Piping construction

Abstract

To provide a piping structure for suppressing the outflow of water through between an upper cover and a lower cover to the outside.SOLUTION: A piping structure 1 includes a collective pipe joint 10 having a joint body 24 having vertical pipe connection parts 16, 21 connectable to vertical pipes P1, P5 and a horizontal pipe connection part 17 protruded to the outer peripheral face of the joint body and connectable to a horizontal pipe P3, an upper cover 30 covering an area above the joint body, a lower cover 35 covering an area below the area covered with the upper cover and arranged at a vertical space from the upper cover, and a cylindrical seal part 40 covering the upper cover and the lower cover.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a piping structure. [Background technology]

[0002] Conventionally, a piping structure in which an upper cover and a lower cover are wrapped around a collecting pipe joint is known (see, for example, Patent Document 1). In the collecting pipe joint, a horizontal pipe connecting portion is provided on the joint body. The horizontal pipe connecting portion penetrates the upper cover. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-116732 Summary of the Invention [Problem to be solved by the invention]

[0004] This type of piping structure is used in multi-story buildings (architectures) such as apartment buildings and hotels. In multi-story buildings, adjacent floors in the vertical direction are separated by floor slabs. Slab holes are formed in the floor slabs. Part of the piping structure is placed in the slab holes of the floor slab, and the slab holes are backfilled with a filler material such as mortar.

[0005] When it rains while a piping structure is being installed in a multi-story building, water may accumulate on the floor slab. If this water enters the area in the radial direction inside the upper cover through the portion of the upper cover where the horizontal pipe connection is passed, there is a risk that the water will flow out through the gap between the upper and lower covers. The water that flows out may pass between the periphery of the slab hole in the floor slab and the lower cover, and leak into the floor below the floor slab.

[0006] The present invention has been made in consideration of such problems, and has an object to provide a piping structure that prevents water from flowing out to the outside through the gap between the upper cover and the lower cover. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention proposes the following means. The piping structure of the present invention is characterized by comprising a fitting body having a vertical pipe connection portion connectable to a vertical pipe, a collecting pipe fitting having a horizontal pipe connection portion protruding from the outer surface of the fitting body and connectable to a horizontal pipe, an upper cover covering an upper portion of the fitting body, a lower cover covering a portion of the fitting body below the portion covered by the upper cover and arranged with a gap in the vertical direction from the upper cover, and a tubular sealing portion covering the upper cover and the lower cover. The cylindrical shape referred to here does not mean a shape formed by winding a strip-shaped member in the circumferential direction, but a shape formed seamlessly in the circumferential direction.

[0008] In this invention, a collecting pipe joint to which vertical pipes and horizontal pipes can be connected can be covered with an upper cover and a lower cover. At this time, the upper cover and the lower cover are covered with a cylindrical sealing portion. This makes it difficult for water to flow out through the gap between the upper cover and the sealing portion, and between the lower cover and the sealing portion. Therefore, it is possible to prevent water from flowing out through the gap between the upper cover and the lower cover.

[0009] In addition, in the piping structure, the sealing portion may have a cylindrical lower sealing member that covers the lower cover and a gap portion located between the upper cover and the lower cover in the fitting body, and a cylindrical upper sealing member that covers the upper cover and the lower sealing member. In this invention, the lower sealing member prevents water from flowing between the joint body and the lower cover, and the upper sealing member prevents water from flowing between the upper cover and the lower sealing member.

[0010] In the piping structure, the sealing portion may include a cylindrical reinforcing member that covers a portion of the upper sealing member that corresponds to the gap and urges the upper sealing member inward. In this invention, the portions of the upper and lower sealing members corresponding to the gaps are biased inward by the reinforcing members. This prevents water from flowing between the joint body and the lower sealing member, and between the lower and upper sealing members. At this time, the reinforcing members can prevent the upper and lower covers from being compressed inward.

[0011] In the piping structure, the sealing portion may have a cylindrical sound-absorbing cover that covers the lower sealing member, the reinforcing member, and the upper sealing member. In this invention, the sound, vibrations, etc. generated by wastewater flowing through the collecting pipe joint and leaking to the outside through the lower sealing member, the upper sealing member, and the reinforcing member can be absorbed by the sound-absorbing cover.

[0012] In the piping structure, the sealing portion may have a cylindrical sound-absorbing cover that covers the lower sealing member and the upper sealing member. In this invention, the sound, vibration, etc. generated by the drainage water flowing through the collecting pipe joint and leaking to the outside through the lower sealing member and the upper sealing member can be absorbed by the sound absorbing cover.

[0013] In addition, in the piping structure, the sealing portion may include a sealing portion main body having a cylindrical gap sealing piece that covers the portion of the fitting body located between the upper cover and the lower cover, a cylindrical lower sealing piece that protrudes downward from the gap sealing piece and covers the lower cover, and a cylindrical upper sealing piece that protrudes upward from the gap sealing piece and covers the upper cover, and a cylindrical reinforcing member that covers the gap sealing piece and urges the gap sealing piece inward. In this invention, the reinforcing member biases the gap sealing pieces inward, so that the gap sealing pieces can reliably suppress the flow of water on the outer peripheral surface of the joint body. Furthermore, the lower sealing piece and the upper sealing piece can suppress the flow of water on the outer peripheral surfaces of the lower cover and the upper cover.

[0014] In the piping structure, the sealing portion may have a cylindrical sound-absorbing cover that covers the sealing portion main body and the reinforcing member. In this invention, the sound, vibration, etc. generated by wastewater flowing through the collecting pipe joint and leaking to the outside through the sealing portion main body and the reinforcing member can be absorbed by the sound-absorbing cover.

