piping connection portion) 420B is butt-joined to the second coupling member 440A, and the first coupling member (plastic piping connection portion) 540B is formed with a receiving recess for inserting and joining the second coupling member 540A, but the configurations of the first coupling member (plastic piping connection portion) and the second coupling member can be set arbitrarily. In addition, for example, in the case where the first coupling member (plastic piping connection portion) 440A and the second coupling member 540A have different functions, it is possible to arbitrarily set which one will be the connecting short pipe side (plastic piping connection portion).

[0163] In addition, within the scope of the invention, it is possible to replace the components in the above-described embodiments with well-known components, and the above-described embodiments may be combined as appropriate. [Explanation of symbols]

[0164] 10, 20, 30, 40, 50, 60 Rainwater drainage piping (piping structure) 10S, 20S Roof slab (floor structure) 11S Roof slab body (floor structure) 12S Waterproof layer (floor structure) 13S Surface Finishing Layer (Floor Structure) 10H through hole 100, 600 Siphon-type rainwater drainage components (drainage components) 100B Lower mounting screw (first mounting screw) 120, 220 Metallic short pipe (short pipe) 320, 420, 520 Plastic short connection pipe (short connection pipe) 120A, 220A, 320A, 420A, 520A Top screw (first screw part) 120B, 220B Bottom screw (second screw part) 140, 240, 340, 440, 540 Resin piping 141 T-pipe (T-joint, plastic piping body) 241, 341, 441, 541 Plastic piping body 140A, 240A, 340A Upper mounting screw (second mounting screw) 420B, 520B 1st coupling (plastic piping connection part) 440A, 540A 2nd coupling

Claims

1. A drainage member that is inserted into a through hole of the floor structure and allows drainage water from the floor structure to flow downward; A connection short pipe is disposed in the through hole and connected to the drainage member; a resin pipe connected to the connecting short pipe, The drainage member is disposed in the through hole and includes a tubular portion extending downward from the drainage member, a first screw portion is formed on an upper portion of the connecting short pipe, and the first screw portion is screwed into a first mounting screw formed on the cylindrical portion; A piping structure, wherein the connecting short pipe protrudes downward from the underside of the floor structure and has a resin pipe connecting portion formed therein for connecting to the resin pipe.

2. The drainage member comprises a base plate formed in a substantially circular shape and having a circular hole at the center; The piping structure according to claim 1 , further comprising: a vertical rib formed upward on the base plate.

3. The piping structure according to claim 1 or 2, wherein the resin pipe connection portion is an electric fusion joint.

4. 3. The piping structure according to claim 1, wherein the resin pipe connection portion is constituted by a first coupling member, and a second coupling member connectable to the first coupling member is disposed at an upper end of the resin pipe.

5. A piping structure described in any one of claims 1 to 4, wherein the lower end of the tubular portion is located above the underside of the floor structure.

6. A method for manufacturing a piping structure according to any one of claims 1 to 5, A method for manufacturing a piping structure, comprising connecting the drainage member, the connecting short pipe, and the resin pipe.

7. A method for manufacturing a piping structure as described in claim 6, comprising connecting the connecting short pipe and the plastic piping connection portion, and then connecting the connecting short pipe to the plastic piping.

8. A method for manufacturing a piping structure as described in claim 6, wherein the connecting short pipe and the resin piping are simultaneously connected to the resin piping connection portion.

9. A method for manufacturing a piping structure as described in claim 6, further comprising connecting the resin piping connection portion to the resin piping and then connecting the resin piping to the connecting short pipe.

10. A building in which a piping structure described in any one of claims 1 to 5 is installed.

11. A resin pipe for use in a piping structure comprising: a drainage member that is inserted into a through hole of a floor structure and allows drainage water from the floor structure to flow downward; a connecting short pipe that is disposed in the through hole and connected to the drainage member; and a resin pipe that is connected to the connecting short pipe, the drainage member is disposed in the through hole and includes a cylindrical portion extending downward from the drainage member, a first screw portion is formed above the connecting short pipe, and the first screw portion and a first mounting screw formed on the cylindrical portion are screwed together; The connecting short pipe protrudes downward from the lower surface of the floor structure, and a resin pipe connecting portion for connecting to the resin pipe is formed, The resin pipe includes a resin pipe main body and a connection member that is connected to the resin pipe connection portion.

12. The plastic piping as described in claim 11, wherein the plastic piping body is provided with a T-shape or an elbow.

13. The connecting short pipe comprises a first coupling member, The resin pipe according to claim 11 or 12, wherein the connection member is a second coupling member connectable to the first coupling member.

14. The plastic piping described in any one of claims 11 to 13, wherein the connecting member is pre-attached to the plastic piping body and formed as a single unit.

15. A method for manufacturing a resin pipe described in any one of claims 11 to 14.

Images