Collective joint

Abstract

To provide a collective joint having reduced noise to be generated by liquid.SOLUTION: A collective joint 25 includes a joint body 26 having an axial line O1 arranged along the vertical direction, a blade unit 51 having a blade support part 55 arranged on the inner peripheral face of the joint body 26 and a turning blade 56 protruded from the blade support part 55 to the radial inside, and a fixing part 81 for fixing the joint body 26 and the blade support part 55 to each other with at least one of adhesion and fitting.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a mass joint. [Background technology]

[0002] Conventionally, in order to provide a collective joint with swirl vanes, it is known to configure the collective joint by fitting a joint body and a vane unit that are separately formed together (see, for example, Patent Document 1). The blade unit has a vertical pipe connection portion, a protrusion portion, a blade support portion, and a swirl blade.

[0003] The lower end of the vertical pipe connecting portion is fitted onto the inner circumferential surface of the upper end of the joint body. The protrusion is provided on the inner circumferential surface of the lower end of the vertical pipe connecting portion so as to protrude radially inward. The blade support portion extends downward from a lower end of the vertical pipe connection portion. The swirl blades are provided on an inner circumferential surface of the blade support portion so as to protrude radially inward. The lower end of the vertical pipe is disposed in the vertical pipe connection portion. At this time, the vertical pipe is engaged with the protruding portion from above the protruding portion via a packing.

[0004] Wastewater (liquid) flowing out of the drainage system flows into the manifold through the vertical pipe. The wastewater hits the swirl vanes and flows downward inside the body of the manifold while rotating around the axis. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2019-112869 A Summary of the Invention [Problem to be solved by the invention]

[0006] In conventional manifold joints, the joint body and the vertical pipe connection part of the blade unit are fixed to each other by an adhesive (fixing part). In this case, the swirl blades that are mainly hit by the wastewater in the manifold joint are relatively far away from the vertical pipe connection part to which they are fixed. For this reason, there is a risk that the noise generated by the swirl blades, etc. will be large.

[0007] The present invention has been made in consideration of such problems, and an object of the present invention is to provide a collective joint that reduces noise generated by liquid. [Means for solving the problem]

[0008] In order to solve the above problems, the present invention proposes the following means. (1) A first aspect of the present invention is an assembly joint comprising: a joint body arranged with its axis aligned in the up-down direction; a blade support part arranged on the inner circumferential surface of the joint body; a blade unit having swirl blades protruding radially inward from the blade support part; and a fixing part that fixes the joint body and the blade support part to each other by at least one of adhesion, fitting, and shrink fitting.

[0009] In this invention, for example, liquid that flows into the joint body through a vertical pipe connected to the joint body hits the swirl vane, so that the liquid can flow downward within the joint body while being swirled around the axis by the swirl vane. Since the fixing part fixes the joint body and the blade support part to each other by at least one of adhesion, engagement, and tight fit, the swirl vanes can be fixed to the joint body via the blade support part arranged on the inner peripheral surface of the joint body. Since the fixing part fixes the swirl vanes to the joint body at the blade support part that is closer to the swirl vanes than the vertical pipe connection part of Patent Document 1, the swirl vanes, which mainly generate noise, can be more reliably fixed to the joint body, and noise generated by the liquid can be reduced.

[0010] (2) A second aspect of the present invention may be the collective joint described in (1), in which the fixing portion is an adhesive portion that fixes the joint body and the blade support portion to each other by the adhesion. In the present invention, the joint body and the blade support part can be fixed to each other by an adhesive joint using adhesive.

[0011] (3) A third aspect of the present invention may be the collective joint according to (1) or (2), in which the blade support portion is press-fitted into the joint body. In this invention, the joint body and the blade support portion can be pressed against each other in the radial direction, and the joint body and the blade support portion can be fixed to each other more reliably by the adhesive portion.

[0012] (4) A fourth aspect of the present invention may be the collective joint described in (1), wherein the fixing portion is a fitting portion that is provided on the joint body and fits into the blade support portion to fix the joint body and the blade support portion to each other by the fitting. In this invention, the joint body and the blade support portion can be fixed to each other by the fitting portion which is fitted together.

[0013] (5) A fifth aspect of the present invention may be the collective joint described in (4), wherein the fitting portion has a first piece protruding radially inward from the joint body and arranged on a first circumferential side relative to the blade support portion, and a second piece protruding from an end of the first piece on the radially inner side toward a second circumferential side and sandwiching the blade support portion together with the joint body in the radial direction. In this invention, the joint body and the blade support part can be fixed to each other by fitting a relatively simple structure, that is, a fitting part having a first piece and a second piece, into the blade support part.

[0014] (6) A sixth aspect of the present invention may be the collective joint described in any one of (1) to (5), wherein the blade unit has a vertical pipe connection portion fitted into an inner peripheral surface of an upper end portion of the joint body, and the blade support portion is connected to the vertical pipe connection portion. In this invention, by fitting the vertical pipe connection portion of the blade unit into the inner peripheral surface of the upper end portion of the joint body, the swirl blade can be disposed at a desired position within the joint body via the blade support portion.

[0015] (7) A seventh aspect of the present invention may be the collective joint according to any one of (1) to (6), in which the blade support portion and the swirl blade are integrally configured. In the present invention, the blade support portion and the swirl blade can be integrally formed by, for example, injection molding.

[0016] (8) An eighth aspect of the present invention may be the collective joint described in (1), in which the fixing portion fixes the joint body and the blade support portion to each other by the interference fit in the radial direction. In the present invention, the fixing portion enables the joint body and the blade support portion to be fixed to each other by radial interference fit.

[0017] (9) A ninth aspect of the present invention may be the collective joint described in (1), in which the fixing portion fixes the joint body and the blade support portion to each other by the interference fit in the axial direction. In the present invention, the fixing portion enables the joint body and the blade support portion to be fixed to each other by axial interference fit.

[0018] (10) A tenth aspect of the present invention may be a collective joint as described in any one of (1) to (9), in which the swirl vane is disposed at an end of the blade support part in the axial direction, the blade unit has a second blade support part disposed on the opposite side of the blade support part in the axial direction across the swirl vane, and the joint body and the second blade support part are fixed to each other by at least one of adhesion, engagement, and shrink fitting. In this invention, in addition to the blade support part, the second blade support part is fixed to the joint body by at least one of adhesive bonding, fitting, and press fitting, so that the swirl blades, which mainly generate noise, can be more securely fixed to the joint body.

[0019] (11) An eleventh aspect of the present invention may be the collective joint according to (10), further comprising a second reinforcing portion connected to the swirl vane and the second blade support portion, respectively. In this aspect of the invention, the second reinforcing portion can more reliably connect the swirl vane and the second blade support portion to each other.

[0020] (12) A twelfth aspect of the present invention may be the collective joint according to (11), in which the second reinforcing portion is formed in a plate shape whose thickness direction is along the circumferential direction. In this invention, for example, when the volume of the second reinforcing portion is constant, it is possible to efficiently suppress deformation of the swirl vane in the axial direction relative to the second blade support portion.

[0021] (13) A thirteenth aspect of the present invention is a collective joint comprising: a joint body arranged such that its axis is aligned in the up-down direction; a blade support part arranged on an inner peripheral surface of the joint body; a blade unit having swirl blades protruding radially inward from the blade support part; and a reinforcing part provided on the blade support part to reinforce the blade support part.