[0015] In addition, in the piping structure, the sealing portion may include a cylindrical sealing portion main body that covers the upper cover, a gap portion located between the upper cover and the lower cover in the fitting main body, and the lower cover, and a cylindrical reinforcing member that covers the portion of the sealing portion main body that corresponds to the gap portion and urges the sealing portion main body inward. In this invention, the sealing body can prevent water from flowing between the fitting body and the upper cover, and between the fitting body and the lower cover. Furthermore, the reinforcing member can reliably prevent water from flowing between the fitting body and the sealing body. At this time, the reinforcing member can prevent the upper cover and the lower cover from being compressed inward.

[0016] In the piping structure, the sealing portion may have a cylindrical sound-absorbing cover that covers the sealing portion main body and the reinforcing member. In this invention, the sound, vibration, etc. generated by wastewater flowing through the collecting pipe joint and leaking to the outside through the sealing portion main body and the reinforcing member can be absorbed by the sound-absorbing cover.

[0017] Furthermore, in the piping structure, the sealing portion may include a cylindrical lower sealing member that covers the lower cover and a gap portion located between the upper cover and the lower cover in the fitting body, and is arranged between the fitting body and the upper cover, a cylindrical upper sealing member that covers the upper cover and the lower sealing member, and a cylindrical reinforcing member that covers a portion of the upper sealing member that corresponds to the gap portion and urges the upper sealing member inward. In this invention, the lower sealing member prevents water from flowing between the fitting body and the lower cover over a wider area in the vertical direction, and the upper sealing member prevents water from flowing between the upper cover and the lower sealing member. The reinforcing member also prevents water from flowing between the fitting body and the lower sealing member. At this time, the reinforcing member prevents the upper and lower covers from being compressed inward.

[0018] In the piping structure, the sealing portion may have a cylindrical sound-absorbing cover that covers the upper sealing member and the reinforcing member. In this invention, the sound, vibrations, etc. generated by wastewater flowing through the collecting pipe joint and leaking to the outside through the lower sealing member, the upper sealing member, and the reinforcing member can be absorbed by the sound-absorbing cover. [Effects of the Invention]

[0019] The piping structure of the present invention can prevent water from flowing out to the outside through the gap between the upper cover and the lower cover. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a partially cutaway front view of a piping structure according to a first embodiment of the present invention. [Figure 2] FIG. 5 is a partially cutaway front view of a main part of a piping structure according to a second embodiment of the present invention. [Figure 3] FIG. 10 is a partially cutaway front view of a main part of a piping structure according to a third embodiment of the present invention. [Figure 4] FIG. 10 is a partially cutaway front view of a main part of a piping structure according to a fourth embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0021] (First embodiment) A first embodiment of a piping structure according to the present invention will be described below with reference to FIG. As shown in Fig. 1, the piping structure 1 of this embodiment is used in a multi-story building (architecture) 101. In the multi-story building 101, a plurality of stories 102 are stacked in the vertical direction. A floor slab 103 separates the plurality of stories 102 (i.e., upper and lower floors). A slab hole 103a is formed in the floor slab 103, penetrating in the vertical direction. The piping structure 1 includes a collecting pipe joint 10, an upper cover 30, a lower cover 35, and a sealing portion 40.

[0022] Here, the collecting pipe joint 10, the upper cover 30, the lower cover 35, and the sealing portion 40 are each formed in a cylindrical shape. The central axes (axial lines) of the collecting pipe joint 10, the upper cover 30, the lower cover 35, and the sealing portion 40 are arranged coaxially with a common axis. Hereinafter, the common axis will be referred to as the axis O1, and the direction along the axis O1 will be referred to as the axis O1 direction. The collecting pipe joint 10, the upper cover 30, the lower cover 35, and the sealing portion 40 are arranged so that the axis O1 extends in the vertical direction. These may also be arranged so that the axis O1 is inclined with respect to the vertical direction.

[0023] In the direction of the axis O1, the side of the lower connecting pipe 12 relative to the upper connecting pipe 11 described later is referred to as the downward Z1, and the side of the upper connecting pipe 11 relative to the lower connecting pipe 12 is referred to as the upward Z2. When viewing the piping structure 1 from the top-bottom direction, the direction perpendicular to the axis O1 is referred to as the radial direction, and the direction going around the axis O1 is referred to as the circumferential direction. However, the downward Z1 and upward Z2 in the drawing are merely for convenience of showing the directions, and are actually directions relative to a reference point.

[0024] The shape of the collecting pipe joint 10 is not particularly limited as long as it has vertical pipe connecting portions 16, 21 and a horizontal pipe connecting portion 17, which will be described later. For example, the collecting pipe joint 10 has an upper connecting pipe 11 and a lower connecting pipe 12.

[0025] The upper connecting pipe 11 has an upper main body 15 , an upper vertical pipe connecting portion (vertical pipe connecting portion) 16 , and a horizontal pipe connecting portion 17 . The upper body 15 is cylindrical. However, the upper body 15 may be cylindrical, such as a square tube. A vertical rib 15a extending in the vertical direction is provided inside the upper body 15. The vertical rib 15a is arranged so as to avoid the opening on the base end side of the horizontal pipe connecting portion 17. A plurality of ribs (not shown) may be provided on the outer peripheral surface of the upper body 15. The plurality of ribs protrude radially outward from the upper body 15. For example, four sets of three ribs spaced apart in the axial direction O1 are arranged at intervals in the circumferential direction. The four sets of ribs are arranged at equal intervals in the circumferential direction. The radial size of each rib is not particularly limited. When the collecting pipe joint 10 is installed in the multi-story building 101, the collecting pipe joint 10 is held in place by support fittings (not shown) contacting the multiple ribs from the radially outer side.

[0026] In this example, the upper vertical pipe connection part 16 is a receiving port. The upper vertical pipe connection part 16 is provided at the upper end part of the upper main body 15. The upper vertical pipe connection part 16 is connectable to a first vertical pipe (vertical pipe) P1. The first vertical pipe P1 is a pipe made of a resin such as polyethylene or polyvinyl chloride. The lower end part of the first vertical pipe P1 is disposed within the upper vertical pipe connection part 16. It is preferable that a stopper that restricts the movement of the first vertical pipe P1 downward Z1 and a sealing member that watertightly seals the gap between the first vertical pipe P1 and the upper vertical pipe connection part 16 are provided within the upper vertical pipe connection part 16. The upper vertical pipe connection portion may be a spigot, a flange, or the like.