[0022] In this invention, for example, liquid that flows into the joint body through a vertical pipe connected to the joint body hits the swirl vane, so that the liquid can flow downward within the joint body while being swirled around the axis by the swirl vane. Since the reinforcing portion that reinforces the blade support portion is provided at the blade support portion closer to the swirl blades than the vertical pipe connection portion of Patent Document 1, the vibration of the blade support portion that supports the swirl blades, which is where the noise mainly comes from, can be further suppressed, and the noise generated by the liquid can be reduced.

[0023] (14) A fourteenth aspect of the present invention may be the collective joint described in (13), wherein the blade unit has a body connecting part connected to an end of the blade support part and attachable to the joint body, and the reinforcing part protrudes in the circumferential direction from the circumferential end of the blade support part so as to be spaced away from the blade support part, and is connected to the body connecting part. In this invention, the body connection part can be attached to the joint body together with the blade support part and the swirl vane, and the blade support part can be reinforced by the reinforcing part so as not to interfere with the liquid flowing through the joint body.

[0024] (15) A fifteenth aspect of the present invention may be the collective joint described in (14), which includes two reinforcing parts, and the two reinforcing parts each protrude in the circumferential direction from an end of the blade support part in the circumferential direction. In this invention, the blade support portion can be reinforced more efficiently by the two reinforcing portions.

[0025] (16) A sixteenth aspect of the present invention may be the collective joint described in (14), in which, when viewed in the radial direction facing the reinforcing portion, the outer edge of the reinforcing portion is formed in an arc shape. In this invention, for example, when an external force due to liquid acts on the swirl vane, it is possible to prevent stress due to the external force from concentrating on the reinforcing parts connected to the vane support part and the main body connection part, respectively. Effect of the Invention

[0026] The collective joint of the present invention can reduce noise generated by liquid. [Brief description of the drawings]

[0027] [Figure 1] 1 is a cross-sectional front view of a piping structure in which a collective joint according to a first embodiment of the present invention is used. [Diagram 2] 4 is a cross-sectional view showing a front view of the main parts of the assembly joint after disassembly and movement. FIG. [Diagram 3] FIG. 2 is an exploded perspective view of the main part of the assembly joint. [Figure 4] FIG. 2 is a cross-sectional view of the collective joint as viewed from above. [Diagram 5] 10 is a cross-sectional front view of a main portion of a collective joint in a first modified example of the first embodiment of the present invention. FIG. [Figure 6] FIG. 6 is a cross-sectional front view of a main portion of a group joint according to a second embodiment of the present invention. [Figure 7] FIG. 2 is a cross-sectional plan view of a main part of the collective joint. [Figure 8] 13 is a cross-sectional front view of a main portion of a collective joint in a first modified example of the second embodiment of the present invention. FIG. [Figure 9] 13 is a cross-sectional front view of a main portion of a collective joint in a second modified example of the second embodiment of the present invention. FIG. [Figure 10] 13 is a cross-sectional front view of a main portion of a collective joint in a third modified example of the second embodiment of the present invention. FIG. [Figure 11] FIG. 11 is a cross-sectional front view of a main portion of a group joint according to a third embodiment of the present invention. [Figure 12] FIG. 13 is a cross-sectional front view of a main portion of a collective joint in a first modified example of the third embodiment of the present invention. [Figure 13] FIG. 13 is a cross-sectional front view of a main portion of a collective joint in a second modified example of the third embodiment of the present invention. [Figure 14] FIG. 13 is a cross-sectional front view of a main portion of a collective joint in a third modified example of the third embodiment of the present invention. [Figure 15] 13 is a cross-sectional front view of a main portion of a collective joint in a fourth modified example of the third embodiment of the present invention. FIG. [Figure 16] FIG. 13 is a perspective view of a main portion of a group joint according to a fourth embodiment of the present invention. [Figure 17] FIG. 13 is a perspective view of a main portion of a group joint in a first modified example of the fourth embodiment of the present invention. [Figure 18] FIG. 13 is a cross-sectional front view of a main portion of a group joint according to a fifth embodiment of the present invention. [Figure 19] FIG. 2 is a cutaway perspective view of a main part of the same collective joint. [Figure 20] FIG. 2 is a cutaway perspective view of the unit body of the assembly joint as viewed from a predetermined direction. [Figure 21] 13 is a perspective view of the unit body of the same assembly joint, broken away as viewed from a different direction. FIG. [Figure 22] FIG. 23 is a cutaway perspective view of a unit body of a group joint in a first modified example of the fifth embodiment of the present invention. [Figure 23]13 is a perspective view of the main part of the unit body seen from a different direction. FIG. [Figure 24] FIG. 23 is a perspective view of a unit body of a collective joint in a second modified example of the fifth embodiment of the present invention. [Diagram 25] 25 is a cross-sectional view taken along line A1-A1 in FIG. 24. [Figure 26] FIG. 23 is a side view of a unit body of a collective joint in a third modified example of the fifth embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0028] (First embodiment) A piping structure in which a first embodiment of a collective joint according to the present invention is used will be described below with reference to Figures 1 to 4. Note that in Figure 2 and subsequent figures, the configuration other than the main parts of the collective joint may be shown in a simplified or slightly different configuration. As shown in Fig. 1, this piping structure 1 includes a first vertical pipe 10, a second vertical pipe 15, a horizontal pipe 20, and a joint assembly 25 of this embodiment. In Fig. 1, the vertical pipes 10, 15 and the horizontal pipe 20 are indicated by two-dot chain lines.

[0029] The vertical pipes 10, 15 and the horizontal pipe 20 are formed into a tubular shape from polyvinyl chloride resin or the like. The first vertical pipe 10 and the second vertical pipe 15 extend in the up-down direction. Here, "A extends along B" means that the angle between A and B is 30 degrees or less. It is more preferable that this angle is 15 degrees or less. The first vertical pipe 10 is disposed above the second vertical pipe 15. The lower end of the collective joint 25 on the upper floor is connected to the upper end of the first vertical pipe 10. The lower end of the second vertical pipe 15 is connected to the upper end of the collective joint 25 on the lower floor and a leg joint (not shown). The horizontal pipe 20 is disposed along a horizontal plane with a water gradient. A drainage facility is connected to a first end of the horizontal pipe 20.

[0030] 1 to 4, the collective joint 25 has a joint body 26, a horizontal pipe connection portion 47, a blade unit 51, and an adhesive portion (fixing portion) 81. Note that in Figs. 2 and 3, the portions fixed to each other by adhesion are hatched. Here, the joint body 26 and the blade unit 51 are formed in a cylindrical shape. The central axes of the joint body 26 and the blade unit 51 are arranged coaxially with a common axis. Hereinafter, the common axis is referred to as the axis O1. The direction along the axis O1 is referred to as the axis O1 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.