[0027] The horizontal pipe connecting portions 17 protrude radially outward from the outer peripheral surface of the upper body 15. In this example, the horizontal pipe connecting portions 17 are sockets. In this embodiment, the collecting pipe joint 10 has two horizontal pipe connecting portions 17. The directions in which the two horizontal pipe connecting portions 17 extend form an angle of 90° in plan view. The number of horizontal pipe connecting portions 17 that the collecting pipe joint 10 has may be one, or may be three or more. The horizontal pipe connecting portion may be a spigot, a flange, or the like.

[0028] The horizontal pipe connecting portion 17 has a connecting portion main body 17a and a socket unit 17b. The connecting portion main body 17a is cylindrical and protrudes radially outward from the outer circumferential surface of the upper body 15. Hereinafter, the portion of the upper body 15 (the coupling main body 24 described below) where the horizontal pipe connecting portion 17 is provided will be referred to as the connecting portion installation portion 15b. The receiving unit 17b can be attached to and detached from the connection body 17a. The receiving unit 17b can be connected to the horizontal pipe P3. The horizontal pipe P3 has a configuration similar to the first vertical pipe P1, except that the horizontal pipe P3 has a smaller outer diameter than the first vertical pipe P1. The horizontal pipe P3 has a water gradient and is arranged along a substantially horizontal plane. The end of the horizontal pipe P3 is arranged within the receiving unit 17b. It is preferable that a stopper and a sealing member are provided within the receiving unit 17b, as with the upper vertical pipe connection part 16. Note that socket unit 17b may be configured integrally with connection portion main body 17a.

[0029] The upper body 15, vertical rib 15a, upper vertical pipe connecting portion 16, and connecting portion body 17a that constitute the upper connecting pipe 11 are integrally formed by injection molding or the like using a resin composition. Examples of resins constituting the resin composition include polyolefin resins such as polyethylene resins and polypropylene resins, ABS resins, and polyvinyl chloride resins, with polyvinyl chloride resins being preferred. The term "polyolefin resin" refers to a resin consisting of polyolefin alone, or, in the case of a resin containing multiple types of resins, a resin in which the resin with the largest mass is polyolefin. Similarly, the term "polyvinyl chloride resin" refers to a resin consisting of polyvinyl chloride alone, or, in the case of a resin containing multiple types of resins, a resin in which the resin with the largest mass is polyvinyl chloride.

[0030] A fire-resistant material containing a thermal expansion material may be provided on the outer or inner surface located within the slab hole 103a of the upper connecting pipe 11. The thermal expansion material may be any material that expands due to heat generated during a fire, such as thermally expandable graphite. When providing the fire-resistant material on the outer surface of the upper connecting pipe 11, the fire-resistant material may be provided by wrapping a sheet of the fire-resistant material around the pipe. When providing the fire-resistant material on the inner surface of the upper connecting pipe 11, the fire-resistant material may be provided by placing a cylindrical tubular fire-resistant material inside the lower part of the upper connecting pipe 11. The cylindrical tubular fire-resistant material will be described in detail below.

[0031] The lower connecting pipe 12 has an inclined pipe section 20 and a lower vertical pipe connecting section (vertical pipe connecting section) 21. The upper main body 15, the upper vertical pipe connecting section 16, the inclined pipe section 20, and the lower vertical pipe connecting section 21 constitute a joint main body 24. The inclined pipe section 20 has a cylindrical shape whose outer diameter and inner diameter both become smaller as it goes downward Z1. Inside the inclined pipe section 20, a flow straightening plate 20a extending in the vertical direction is provided. For example, the inclined pipe portion 20 is manufactured by injection molding a resin composition. Examples of resins that can be used to form the inclined pipe section 20 include polyolefin resins and polyvinyl chloride resins, and among these, polyvinyl chloride resins are preferred. Polyvinyl chloride resins can more reliably close the pipe in the event of a fire.

[0032] A fire-resistant material 18 containing a thermal expansion material may be provided on the outer or inner surface located inside the slab hole 103a of the lower connecting pipe 12. The thermal expansion material may be any material that expands due to heat generated during a fire, such as thermally expandable graphite. When providing the fire-resistant material on the outer surface of the lower connecting pipe 12, the fire-resistant material may be provided by wrapping a sheet of the fire-resistant material around the outer surface. When providing the fire-resistant material on the inner surface of the lower connecting pipe 12, the fire-resistant material 18 may be provided by placing a cylindrical tubular fire-resistant material 18 inside the upper part of the lower connecting pipe 12. The fireproof material 18 may be provided on both the upper connecting pipe 11 and the lower connecting pipe 12, or may be provided in a range spanning the lower part of the upper connecting pipe 11 and the upper part of the lower connecting pipe 12.

[0033] The fire-resistant material 18 formed into a cylindrical tube shape may have a single-layer structure made entirely of a single resin composition, or a multi-layer structure made up of multiple layers. When the fire-resistant material 18 has a multi-layer structure, it is sufficient that any one of the layers is formed from a resin composition containing a thermal expansion material. For example, when the fire-resistant material 18 has a three-layer structure consisting of a surface layer, a middle layer, and an inner layer, the middle layer may be formed from a resin composition containing a thermal expansion material.

[0034] The surface layer, intermediate layer, and inner layer may contain a heat-absorbing agent, such as inorganic hydroxides such as magnesium hydroxide, aluminum hydroxide, kaolin minerals (kaolinite, halloysite, dickite), and hydrotalsalcite, and inorganic compounds with water absorption properties such as sepiolite, bentonite, montmorillonite, talc, mica, quartz, zeolite, wollastonite, and nepheline syenite.