[0031] The joint body 26 has an upper joint body 27, a connecting pipe 37, and a lower joint body 42. The upper joint body 27 and the horizontal pipe connecting portion 47 configure an upper joint unit 27A. The upper joint body 27 has an upper body 28 , a locking portion 29 , a vertical rib 30 , and a horizontal rib 31 . The upper body 28 is formed in a cylindrical shape and is disposed on the axis O1. An opening 28a penetrating the peripheral wall of the upper body 28 is formed in the middle part in the vertical direction of the upper body 28. The number of openings 28a formed in the upper body 28 is not limited. The locking portion 29 is provided at the upper end of a portion of the inner circumferential surface of the upper main body 28 that is below the opening 28a. The locking portion 29 is formed in an annular shape and protrudes radially inward from the upper main body 28. A surface 29a of the locking portion 29 facing radially inward is inclined so as to gradually approach the axis O1 as it extends downward. The portion of the inner circumferential surface of the upper body 28 above the locking portion 29, excluding the upper end portion, is a body-side bonding surface 28b that is bonded to a blade support portion 55 (described later) of the blade unit 51 (see FIGS. 2 and 3).

[0032] 1, the vertical rib 30 is provided on the inner peripheral surface of the upper body 28 and extends in the vertical direction. The vertical rib 30 is formed in a range corresponding to the opening 28a and the locking portion 29 in the vertical direction. The lateral rib 31 is provided on the outer circumferential surface of the upper body 28, in a portion above the opening 28a. The lateral rib 31 extends in the circumferential direction. For example, the lateral rib 31 is provided to hold the upper body 28. An annular sealing member 32 is disposed in a portion of the upper body 28 below the locking portion 29. The sealing member 32 is locked to the locking portion 29 from below the locking portion 29.

[0033] The connection pipe 37 is formed in a cylindrical shape and is disposed on the axis O1. The connecting pipe 37 is preferably made of a polyvinyl chloride resin and contains a resin composition containing a polyvinyl chloride resin and thermally expandable graphite. That is, the connecting pipe 37 is produced by molding the resin composition. Usually, the connecting pipe 37 is produced by extrusion molding or injection molding the resin composition. The connecting pipe 37 may have a single-layer structure in which the entire connecting pipe 37 is made of a resin composition, or may have a multi-layer structure made of multiple layers. In the case of a multi-layer structure, any one of the layers may be formed from a resin composition. For example, when the connecting pipe 37 has a three-layer structure consisting of a surface layer, an intermediate layer, and an inner layer, the intermediate layer may be formed from a resin composition, and the surface layer, the intermediate layer, and the inner layer may contain a heat absorbing agent. In addition, when the connecting pipe 37 does not contain thermally expandable graphite, a sheet-like fire-resistant material containing thermally expandable graphite may be wrapped around the outer surface of the connecting pipe 37 or the outer surface of the sound-proofing material covering the connecting pipe 37, and the fire-resistant material may be embedded in a slab penetration hole in the floor slab (not shown).

[0034] As an example, a single-layer structure made of a resin composition containing 1 to 20 parts by weight of thermally expandable graphite per 100 parts by weight of polyvinyl chloride resin can be used. Alternatively, a three-layer structure made of a thermally expandable fire-resistant layer made of a resin composition containing 1 to 20 parts by weight of thermally expandable graphite per 100 parts by weight of polyvinyl chloride resin and a coating layer of a polyvinyl chloride resin composition not containing thermally expandable graphite that covers the inner and outer surfaces of the thermally expandable fire-resistant layer can be used.

[0035] When the connecting pipe 37 has a single-layer structure, if the amount of thermally expandable graphite is less than 1 part by weight, sufficient thermal expansion may not be obtained during combustion, and the desired fire resistance may not be obtained. If the amount of thermally expandable graphite exceeds 20 parts by weight, the graphite may expand too much when heated, and may not be able to maintain its shape, causing residues to fall out of the slab through-holes, resulting in reduced fire resistance.

[0036] When the connecting pipe 37 has a multi-layer structure, the resin composition containing the thermally expandable fire-resistant material is not particularly limited, but is preferably one containing 1 to 20 parts by weight of thermally expandable graphite per 100 parts by weight of polyvinyl chloride resin. The content of the thermally expandable graphite is more preferably 4 to 18 parts by weight, and even more preferably 6 to 16 parts by weight. If the connecting pipe 37 is present throughout the entire slab penetration hole, even if the content of thermally expandable graphite is relatively high at 15 parts by weight or more and the residue is brittle, the residue will block the entire slab penetration hole, and the residue after thermal expansion will be held inside the floor slab, making it difficult to fall off. For this reason, the length of the connecting pipe 37 in the tube axis direction is set to 100 mm or more, preferably 140 mm or more, and most preferably 160 mm or more.

[0037] When the intermediate layer contains thermally expandable graphite, the intermediate layer is black in color, and therefore it is preferable that the surface layer and the inner layer contain a colorant other than black so as to be distinguishable from the intermediate layer. The thickness of the surface layer and the inner layer is preferably 0.3 mm to 3.0 mm, and more preferably 0.6 mm to 1.5 mm. If the thickness of the coating layer is 0.3 mm or more, the mechanical strength of the pipe can be sufficiently ensured, and if it is 3.0 mm or less, the decrease in fire resistance can be suppressed. Moreover, it is preferable that the connection pipe 37 satisfies the performance requirements set forth in JIS K6741. That is, if the amount of thermally expandable graphite is less than 1 part by weight, sufficient thermal expansion is not obtained during combustion, and the desired fire resistance may not be obtained.If the amount of thermally expandable graphite is more than 20 parts by weight, the graphite may expand too much when heated, and the shape may not be maintained, causing residues to fall out of the slab through-holes, resulting in reduced fire resistance.

[0038] The thermally expandable graphite used in the present embodiment can be, for example, a crystalline compound obtained by treating powder of natural scaly graphite, pyrolytic graphite, kish graphite, or the like with an inorganic acid and a strong oxidizing agent to insert the inorganic acid between the layers of the graphite, followed by pH adjustment. As the inorganic acid, concentrated sulfuric acid, nitric acid, selenic acid, etc. can be used. As the strong oxidizing agent, concentrated nitric acid, perchloric acid, perchlorates, permanganates, dichromates, hydrogen peroxide, etc. can be used.

[0039] By adjusting the pH, it is possible to use thermally expandable graphite which is a crystalline compound that maintains the layered structure of carbon and has a pH adjusted to 1.5 to 7.0, and thermally expandable graphite having a 1.3-fold expansion temperature of 180°C to 280°C.

[0040] If the pH of the thermally expandable graphite is less than 1.5, the acidity is too strong and the molding equipment is likely to corrode, and if the pH exceeds 7.0, the effect of promoting the carbonization of the polyvinyl chloride resin will be weakened, and sufficient fire resistance may not be obtained. The particle size of the thermally expandable graphite is not particularly limited, but may be, for example, in the range of 100 to 400 μm, and preferably in the range of 120 to 350 μm.

[0041] The resin composition constituting the connecting pipe 37 may contain additives such as stabilizers, inorganic fillers, flame retardants, lubricants, processing aids, impact modifiers, heat resistance improvers, antioxidants, light stabilizers, UV absorbers, pigments, plasticizers, thermoplastic elastomers, etc., as necessary, within the scope that does not impair the object of this embodiment.

[0042] An upper end of the connecting pipe 37 is disposed within the lower end of the upper body 28 of the upper joint body 27. The connecting pipe 37 is engaged with the engaging portion 29 of the upper body 28 from below the engaging portion 29 via the sealing member 32. The connecting pipe 37 protrudes downward from the upper body 28 . The connecting pipe 37 is fixed to the upper body 28 by adhesive or the like.

[0043] The lower joint body 42 has a lower body 43, a connection portion 44, and a lower vertical pipe connection portion 45. The lower body 43, the connection portion 44, and the lower vertical pipe connection portion 45 are each formed in a cylindrical shape and disposed on the axis O1. The inner and outer diameters of the lower body 43 gradually decrease from top to bottom. The connection part 44 is fixed to the outer circumferential surface of the upper end part of the lower main body 43. The connection part 44 protrudes upward from the lower main body 43. The lower vertical pipe connecting portion 45 is fixed to the outer circumferential surface of the lower end portion of the lower main body 43. The lower vertical pipe connecting portion 45 protrudes downward from the lower main body 43.

[0044] The lower body 43, the connection portion 44, and the lower vertical pipe connection portion 45 of the lower joint body 42 are integrally formed from polyvinyl chloride resin or the like. The lower end of the connection pipe 37 is disposed within the connection portion 44 of the lower joint body 42. The connection pipe 37 is fixed to the connection portion 44 by adhesive or the like. The joint body 26 configured as above is disposed so that its own axis O1 extends along the vertical direction.

[0045] 1 to 4, the horizontal pipe connecting part 47 is formed in a cylindrical shape. The horizontal pipe connecting part 47 is disposed so that the axis O2 of the horizontal pipe connecting part 47 is along a horizontal plane. The horizontal pipe connecting part 47 is connected to the peripheral part of the opening 28a in the upper main body 28. The upper joint body 27 and the horizontal pipe connecting portion 47 of the upper joint unit 27A are integrally formed from polyvinyl chloride resin or the like.

[0046] The blade unit 51 is fitted to the upper end of the joint body 26. The blade unit 51 has a unit body 52, a seal member 62, and a pressing member 72. As shown in Figures 1 to 4, the unit body 52 has an upper vertical pipe connection portion (vertical pipe connection portion, body connection portion) 53, a protrusion 54, a blade support portion (first blade support portion) 55, a swirl blade 56, a first protrusion portion 57, and a second protrusion portion 58.

[0047] 1, the upper vertical pipe connecting portion 53 has a large diameter portion 53a and a small diameter portion 53b. The large diameter portion 53a and the small diameter portion 53b are each formed in a cylindrical shape and are disposed on the axis O1. The inner and outer diameters of the large diameter portion 53a are approximately the same as the inner and outer diameters of the upper body 28 of the upper joint body 27. The outer diameter of the small diameter portion 53b is approximately the same as the inner diameter of the upper body 28 of the upper joint body 27. The small diameter portion 53b is fixed to the inner circumferential surface of the lower end portion of the large diameter portion 53a. The small diameter portion 53b protrudes downward from the large diameter portion 53a. The small diameter portion 53b is fitted into the inner circumferential surface of the upper end portion of the upper joint body 27 of the joint body . The upper vertical pipe connection portion 53 is attached to the joint body 26 by adhesive.

[0048] The protruding portion 54 is provided so as to protrude radially inward on the inner circumferential surface of the lower end portion of the small diameter portion 53b of the upper vertical pipe connecting portion 53. The protruding portion 54 is formed in an annular shape and is formed around the entire circumference of the small diameter portion 53b. The protrusion 54 may be formed only partially in the circumferential direction. 1 to 4, the blade support part 55 extends downward from a part of the circumferential direction at the lower end part of the small diameter part 53b of the upper vertical pipe connecting part 53. That is, the upper vertical pipe connecting part 53 is connected to the upper end part of the blade support part 55. The blade support part 55 is formed in a curved flat plate shape, and is formed in an arc shape when viewed in the vertical direction. The blade support part 55 extends in the vertical direction. In other words, the circumferential length of the blade support part 55 is almost constant regardless of the position in the vertical direction. The blade support part 55 is connected to the upper vertical pipe connection part 53.

[0049] 1, the lower end of the blade support portion 55 extends gradually further downward toward a first circumferential side (hereinafter simply referred to as the first side) D1. Hereinafter, the side opposite to the first side D1 in the circumferential direction will be referred to as a second circumferential side (hereinafter simply referred to as the second side) D2. As shown in FIG. 4, the blade support portion 55 is disposed radially inside the upper body 28 (on the inner circumferential surface of the joint body 26), and almost no gap is formed between the upper body 28 and the blade support portion 55. The outer peripheral surface (surface facing radially outward) of the blade support portion 55 is a support portion-side bonding surface 55a that is bonded to the main body-side bonding surface b of the upper main body . When viewed in the vertical direction, the radius of curvature of the support-side bonding surface 55a of the upper body 28 and the radius of curvature of the body-side bonding surface 28b of the blade support part 55 are equal to each other. In other words, when viewed in the vertical direction, the support-side bonding surface 55a and the body-side bonding surface 28b are disposed on a predetermined reference arc.

[0050] 1 to 4, the swirl vane 56 is formed, for example, in the shape of a curved plate, and is provided on an inner peripheral surface (surface facing radially inward) 55b of the lower end of the blade support part 55. The swirl vane 56 protrudes radially inward from the blade support part 55. As shown in Fig. 1, an upper surface 56a of the swirl vane 56 is gradually inclined downward as it approaches the first side D1.

[0051] The first protrusion 57 and the second protrusion 58 are respectively provided on the inner circumferential surface 55b of the blade support portion 55, and protrude radially inward. The protrusions 57, 58 extend downward from the protruding portion . The first protrusion 57 is disposed at the end of the first side D1 of the blade support part 55 so as to extend in the up-down direction. The first protrusion 57 has a rectangular shape when viewed from the front in the radial direction. A surface 57a facing the inside in the radial direction at the lower end of the first protrusion 57 is gradually inclined so as to move away from the axis O1 as it extends downward. The first protrusion 57 has a trapezoidal shape when viewed from the side in the circumferential direction. The first protrusion 57 is disposed above the swirl vane 56. The first protrusion 57 is spaced upward from the swirl vane 56. Here, the first protrusion 57 being spaced upward from the swirl vane 56 means that not only the upper end of the inclined surface 57a but also the lower end of the surface 57a is spaced upward from the swirl vane 56, i.e., the entire first protrusion 57 is spaced upward from the swirl vane 56.

[0052] The second protrusion 58 is disposed to extend in the up-down direction at the end of the second side D2 on the inner circumferential surface 55b of the blade support part 55. The second protrusion 58 has a trapezoidal shape when viewed from the front in the radial direction, and a rectangular shape when viewed from the side in the circumferential direction. The second protrusion 58 is disposed above the swirl vane 56 and is connected to the swirl vane 56 . The first protrusion 57 and the second protrusion 58 are spaced apart from each other in the circumferential direction. As shown in FIG. 1, the lower end of the first protrusion 57 (the lower end of the surface 57a) is disposed below the upper end of the opening a of the upper body .

[0053] The upper vertical pipe connection portion 53, protrusion portion 54, blade support portion 55, swirl blade 56, first protrusion portion 57, and second protrusion portion 58 of the unit body 52 are integrally constructed from the same material as the upper joint unit 27A.

[0054] There is no limitation on the configuration of the seal member 62. For example, the seal member 62 has a seal body 63, a thick portion 64, and a fin portion 65, as shown in FIG. The seal body 63 is formed in a cylindrical shape. The thickness of the peripheral wall of the seal body 63 is shorter than the length by which the protrusion 54 protrudes radially inward. The seal body 63 is disposed radially inward of the large diameter portion 53a and the small diameter portion 53b of the upper vertical pipe connection portion 53 and coaxially with the axis O1.