[0035] When the intermediate layer contains thermally expandable graphite, the intermediate layer is black, so it is preferable that the surface layer and the inner layer contain a colorant other than black so that they can be distinguished from the intermediate layer. The thickness of the surface layer and the inner layer is preferably 0.3 mm or more and 3.0 mm or less, and more preferably 0.6 mm or more and 1.5 mm or less. If the thickness of the surface layer and the inner layer, i.e., the coating layer, is 0.3 mm or more, the mechanical strength of the inclined pipe section 20 as a pipe can be sufficiently ensured. If the thickness of the coating layer is 3.0 mm or less, the decrease in the fire resistance of the inclined pipe section 20 can be suppressed. The inclined pipe portion 20 preferably satisfies the performance requirements set forth in JIS K6741, Hard Polyvinyl Chloride Pipe.

[0036] In this example, the lower vertical pipe connection portion 21 is a socket. The lower vertical pipe connection portion 21 is configured similarly to the upper vertical pipe connection portion 16. The lower vertical pipe connection portion 21 is provided at the lower end of the inclined pipe portion 20. The lower vertical pipe connection portion 21 can be connected to a second vertical pipe (vertical pipe) P5. The second vertical pipe P5 is a pipe configured similarly to the first vertical pipe P1. The lower vertical pipe connecting portion 21 is formed of the same material as the upper connecting pipe 11. The lower vertical pipe connecting portion may be a spigot, a flange, or the like. The upper connecting pipe 11 and the lower connecting pipe 12 are manufactured separately, and the upper body 15 and the inclined pipe portion 20 are connected to each other with an adhesive or the like. The collecting pipe joint 10 configured as above is made of resin. That is, in this embodiment, the collecting pipe joint 10 is configured by connecting two members, namely, connecting pipes 11 and 12. The collecting pipe joint 10 may be configured with one member, or may be configured with three or more members.

[0037] There is no limitation on the configuration of the upper cover 30. For example, the upper cover 30 includes an upper sound-absorbing cover 31 and an upper sound-insulating cover 32. The upper sound-absorbing cover 31 is formed in a sheet shape that is flat when unfolded. The upper sound-absorbing cover 31 is cylindrical. The upper sound-absorbing cover 31 radially covers the connection part installation part 15b and the part of the joint body 24 above the connection part installation part 15b at Z2 from the outside. The upper sound-absorbing cover 31 is in direct contact with the outer peripheral surface of the joint body 24. The lower end of the upper sound-absorbing cover 31 is located below the connection part installation part 15b at Z1. A through hole 31a is formed in the upper sound-absorbing cover 31 to allow the horizontal pipe connection part 17 to pass through.

[0038] The upper sound-absorbing cover 31 is made of, for example, needle felt. For example, needle felt contains 40% to 50% polyethylene terephthalate, 35% to 45% acrylic fiber, and 10% to 20% wool / rayon. When manufacturing needle felt, barbed needles are inserted into the needle felt to mechanically entangle the fibers. The upper sound absorbing cover 31 may be made of felt such as thermal felt or PET felt, an acrylic fiber mixture, glass wool, rock wool, urethane foam, etc. The density of the upper sound absorbing cover 31 is 80 kg / m 3 The thickness of the upper sound absorbing cover 31 is preferably about 10 mm.

[0039] The upper sound-insulating cover 32 is formed in a sheet shape that is flat when unfolded. The upper sound-insulating cover 32 is cylindrical. The upper sound-insulating cover 32 covers the upper sound-absorbing cover 31 from the radially outer side. The upper sound-insulating cover 32 is in direct contact with the outer peripheral surface of the upper sound-absorbing cover 31. The vertical positions of the lower ends of the upper sound-insulating cover 32 and the upper sound-absorbing cover 31 are equal to each other. The upper sound-insulating cover 32 is formed with a through-hole 32a for passing the horizontal pipe connecting portion 17 therethrough. The through-hole 32a is located radially outward of the through-hole 31a of the upper sound-absorbing cover 31. The thickness of the upper sound-insulating cover 32 is preferably about 1 to 5 mm, and more preferably about 2 mm. The surface density of the upper sound-insulating cover 32 is preferably 1 to 8 kg / m 2 It is preferable that the 2 It is more preferable that the degree of The upper sound-insulating cover 32 is formed from an elastic resin material such as an olefin-based material (a resin composition containing 100 parts by weight of olefin-based resin and 300 to 600 parts by weight of inorganic filler).

[0040] The inorganic filler is not particularly limited, but examples thereof include silica, diatomaceous earth, alumina, zinc oxide, titanium oxide, calcium oxide, magnesium oxide, iron oxide, tin oxide, antimony oxide, ferrites, calcium hydroxide, magnesium hydroxide, aluminum hydroxide, basic magnesium carbonate, calcium carbonate, magnesium carbonate, zinc carbonate, barium carbonate, dawnnite, hydrotalcite, calcium sulfate, barium sulfate, gypsum fiber, calcium silicate, talc, clay, mica, montmorillonite, bentonite, activated clay, sepiolite, imogolite, sericite, glass fiber, glass beads, silica-based balun, aluminum nitride, boron nitride, silicon nitride, carbon black, graphite, carbon fiber, carbon balun, charcoal powder, various metal powders, potassium titanate, magnesium sulfate, lead zirconate titanate, aluminum borate, molybdenum sulfide, silicon carbide, stainless steel fiber, zinc borate, various magnetic powders, slag fiber, fly ash, and dewatered sludge. Of these, calcium carbonate is preferably used as the inorganic filler in view of the balance between weight and cost. These may be used alone or in combination of two or more.