[0055] The thick-walled portion 64 is formed in an annular shape and is disposed on the inner circumferential surface of the lower end portion of the seal body 63. A recess 64a recessed upward is formed on the lower surface of the thick-walled portion 64. The recess 64a is formed around the entire periphery of the thick-walled portion 64. The fin portion 65 is fixed to the inner circumferential surface of the upper end portion of the seal body 63. In a natural state in which no external force is acting on the fin portion 65, the fin portion 65 gradually inclines downward as it moves radially inward.

[0056] The seal body 63, thick portion 64, and fin portion 65 of the seal member 62 are integrally formed from synthetic rubber or the like.

[0057] The pressing member 72 has a main body 73 and a cylindrical portion 74 . The main body 73 is formed in an annular shape and is disposed coaxially with the axis O1. The main body 73 is engaged with the large diameter portion 53a of the upper vertical pipe connecting portion 53 and the seal main body 63 of the seal member 62 from above the large diameter portion 53a and the seal main body 63. The cylindrical portion 74 is formed in a cylindrical shape and is fixed to the outer circumferential surface of the main body 73. The cylindrical portion 74 protrudes downward from the main body 73. The cylindrical portion 74 is fitted into the large diameter portion 53a of the upper vertical pipe connecting portion 53 from the radial outside of the large diameter portion 53a.

[0058] A main body 73 and a cylindrical portion 74 of the pressing member 72 are integrally formed from the same material as the upper joint unit 27A. It should be noted that the blade unit 51 does not necessarily have to include the seal member 62 and the pressing member 72.

[0059] 1 and 4, the adhesive part 81 fixes the joint body 26 and the blade support part 55 to each other by adhesion. More specifically, the adhesive part 81 fixes the body side adhesive surface 28b of the joint body 26 and the support part side adhesive surface 55a of the blade support part 55 to each other by adhesion. For the adhesive part 81, a known adhesive for bonding polyvinyl chloride resin or the like can be used.

[0060] 1, the lower end of the first vertical pipe 10 is disposed in the seal member 62, the press member 72, and the upper vertical pipe connection portion 53 of the blade unit 51. The lower end of the first vertical pipe 10 is engaged with the protruding portion 54 of the unit body 52 from above the protruding portion 54 via the thick portion 64 of the seal member 62. At this time, the first vertical pipe 10 elastically deforms the radially inner end of the fin portion 65 of the seal body 63 downward and radially outward. The upper end of the second vertical pipe 15 is disposed within the lower vertical pipe connection portion 45 of the joint body 26 . A second end portion of the horizontal pipe 20 opposite to the first end portion is disposed within a horizontal pipe connecting portion 47 of the collective joint 25 .

[0061] Next, a method for manufacturing the collective joint 25 configured as above will be described, with emphasis on bonding the joint body 26 and the blade support portion 55 together. First, the upper joint unit 27A, the connecting pipe 37, the lower joint body 42, the unit body 52, the seal member 62, and the pressing member 72 are individually molded by injection molding or the like. Adhesive is applied to the support-side adhesive surface 55a of the unit body 52 with a brush or the like, and the unit body 52 is inserted into the upper body 28 of the upper joint unit 27A. For example, the unit body 52 and the upper joint unit 27A are dried at room temperature for a certain period of time, whereby the adhesive becomes the adhesive portion 81. The upper joint unit 27A and the unit body 52 are fixed together by the adhesive portion 81, and then the connecting pipe 37, the lower joint body 42, the sealing member 62, and the pressing member 72 are connected to them using an appropriate adhesive or the like to manufacture the assembly joint 25.

[0062] The adhesive may be applied to the main body side adhesive surface 28b of the upper joint unit 27A, or to both the main body side adhesive surface 28b of the upper joint unit 27A and the support portion side adhesive surface 55a of the unit main body 52.

[0063] As described above, in the collective joint 25 of this embodiment, for example, wastewater that flows into the joint body 26 through the first vertical pipe 10 connected to the joint body 26 hits the swirl vane 56. Therefore, the wastewater can flow downward within the joint body 26 while being swirled around the axis O1 by the swirl vane 56. This wastewater flows through the second vertical pipe 15 and is treated in the wastewater treatment facility. Since the adhesive part 81 fixes the joint body 26 and the blade support part 55 to each other by adhesion, the swirl vanes 56 can be fixed to the joint body 26 via the blade support part 55 arranged on the inner peripheral surface of the joint body 26. The fixing of the swirl vanes 56 to the joint body 26 by the adhesive part 81 is performed at the blade support part 55 which is closer to the swirl vanes 56 than the vertical pipe connection part of Patent Document 1, so that the swirl vanes 56, which mainly generate noise, can be fixed more reliably to the joint body 26, and noise generated by drainage can be reduced.

[0064] The fixing portion is an adhesive portion 81 that fixes the joint body 26 and the blade support portion 55 to each other by adhesion. Therefore, the joint body 26 and the blade support portion 55 can be fixed to each other by the adhesive portion 81 that uses adhesion. The blade unit 51 has an upper vertical pipe connection part 53, and the blade support part 55 is connected to the upper vertical pipe connection part 53. Therefore, by fitting the upper vertical pipe connection part 53 of the blade unit 51 to the inner peripheral surface of the upper end part of the joint body 26, the swirl blade 56 can be disposed at a desired position in the joint body 26 via the blade support part 55.

[0065] The upper vertical pipe connecting portion 53, the protruding portion 54, the blade support portion 55, the swirl blade 56, the first protruding portion 57, and the second protruding portion 58 are integrally configured. Therefore, for example, the upper vertical pipe connecting portion 53, the protruding portion 54, the blade support portion 55, the swirl blade 56, the first protruding portion 57, and the second protruding portion 58 can be integrally configured by injection molding or the like.

[0066] In addition, in a natural state in which no external force acts on the upper body 28 and the blade support part 55, when viewed in the vertical direction, the radius of curvature (outer diameter) of the support part side bonding surface 55a of the blade support part 55 may be larger than the radius of curvature (inner diameter) of the body side bonding surface 28b of the upper body 28. In other words, the blade support part 55 may be press-fitted into the joint body 26. After the blade support part 55 is pressed into the joint body 26 and compressed radially inward, the radius of curvature of the support part side bonding surface 55a of the blade support part 55 becomes equal to the radius of curvature of the body side bonding surface 28b of the upper body 28 when viewed in the vertical direction. In the collective joint of the first modified example, the joint body 26 and the blade support portion 55 are pressed against each other in the radial direction, and the joint body 26 and the blade support portion 55 can be fixed to each other more reliably by the adhesive portion 81.

[0067] 5, a first modified collective joint 25A may be provided with an adhesive part 83 instead of the adhesive part 81 of the present embodiment. In the first modified example, the vertical rib 30 contacts the lower surface of the swirl vane 56 from below the swirl vane 56. The adhesive portion 83 fixes the swirl vane 56 and the longitudinal rib 30 to each other by adhesive. The collective joint 25A of the first modified example configured in this manner can also achieve the same effects as the collective joint 25 of the first modified example of the present embodiment. The adhesive area of ​​the adhesive portion 83 may be increased by, for example, increasing the circumferential length of the vertical rib 30 .

[0068] Second embodiment Next, a second embodiment of the present invention will be described with reference to Figs. 6 to 10. The same components as those in the above embodiment are given the same reference numerals, and their description will be omitted. Only the differences will be described. 6 and 7, the collective joint 85 of this embodiment has fitting portions (fixing portions) 86, 87 and a bonding portion (fixing portion) 88, instead of the adhesive portion 81 and the first protrusion portion 57 of the collective joint 25 of the first embodiment. The fitting portions 86, 87 fix the joint body 26 and the blade support portion 55 to each other by fitting. In this specification, fitting refers to a relationship in which the shaft fits tightly into the hole, or fits loosely so as to slide.

[0069] The fitting portions 86, 87 are provided on the upper body 28 of the joint body 26. The fitting portions 86, 87 fit into the blade support portion 55, thereby fixing the joint body 26 and the blade support portion 55 to each other by the fitting. The fitting portion 86 has a first piece 90 and a second piece 91 . The first piece 90 protrudes radially inward from the upper body 28 of the joint body 26. The first piece 90 is disposed on a first side D1 relative to the blade support portion 55. The second piece 91 protrudes from a radially inner end of the first piece 90 toward the second side D2. The second piece 91 is spaced radially inward from the upper body 28. The second piece 91, together with the upper body 28 of the joint body 26, sandwiches the blade support portion 55 in the radial direction.

[0070] 6, the first piece 90 and the second piece 91 extend in the up-down direction. The up-down position of the upper end of the first piece 90 and the up-down position of the upper end of the second piece 91 coincide with each other. The up-down position of the lower end of the first piece 90 and the up-down position of the lower end of the second piece 91 coincide with each other. The first piece 90 and the second piece 91 are spaced downward from the protruding portion 54. The lower end of the first piece 90 (the lower end of the second piece 91) is disposed below the upper end of the opening 28a of the upper main body 28. The lower end of the first piece 90 is preferably disposed below the axis O2. The lower end of the first piece 90 is preferably disposed above the lower end of the opening 28a of the upper main body 28.

[0071] The fitting portion 87 extends in the up-down direction. The fitting portion 87 extends downward from the protruding portion 54. The fitting portion 87 contacts the blade support portion 55 from the second side D2 of the blade support portion 55. In this example, the lower end of the fitting portion 87 is located below the upper end of the opening 28a of the upper main body 28 and above the axis O2. 7, adhesive portion 88 is disposed between fitting portion 86 and an end portion of first side D1 of blade support portion 55. An adhesive portion may be disposed between fitting portion 87 and an end portion of second side D2 of blade support portion 55.

[0072] Next, a method for manufacturing the assembled joint 85 configured as above will be described, focusing on the fitting and bonding of the joint body 26 and the blade support portion 55. First, adhesive is applied with a brush or the like to the end of the first side D1 of the blade support portion 55 of the unit body 52. ​​The unit body 52 is inserted between the fitting portions 86 and 87 in the upper body 28. The adhesive is dried to form the adhesive portion 88.

[0073] As described above, in the collective joint 85 of this embodiment, the fitting parts 86, 87 fix the joint body 26 and the blade support part 55 to each other by fitting, so that the swirl vane 56 can be fixed to the joint body 26 via the blade support part 55 arranged on the inner peripheral surface of the joint body 26. The fixing of the swirl vane 56 to the joint body 26 by the fitting parts 86, 87 is performed at the blade support part 55, which is closer to the swirl vane 56 than the vertical pipe connection part of Patent Document 1, so that the swirl vane 56, which mainly generates noise, can be more reliably fixed to the joint body 26, and noise generated by drainage can be reduced.

[0074] The fitting portion 86 has a first piece 90 and a second piece 91. For this reason, by fitting the fitting portion 86, which has a relatively simple configuration including the first piece 90 and the second piece 91, into the blade support portion 55, the joint body 26 and the blade support portion 55 can be fixed to each other. It should be noted that the collective joint 85 does not need to have the adhesive portion 88. In the case where the blade support portion 55 can be fixed to the joint body 26 by the fitting portion 86 alone, the collective joint 85 does not need to have the fitting portion 87.

[0075] The configuration of the collective joint 85 of this embodiment can be modified in various ways, as described below. As in the first modified example of the collective joint 85A shown in Figure 8, the lower end of the first piece 90 (the lower end of the second piece 91) may be positioned below the upper end of the opening 28a of the upper body 28 and above the axis O2. With this configuration, the fitting portion 86 is less likely to obstruct the flow of drainage, improving drainage performance.

[0076] As in a collective joint 95 of a second modified example shown in FIG. 9, in each configuration of the collective joint 85 of the second embodiment, a blade unit 96 may be provided instead of the blade unit 51. The blade unit 96 has a blade support portion 55 and a swirl blade 56. The joint body 26 and the blade support portion 55 are fixed to each other by a fitting portion 86 and a fitting portion 87 (not shown). The joint body 26 and the blade support portion 55 may be fixed to each other by an adhesive portion. In the collective joint 95, the upper end of the upper body 28 functions as an upper vertical pipe connection portion.

[0077] Like a third modified collective joint 100 shown in FIG. 10, each configuration of the collective joint 85 of the second embodiment may have a fitting portion 101 and a blade unit 106 instead of the fitting portions 86 and 87, the adhesive portion 88, and the blade unit 51. The fitting portion 101 is configured similarly to the fitting portion 86 , and has a first piece 102 and a second piece 103 . The blade unit 106 includes a blade support portion 107, the swirl blade 56, and a reinforcing rib 108. The blade support portion 107 is formed in a curved flat plate shape, and is formed in an arc shape when viewed in the vertical direction. The upper end portion of the blade support portion 107 extends gradually further upward toward the second side D2. The swirl blades 56 are provided on the inner peripheral surface of the upper end portion of the blade support portion 107. The reinforcing rib 108 extends downward from the swirl vane 56 and is connected to the vane support portion 107 .

[0078] The collective joints 85A, 95, 100 configured as above can also achieve the same effects as the collective joint 85 of the present embodiment. In the collective joint 100 of the third modified example, the reinforcing ribs 108 are less likely to impede drainage. The fitting portion may be provided on both the joint body 26 and the blade support portion 55.

[0079] Third embodiment Next, a third embodiment of the present invention will be described with reference to FIG. 11. The same components as those in the above 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. 11, in each configuration of the collective joint 25 of the first embodiment, the collective joint 120 of the present embodiment has a blade unit 121 instead of the blade unit 51 and the adhesive portion 81. In Fig. 11, the shape of a unit body 122 (described later) in its natural state where no external force acts on it is shown by a two-dot chain line. In this embodiment, since the upper body 28 of the joint body 26 is formed by injection molding, the inner circumferential surface 28c of the upper body 28 is inclined with respect to the axis O1. Specifically, the inner circumferential surface 28c is inclined so as to gradually approach the axis O1 as it extends downward. Here, in a cross section taken along a plane including the axis O1, the angle between the axis O1 and the inner circumferential surface 28c is defined as θ1. For example, the angle θ1 is 1°.