[0041] The olefin resin is not particularly limited, but examples thereof include low-density polyethylene (PE), high-density polyethylene, linear low-density polyethylene, atactic polypropylene, isotactic polypropylene, syndiotactic polypropylene, and poly-α-olefin. 3 The olefin resin is preferably polyethylene having a density of 0.87 g / cm. 3 If the strength of the upper sound-insulating cover 32 is less than 0.93 g / cm 3 If the bending modulus of elasticity of the olefin resin is more than 100 to 3000 kg / cm, there is a risk that the upper sound insulating cover 32 may buckle when flattened. 2 If so, the strength and winding processability are sufficient. The upper sound-insulating cover 32 may be formed from a material other than an olefin-based material, such as polyvinyl chloride resin, polystyrene resin, ABS resin, AS resin, or an elastomer material such as thermoplastic elastomer (TPE).

[0042] There is no limitation on the configuration of the lower cover 35. For example, the lower cover 35 includes a lower sound-absorbing cover 36 and a lower sound-insulating cover 37. The material, thickness, etc. of the lower sound-absorbing cover 36 are configured similarly to those of the upper sound-absorbing cover 31. The lower sound-absorbing cover 36 is cylindrical. The lower sound-absorbing cover 36 covers a portion of the joint body 24, below the portion covered by the upper cover 30, Z1 from the radially outer side. The lower sound-absorbing cover 36 is in direct contact with the outer peripheral surface of the joint body 24. The lower sound-absorbing cover 36 is disposed vertically spaced apart from the upper sound-absorbing cover 31 of the upper cover 30. The material, thickness, etc. of the lower sound-insulating cover 37 are configured similarly to those of the upper sound-insulating cover 32. The lower sound-insulating cover 37 is cylindrical. The lower sound-insulating cover 37 covers the lower sound-absorbing cover 36 from the radially outer side. The lower sound-insulating cover 37 is in direct contact with the outer peripheral surface of the lower sound-absorbing cover 36. The vertical positions of the upper ends of the lower sound-insulating cover 37 and the lower sound-absorbing cover 36 are equal to each other. The lower sound-insulating cover 37 is disposed vertically spaced apart from the upper sound-insulating cover 32 of the upper cover 30.

[0043] Hereinafter, the portion of the joint body 24 that is located between the upper cover 30 and the lower cover 35 in the vertical direction will be referred to as the gap portion 24a. When the gap between the covers 30 and 35 (the vertical length of the gap portion 24a) is 20 mm or more, it is preferable to use the configurations of this embodiment and the second and third embodiments described below.

[0044] The sealing portion 40 covers the lower end of the upper cover 30 and the upper end of the lower cover 35 from the radial outside. More specifically, the sealing portion 40 has a lower sealing member 41, an upper sealing member 42, a reinforcing member 43, and a sound-absorbing cover 44. The lower sealing member 41, the upper sealing member 42, the reinforcing member 43, and the sound-absorbing cover 44 are each formed in a cylindrical shape. The term "cylindrical" used here with respect to the configuration of the sealing portion 40 does not mean a shape formed by, for example, winding a strip-shaped member in the circumferential direction, but rather a shape formed seamlessly in the circumferential direction. The lower sealing member 41, the upper sealing member 42, the reinforcing member 43, and the sound absorbing cover 44 are each disposed coaxially with the axis O1.

[0045] The lower sealing member 41 and the upper sealing member 42 are made of synthetic rubber such as ethylene propylene diene rubber (EPDM). The lower sealing member 41 covers the upper end of the lower cover 35 and the gap portion 24a from the radially outer side. In this example, the lower sealing member 41 is abutted against the upper cover 30 from below Z1 of the upper cover 30. That is, the vertical position of the upper end of the lower sealing member 41 and the vertical position of the upper end of the gap portion 24a are equal to each other.

[0046] The upper sealing member 42 covers the lower end of the upper cover 30 and the portion of the lower sealing member 41 that corresponds to the gap portion 24a in the vertical direction from the radially outer side. The lower end of the upper sealing member 42 is located above the upper end of the lower cover 35 by a distance Z2. The vertical length of the reinforcing member 43 is shorter than the vertical length of the gap portion 24a. The reinforcing member 43 is made of synthetic rubber that exhibits greater elasticity than the lower sealing member 41 and the upper sealing member 42. The Young's modulus (elastic coefficient) of the reinforcing member 43 is preferably greater than the Young's modulus of the lower sealing member 41 and the upper sealing member 42. The reinforcing member 43 covers a portion of the upper sealing member 42 that corresponds to the gap 24a in the vertical direction. In other words, the reinforcing member 43 is disposed within the range of the gap 24a in the vertical direction. The reinforcing member 43 biases the upper sealing member 42 radially inward.

[0047] The material, thickness, etc. of the sound absorbing cover 44 are configured in the same manner as the upper sound absorbing cover 31 . The sound-absorbing cover 44 covers the lower sealing member 41, the reinforcing member 43, and the upper sealing member 42 from the radially outer side. The lower end of the sound-absorbing cover 44 is located at a position Z2 above the lower end of the lower sealing member 41. The upper end of the sound-absorbing cover 44 is located at a position Z1 below the upper end of the upper sealing member 42.

[0048] For example, the sealing portion 40 is disposed in a slab hole 103a of the floor slab 103. The horizontal pipe P3 is disposed at a position Z2 above the floor slab 103. The lower vertical pipe connection portion 21 protrudes below the floor slab 103 at a position Z1 below the floor slab 103. A filler 104 such as mortar is filled between the piping structure 1 and the periphery of the opening of the slab hole 103a in the floor slab 103. In the multi-story building 101, drainage facilities such as toilets (not shown) are provided on the floor 102 above the floor slab 103. The drainage facilities are connected to the first vertical pipe P1 and the horizontal pipe P3.