[0080] The blade unit 121 has a unit body 122 instead of the unit body 52 in each configuration of the blade unit 51 . The unit body 122 has an upper vertical pipe connection portion 53, a protruding portion 54, a blade support portion 55, and a swirl blade 56. In this embodiment, since the unit body 122 is formed by injection molding, in a natural state, the outer peripheral surface 55c of the blade support part 55 is inclined with respect to the axis O1. Specifically, the outer peripheral surface 55c is inclined so as to gradually approach the axis O1 as it extends downward. Here, in a cross section taken along a plane including the axis O1, the angle between the axis O1 and the outer circumferential surface 55c is defined as θ2. For example, the angle θ2 is equal to or smaller than 1° and equal to or smaller than the angle θ1.

[0081] For example, when the upper vertical pipe connection part 53 is attached to the joint body 26, the upper body 28 presses against the blade support part 55 radially inward, causing the blade support part 55 to deform as shown by the solid line. The upper body 28 and the blade support part 55 pressing against each other in the radial direction form the fixing part 124. The fixing part 124 fixes the upper body 28 (joint body 26) and the blade support part 55 to each other by a radial interference fit. In this specification, interference fit means a fit that has a portion reserved for tightening.

[0082] As described above, the collective joint 120 of this embodiment can reduce noise generated by drainage. Furthermore, the fixing portion 124 fixes the upper body 28 and the blade support portion 55 to each other by radial interference. Therefore, the fixing portion 124 can fix the upper body 28 and the blade support portion 55 to each other by radial interference.

[0083] The configuration of the mass joint 120 of this embodiment can be modified in various ways, as described below. Like a collective joint 120A of a first modified example shown in FIG. 12, each configuration of the collective joint 25 of the first embodiment may have a blade unit 131 instead of the blade unit 51 and the adhesive portion 81. In the first modified example, a recess 28d recessed radially outward is formed on the inner circumferential surface of the upper body 28 of the joint body 26. The recess 28d is formed in a range in the up-down direction of the upper body 28 that corresponds approximately to the blade support portion 55. The recess 28d is formed only in a portion of the upper body 28 in the circumferential direction. In the first and subsequent modified examples, the inner circumferential surface 28c of the upper main body 28 and the outer circumferential surface 55c of the blade support portion 55 are aligned along the axis O1 (and are not inclined relative to the axis O1).

[0084] The blade unit 131 has a unit body 132 instead of the unit body 52 in each configuration of the blade unit 51 . The unit body 132 has a protrusion 134 in addition to each component of the unit body 122. The protrusion 134 is provided on the outer circumferential surface of the blade support part 55. In this example, the protrusion 134 is provided over substantially the entire length of the blade support part 55 in the up-down direction. The radial length of the protrusion 134 in its natural state is equal to or less than the radial length (depth) of the recess 28d. The vertical length of the protrusion 134 in its natural state is slightly longer than the vertical length of the recess 28d.

[0085] For this reason, when the protrusion 134 is pressed into the recess 28d, the protrusion 134 presses against the upper end of the opening periphery of the recess 28d in the upper main body 28 from below this upper end. The upper end of the opening periphery of the recess 28d in the upper main body 28 and the protrusion 134, which press against each other in the up-down direction (axis O1 direction), form a fixing portion 136. Furthermore, the protrusion 134 presses against the lower end of the opening periphery of the recess 28d in the upper main body 28 from above this lower end. The fixing portion 137 is formed by the protrusion 134 and the lower end of the opening periphery of the recess 28d in the upper main body 28, which press against each other in the up-down direction (axis O1 direction). The fixing parts 136, 137 fix the upper body 28 (joint body 26) and the blade support part 55 to each other by tight fitting in the up-down direction (direction of the axis O1).

[0086] As described above, in the collective joint 120A of the first modified example, the fixing parts 136, 137 fix the upper body 28 and the blade support part 55 to each other by vertical interference fit. This allows the fixing parts 136, 137 to fix the upper body 28 and the blade support part 55 to each other by vertical interference fit. Therefore, it is possible to reduce noise generated by drainage. The unit body 132 can be positioned in the circumferential direction relative to the joint body 26 by the recess 28d and the protrusion 134 formed only partially in the circumferential direction. Alternatively, a recess may be formed on the outer peripheral surface of the blade support portion 55, and a protrusion corresponding to this recess may be formed on the upper body .

[0087] Like a collective joint 120B of a second modified example shown in FIG. 13, in each configuration of the collective joint 25 of the first embodiment, a unit body 52A of a blade unit 51A may be provided instead of the unit body 52 and adhesive portion 81 of the blade unit 51. The unit body 52A (blade unit 51A) has a second blade support portion (reinforcing plate) 139 instead of the first protrusion portion 57 and the second protrusion portion 58 in each configuration of the unit body 52. In this modified example, the swirl vane 56 is disposed at the lower end (the end in the direction of the axis O1) of a predetermined range in the circumferential direction of the vane support portion 55. The second blade support part 139 is formed in a curved flat plate shape, and is formed in an arc shape when viewed in the vertical direction. The second blade support part 139 is disposed on the opposite side (lower side) of the blade support part 55 in the direction of the axis O1, with the swirl blade 56 in between. The swirl blade 56 is disposed at the upper end of the second blade support part 139.

[0088] The lower end of the second blade support portion 139 contacts the upper end of the surface 29a of the locking portion 29 from above this upper end. The upper surface of the locking portion 29 may be formed so as to be aligned with a horizontal surface. Then, the lower end of the second blade support portion 139 may be made to easily come into contact with the upper surface of the locking portion 29.

[0089] In the second modified example, the two vertical ribs 30 provided on the upper body 28 (joint body 26) are arranged to sandwich the blade support part 55 and the second blade support part 139 in the circumferential direction. In the second modified example, the circumferential length of the blade support part 55 and the second blade support part 139 in the natural state is slightly longer than the circumferential length between the two vertical ribs 30. Therefore, when the blade support part 55 and the second blade support part 139 are arranged between the two vertical ribs 30, the blade support part 55 and the second blade support part 139 press against the two vertical ribs 30 from the inside of the two vertical ribs 30. The two vertical ribs 30 and the blade support parts 55, 139 pressing against each other in the circumferential direction form a fixing part 141.

[0090] Here, of the two vertical ribs 30 arranged in the circumferential direction, the vertical rib 30 arranged on the first side D1 is also referred to as vertical rib 30A, and the vertical rib 30 arranged on the second side D2 is also referred to as vertical rib 30B. The blade support portion 55 presses against the vertical rib 30A from the second side D2 of the vertical rib 30A. The second blade support portion 139 presses against the vertical rib 30B from the first side D1 of the vertical rib 30B. The fixing portion 141 fixes the upper body 28 (joint body 26) and the blade support portions 55, 139 to each other via the two vertical ribs 30 by circumferential interference fit.

[0091] As described above, in the collective joint 120B of the second modified example, the fixing portion 141 fixes the upper body 28 and the blade support portions 55, 139 to each other by circumferential interference fit. Therefore, the fixing portion 141 can fix the upper body 28 and the blade support portions 55, 139 to each other by circumferential interference fit. This can reduce noise caused by drainage. Furthermore, the blade support portion 55 and the second blade support portion 139 may together form the blade support portion.

[0092] A collective joint 120C of a third modified example shown in Fig. 14 includes each component of the collective joint 120A of the first modified example, and further includes an adhesive portion 146. Note that the swirl vanes 56 are not shown in Fig. 14. In the third modified example, the recess 28d is not formed in the upper main body 28. The protrusion 134 is formed only on the lower end of the outer circumferential surface of the blade support portion 55.