[0049] Next, the operation of the piping structure 1 configured as above will be described. Wastewater flows from the drainage equipment through the first vertical pipe P1 and horizontal pipe P3 into the collecting pipe joint 10. The wastewater flows downward Z1 while hitting the vertical ribs 15a and the straightening plate 20a inside the collecting pipe joint 10. The wastewater flows from the collecting pipe joint 10 into the second vertical pipe P5 and is drained appropriately. The covers 30, 35 make it difficult for noise generated when wastewater flows through the collecting pipe joint 10 to leak outside the covers 30, 35.

[0050] Next, a description will be given of the flow of water (rainwater) when the piping structure 1 configured as above is installed in the multi-story building 101. At this time, the filler material 104 is filled in the slab holes 103a. When it rains on the multi-story building 101, water (not shown) may accumulate on the floor slab 103. As shown by arrow A1, if this water enters the area radially inward of the upper cover 30 through the portion of the upper cover 30 through which the horizontal pipe connection portion 17 passes, there is a risk that the water will flow out of the covers 30, 35 through the gap between the upper cover 30 and the lower cover 35.

[0051] To address this issue, in the piping structure 1 of this embodiment, the collecting pipe joint 10, to which the first vertical pipe P1 and the horizontal pipe P3 can be connected, can be covered by the upper cover 30 and the lower cover 35. At this time, the upper cover 30 and the lower cover 35 are covered by the cylindrical sealing portion 40. This makes it difficult for water to flow out between the upper cover 30 and the sealing portion 40 and between the lower cover 35 and the sealing portion 40. Therefore, it is possible to prevent water from flowing out between the upper cover 30 and the lower cover 35.

[0052] The sealing portion 40 has a lower sealing member 41 and an upper sealing member 42. As a result, the lower sealing member 41 prevents water from flowing between the joint body 24 and the lower cover 35, and the upper sealing member 42 prevents water from flowing between the upper cover 30 and the lower sealing member 41. The sealing portion 40 has a reinforcing member 43. The reinforcing member 43 biases the portions of the upper sealing member 42 and the lower sealing member 41 that correspond to the gap portion 24a in the vertical direction inward in the radial direction. This makes it possible to prevent water from flowing between the joint body 24 and the lower sealing member 41, and between the lower sealing member 41 and the upper sealing member 42. At this time, the reinforcing member 43 prevents the upper cover 30 (upper sound-absorbing cover 31) and the lower cover 35 (lower sound-absorbing cover 36) from being compressed inward in the radial direction, thereby maintaining vibration-proofing properties.

[0053] The sealing portion 40 has a sound-absorbing cover 44. Therefore, the sound-absorbing cover 44 can absorb sounds, vibrations, and the like generated by wastewater flowing inside the collecting pipe joint 10 and leaking to the outside through the lower sealing member 41, the upper sealing member 42, and the reinforcing member 43. The sealing portion 40 may not have the sound absorbing cover 44, or may not have both the reinforcing member 43 and the sound absorbing cover 44. The sealing portion 40 does not need to have the reinforcing member 43. In this case, the sound-absorbing cover 44 covers the lower sealing member 41 and the upper sealing member 42 from the radially outer side. In the piping structure of this modified example, the sound-absorbing cover 44 can absorb sounds, vibrations, and the like generated by wastewater flowing inside the collecting pipe joint 10 and leaking to the outside through the lower sealing member 41 and the upper sealing member 42.

[0054] (Second embodiment) Next, a second embodiment of the present invention will be described with reference to FIG. 2. The same components as those in the above embodiment are designated by the same reference numerals, and a description thereof will be omitted. Only the differences will be described. As shown in FIG. 2, the piping structure 2 of this embodiment includes a sealing portion 50 instead of the sealing portion 40 in the piping structure 1 of the first embodiment. The sealing portion 50 has a sealing portion main body 51, a reinforcing member 43, and a sound-absorbing cover 44. The sealing portion main body 51 has a gap sealing piece 52, a lower sealing piece 53, and an upper sealing piece 54. The gap sealing piece 52, the lower sealing piece 53, and the upper sealing piece 54 are each formed in a cylindrical shape.

[0055] The vertical length of the gap sealing piece 52 is shorter than the vertical length of the gap 24a. The gap sealing piece 52 covers the gap 24a of the joint body 24 from the radially outer side. The lower sealing piece 53 protrudes downward Z1 from a radially outer portion of the gap sealing piece 52. That is, there is a radial step between the gap sealing piece 52 and the lower sealing piece 53. The lower sealing piece 53 covers the upper end of the lower cover 35 from the radially outer side. The upper sealing piece 54 protrudes upward Z2 from a radially outer portion of the gap sealing piece 52. That is, there is a radial step between the gap sealing piece 52 and the upper sealing piece 54. The upper sealing piece 54 covers the lower end of the top cover 30 from the radially outer side. The gap sealing piece 52, the lower sealing piece 53, and the upper sealing piece 54 that constitute the sealing portion main body 51 are integrally formed from the same material as the sealing members 41 and 42.

[0056] The reinforcing member 43 covers the gap sealing piece 52 from the radially outer side and biases the gap sealing piece 52 radially inward. The sound-absorbing cover 44 covers the sealing portion main body 51 and the reinforcing member 43 from the radially outer side. In this example, the vertical position of the upper end of the sound-absorbing cover 44 and the vertical position of the upper end of the sealing portion main body 51 (upper sealing piece 54) are equal to each other. The vertical position of the lower end of the sound-absorbing cover 44 and the vertical position of the lower end of the sealing portion main body 51 (lower sealing piece 53) are equal to each other.

[0057] In the piping structure 2 of this embodiment configured as described above, it is possible to prevent water from flowing out to the outside through the gap between the upper cover 30 and the lower cover 35. Furthermore, the sealing portion 50 has a sealing portion main body 51 and a reinforcing member 43. By using the reinforcing member 43 to urge the gap sealing piece 52 radially inward, the gap sealing piece 52 can reliably suppress the flow of water on the outer peripheral surface of the joint main body 24. Furthermore, the lower sealing piece 53 and the upper sealing piece 54 can suppress the flow of water on the outer peripheral surfaces of the lower cover 35 and the upper cover 30, respectively. The sealing portion 50 has a sound-absorbing cover 44. Therefore, the sound-absorbing cover 44 can absorb noise, vibrations, and the like generated by wastewater flowing inside the collecting pipe joint 10, which leaks to the outside through the sealing portion main body 51 and the reinforcing member 43.

[0058] 2, the reinforcing member 43 may cover the sealing pieces 53, 54 from the radially outer side and bias the sealing pieces 53, 54 radially inward. With this configuration, the sealing pieces 53, 54 can reliably suppress the flow of water on the outer peripheral surfaces of the covers 30, 35. In this embodiment, the sealing portion 50 does not need to have the sound absorbing cover 44 .

[0059] (Third embodiment) Next, a third embodiment of the present invention will be described with reference to FIG. 3. The same components as those in the previous embodiment are designated by the same reference numerals, and a description thereof will be omitted. Only the differences will be described. As shown in FIG. 3, the piping structure 3 of this embodiment includes a sealing portion 60 instead of the sealing portion 40 in the piping structure 1 of the first embodiment. The sealing portion 60 has a sealing portion main body 61, a reinforcing member 43, and a sound-absorbing cover 44. The sealing portion main body 61 is formed in a cylindrical shape. The sealing portion main body 61 is formed from the same material as the sealing members 41 and 42. The sealing body 61 radially covers the lower end of the upper cover 30, the gap 24a of the joint body 24, and the upper end of the lower cover 35. The vertical middle portion of the sealing body 61 has smaller outer and inner diameters than the upper and lower ends of the sealing body 61, so as to conform to the shape of the gap 24a relative to the covers 30 and 31.

[0060] The reinforcing member 43 covers from the radially outer side a portion of the sealing portion main body 61 that corresponds to the gap portion 24a. The reinforcing member 43 biases the sealing portion main body 61 radially inward. The sound absorbing cover 44 covers the sealing portion main body 61 and the reinforcing member 43 from the radially outer side. In this example, the upper end of the sound absorbing cover 44 is located Z1 below the upper end of the sealing body 61. The lower end of the sound absorbing cover 44 is located Z2 above the lower end of the sealing body 61.

[0061] In the piping structure 3 of this embodiment configured as described above, it is possible to prevent water from flowing out through the gap between the upper cover 30 and the lower cover 35 to the outside. Furthermore, the sealing portion 60 has a sealing portion main body 61 and a reinforcing member 43. Therefore, the sealing portion main body 61 can prevent water from flowing between the joint body 24 and the upper cover 30, and between the joint body 24 and the lower cover 35. Furthermore, the reinforcing member 43 can reliably prevent water from flowing between the joint body 24 and the sealing portion main body 61. At this time, the reinforcing member 43 can prevent the upper cover 30 and the lower cover 35 from being compressed radially inward.

[0062] The sealing portion 60 has a sound-absorbing cover 44. Therefore, the sound-absorbing cover 44 can absorb sounds, vibrations, and the like generated by wastewater flowing inside the collecting pipe joint 10, which leak to the outside through the sealing portion main body 61 and the reinforcing member 43. The sealing portion 60 does not necessarily have to have the sound absorbing cover 44 .

[0063] (Fourth embodiment) Next, a fourth embodiment of the present invention will be described with reference to FIG. 4. The same components as those in the previous embodiment are designated by the same reference numerals, and the description thereof will be omitted. Only the differences will be described. As shown in FIG. 4, the piping structure 4 of this embodiment includes a sealing portion 40A instead of the sealing portion 40 in the piping structure 1 of the first embodiment. The sealing unit 40A has a lower sealing member 41, an upper sealing member 42, a reinforcing member 43, and a sound-absorbing cover 44. That is, like the sealing unit 40, the sealing unit 40A has the lower sealing member 41, the upper sealing member 42, the reinforcing member 43, and the sound-absorbing cover 44, but the arrangement of these components is different from that of the sealing unit 40.

[0064] The lower sealing member 41 covers the upper end of the lower cover 35 and the gap portion 24a of the joint body 24 from the radial outside, and is disposed between the joint body 24 and the lower end of the upper cover 30. The upper sealing member 42 covers the lower end of the upper cover 30 and the lower sealing member 41. In this example, the lower end of the upper sealing member 42 is located above the lower end of the lower sealing member 41 by Z2. The reinforcing member 43 covers from the radially outer side a portion of the upper sealing member 42 that corresponds to the gap portion 24a. The reinforcing member 43 biases the upper sealing member 42 radially inward. The sound-absorbing cover 44 covers the upper sealing member 42 and the reinforcing member 43 from the radially outer side. In this example, the lower end of the sound-absorbing cover 44 is located at a position Z2 above the lower end of the upper sealing member 42. The upper end of the sound-absorbing cover 44 is located at a position Z1 below the upper end of the upper sealing member 42. When the gap between the covers 30 and 35 is 5 mm or less, it is preferable to use the configuration of this embodiment.

[0065] In the piping structure 4 of this embodiment configured as described above, it is possible to prevent water from flowing out to the outside through the gap between the upper cover 30 and the lower cover 35. Furthermore, the lower sealing member 41 prevents water from flowing between the joint body 24 and the lower cover 35 over a wider area in the vertical direction than in the first embodiment, and the upper sealing member 42 prevents water from flowing between the upper cover 30 and the lower sealing member 41. The reinforcing member 43 prevents water from flowing between the joint body 24 and the lower sealing member 41. At this time, the reinforcing member 43 can prevent the upper cover 30 and the lower cover 35 from being compressed radially inward.

[0066] The sealing portion 40A has a sound-absorbing cover 44. This allows the sound-absorbing cover 44 to absorb noise, vibrations, and the like generated by wastewater flowing inside the collecting pipe joint 10 and leaking to the outside through the lower sealing member 41, the upper sealing member 42, and the reinforcing member 43. The sealing portion 40A does not necessarily have to have the sound absorbing cover 44.

[0067] Although the first to fourth embodiments of the present invention have been described above in detail with reference to the drawings, the specific configurations are not limited to these embodiments, and the present invention also includes modifications, combinations, deletions, etc. of the configurations within the scope of the gist of the present invention. Furthermore, it goes without saying that the configurations shown in each embodiment can be used in appropriate combinations. For example, in the first to fourth embodiments, the piping structures 1, 2, 3, and 4 do not necessarily have to include the vertical ribs 15a and the flow straightening plates 20a. The position at which the lower sealing member 41, gap sealing piece 52 or sealing portion main body 61 in contact with the outer surface of the collecting pipe joint 10 is provided within the sealing portion 40 may be a position spanning the lower end of the upper connecting pipe 11 and the upper end of the lower connecting pipe 12, as in this embodiment, or it may be only on the outer surface of the lower part of the upper connecting pipe 11, or it may be only on the outer surface of the upper part of the lower connecting pipe 12. [Explanation of symbols]

[0068] 1,2,3,4 Piping structure 10 Collector joint 16 Upper vertical pipe connection (vertical pipe connection) 17 Horizontal pipe connection 21 Lower vertical pipe connection (vertical pipe connection) 24 Joint body 24a Gap part 30 Upper cover 35 Lower cover 40,40A,50,60 Sealing part 41 Lower sealing member 42 Upper sealing member 43 Reinforcement member 44 Sound-absorbing cover 51,61 Sealing body 52 Gap sealing piece 53 Lower sealing piece 54 Upper sealing piece P1 First vertical pipe (vertical pipe) P3 horizontal pipe P5 Second vertical pipe (vertical pipe)

Claims

1. a joint body having a vertical pipe connection portion connectable to a vertical pipe, and a collecting pipe joint having a horizontal pipe connection portion protruding from an outer peripheral surface of the joint body and connectable to a horizontal pipe; an upper cover that covers an upper portion of the joint body; a lower cover that covers a portion of the joint body below a portion covered by the upper cover and is disposed vertically apart from the upper cover; a cylindrical sealing portion that covers the upper cover and the lower cover; Equipped with The sealing portion is a cylindrical lower sealing member that covers the lower cover and a gap portion of the joint body that is located between the upper cover and the lower cover; a cylindrical upper sealing member that covers the upper cover and the lower sealing member; A piping structure having:

2. a joint body having a vertical pipe connection portion connectable to a vertical pipe, and a collecting pipe joint having a horizontal pipe connection portion protruding from an outer peripheral surface of the joint body and connectable to a horizontal pipe; an upper cover that covers an upper portion of the joint body; a lower cover that covers a portion of the joint body below a portion covered by the upper cover and is disposed vertically apart from the upper cover; a cylindrical sealing portion that covers the upper cover and the lower cover; Equipped with The sealing portion is a sealing portion main body including a cylindrical gap sealing piece that covers a portion of the joint main body that is located between the upper cover and the lower cover, a cylindrical lower sealing piece that protrudes downward from the gap sealing piece and covers the lower cover, and a cylindrical upper sealing piece that protrudes upward from the gap sealing piece and covers the upper cover; a cylindrical reinforcing member that covers the gap sealing piece and urges the gap sealing piece inward; A piping structure having:

3. a joint body having a vertical pipe connection portion connectable to a vertical pipe, and a collecting pipe joint having a horizontal pipe connection portion protruding from an outer peripheral surface of the joint body and connectable to a horizontal pipe; an upper cover that covers an upper portion of the joint body; a lower cover that covers a portion of the joint body below a portion covered by the upper cover and is disposed vertically apart from the upper cover; a cylindrical sealing portion that covers the upper cover and the lower cover; Equipped with The sealing portion is a cylindrical sealing portion main body covering the upper cover, a gap portion of the joint main body located between the upper cover and the lower cover, and the lower cover; a cylindrical reinforcing member that covers a portion of the sealing body corresponding to the gap and biases the sealing body inward; A piping structure having:

4. a joint body having a vertical pipe connection portion connectable to a vertical pipe, and a collecting pipe joint having a horizontal pipe connection portion protruding from an outer peripheral surface of the joint body and connectable to a horizontal pipe; an upper cover that covers an upper portion of the joint body; a lower cover that covers a portion of the joint body below a portion covered by the upper cover and is disposed vertically apart from the upper cover; a cylindrical sealing portion that covers the upper cover and the lower cover; Equipped with The sealing portion is a cylindrical lower sealing member that covers the lower cover and a gap between the upper cover and the lower cover in the joint body and is disposed between the joint body and the upper cover; a cylindrical upper sealing member that covers the upper cover and the lower sealing member; a cylindrical reinforcing member that covers a portion of the upper sealing member corresponding to the gap and biases the upper sealing member inward; A piping structure having:

5. The piping structure according to claim 1 , wherein the sealing portion includes a cylindrical reinforcing member that covers a portion of the upper sealing member that corresponds to the gap and biases the upper sealing member inward.

6. The piping structure according to claim 5 , wherein the sealing portion has a cylindrical sound-absorbing cover that covers the lower sealing member, the reinforcing member, and the upper sealing member.

7. The piping structure according to claim 1 , wherein the sealing portion has a cylindrical sound-absorbing cover that covers the lower sealing member and the upper sealing member.

8. The piping structure according to claim 2 , wherein the sealing portion has a cylindrical sound-absorbing cover that covers the sealing portion main body and the reinforcing member.

9. The piping structure according to claim 3 , wherein the sealing portion has a cylindrical sound-absorbing cover that covers the sealing portion main body and the reinforcing member.

10. The piping structure according to claim 4 , wherein the sealing portion has a cylindrical sound-absorbing cover that covers the upper sealing member and the reinforcing member.

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