[0093] The adhesive portion 146 is disposed in a portion above the protrusion 134 on the outer circumferential surface of the blade support portion 55. The adhesive portion 146 fixes the upper body 28 (joint body 26) and the blade support portion 55 to each other by adhesion. Since the overall thickness (radial length) of the blade support portion 55 and the protrusion portion 134 is thicker than the thickness of the blade support portion 55, the protrusion portion 134 presses against the upper body 28 from the radial inside of the upper body 28. The upper body 28 and the protrusion portion 134 pressing against each other in the radial direction constitute a fixing portion 147. The fixing portion 147 fixes the upper body 28 and the blade support portion 55 to each other by radial interference. The third modified example of the collective joint 120C includes an adhesive portion 146 and a fixing portion 147.

[0094] The fourth modified example collective joint 120D shown in Figure 15 has a shorter circumferential length of the blade support portion 55 and the second blade support portion 139 as a whole than the second modified example collective joint 120B, and a notch 139a is formed in the second blade support portion 139. The notch 139a penetrates the second blade support portion 139 in the radial direction and opens downward. The bottom (upper end) of the notch 139a presses against the vertical rib 30B from above the vertical rib 30B, and the two are fixed to each other by a vertical (axis O1) tight fit. The bottom of the notch 139a and the vertical rib 30B form a fixing portion 148. The blade support portion 55 is spaced from the vertical rib 30A to the second side D2.

[0095] As indicated by a two-dot chain line L1 in FIG. 15, the blade support portion 55 may be pressed against the longitudinal rib 30A from the second side D2 of the longitudinal rib 30A. As shown by the two-dot chain line L2, the second blade support part 139 may be cut out from the end of the second side D2 of the bottom of the notch 139a toward the upper side. Even in this configuration, the second blade support part 139 and the vertical rib 30B can form a fixing part.

[0096] (Fourth embodiment) Next, a fourth embodiment of the present invention will be described with reference to Figs. 16 and 17. The same components as those in the above embodiment are given the same reference numerals, and the description thereof will be omitted. Only the differences will be described. As shown in FIG. 16, the unit body 152 of the blade unit 151 provided in the collective joint 150 of this embodiment has an upper vertical pipe connection portion 53, a protrusion portion 54 (not shown), a blade support portion 55, a swirl blade 56, and two reinforcing portions 153, 154. The reinforcing portions 153 and 154 are formed in a curved flat plate shape, and are formed in an arc shape when viewed in the up-down direction.

[0097] Reinforcing portion 153 protrudes from an end of first side D1 (circumferential direction) of blade support portion 55 to first side D1 (in the circumferential direction so as to be separated from blade support portion 55). Reinforcing portion 154 protrudes from an end of second side D2 (circumferential direction) of blade support portion 55 to second side D2 (in the circumferential direction so as to be separated from blade support portion 55). Reinforcing portions 153, 154 are provided on blade support portion 55. In this embodiment, the circumferential lengths of the reinforcing parts 153, 154 gradually increase toward the top. The reinforcing parts 153, 154 are connected to the upper vertical pipe connecting part 53. The reinforcing parts 153, 154 reinforce the blade support part 55.

[0098] As described above, in the collective joint 150 of this embodiment, for example, wastewater that flows into the joint body 26 through the first vertical pipe 10 connected to the joint body 26 hits the swirl vane 56. Therefore, the wastewater can flow downward within the joint body 26 while being swirled around the axis O1 by the swirl vane 56. This wastewater flows through the second vertical pipe 15 and is treated in the wastewater treatment facility. Since the reinforcing portions 153, 154 that reinforce the blade support portion 55 are provided on the blade support portion 55 closer to the swirl blade 56 than the vertical pipe connection portion of Patent Document 1, the vibration of the blade support portion 55 that supports the swirl blade 56, which is the main source of noise, can be further suppressed, and the noise generated by drainage can be reduced.

[0099] The reinforcing portion 153 protrudes from the end of the first side D1 of the blade support portion 55 toward the first side D1, and is connected to the upper vertical pipe connecting portion 53. Therefore, the upper vertical pipe connecting portion 53 can be attached to the joint body 26 together with the blade support portion 55 and the swirl blade 56. The blade support portion 55 can be reinforced by the reinforcing portion 153 so as not to impede the drainage flowing through the joint body 26. The unit body 152 has two reinforcing parts 153, 154. Therefore, the blade support part 55 can be reinforced more efficiently by the two reinforcing parts 153, 154.

[0100] It should be noted that the unit body 152 does not necessarily have to have the reinforcing portion 153 or the reinforcing portion 154 . The reinforcement portion may protrude radially from the blade support portion 55 .

[0101] A unit body 152A of a blade unit 151A included in a collective joint 150A of the first modified example shown in FIG. 17 has a reinforcing portion 161 instead of the reinforcing portion 153 in each component of the unit body 152. The reinforcing portion 161 protrudes toward the first side D1 from the end of the first side D1 of the blade support portion 55. When viewed in the radial direction facing the reinforcing portion 161, the outer edge of the reinforcing portion 161 is formed in an arc shape.

[0102] The collective joint 150A of the first modified example configured as described above can suppress the concentration of stress due to external force, for example, when an external force due to drainage acts on the swirl vane 56, on the reinforcing parts 161 connected to the vane support parts 55 and the upper vertical pipe connection parts 53.

[0103] Fifth embodiment Next, a fifth embodiment of the present invention will be described with reference to Figs. 18 to 26. The same components as those in the above-mentioned embodiment are given the same reference numerals, and the description thereof will be omitted. Only the differences will be described. As shown in Figures 18 to 21, the collective joint 165 of this embodiment has the same configuration as the collective joint 120B of the second modified example of the third embodiment, but instead of the unit body 52A of the blade unit 51A, it has a unit body 167 of the blade unit 166, the adhesive portion 81, and a second adhesive portion (second fixing portion) 175. The unit body 167 has reinforcing ribs (second reinforcing portions) 168A and 168B in addition to the respective components of the unit body 52A. Note that the shape of the second reinforcing portions is not limited to a rib shape.

[0104] The reinforcing ribs 168A and 168B are provided on the inner peripheral surface of the second blade support portion 139 and protrude radially inward from the second blade support portion 139. The reinforcing ribs 168A and 168B extend in the up-down direction. The reinforcing ribs 168A and 168B are arranged at intervals from each other in the circumferential direction, and the reinforcing rib 168A is arranged on the first side D1 relative to the reinforcing rib 168B. The reinforcing rib 168A is formed in a plate shape with the thickness direction of the reinforcing rib 168A (itself) extending along the circumferential direction. The reinforcing rib 168B is formed in a plate shape with the thickness direction of the reinforcing rib 168B extending along the circumferential direction.

[0105] 21, in this embodiment, a surface 168aA of the reinforcing rib 168A facing inward in the radial direction is inclined so as to gradually move away from the axis O1 as it extends downward. The reinforcing ribs 168A, 168B are respectively connected to the swirl vane 56 and the second vane support portion 139. That is, the upper ends of the reinforcing ribs 168A, 168B are continuous with the swirl vane 56.

[0106] At the connection between the protruding portion 54 and the blade support portion 55, a surface 55e facing between the radially inward and downward direction is recessed toward the radially outward and upward direction. A surface 55f is disposed at the end of the first side D1 in the connection between the upper vertical pipe connection part 53 and the blade support part 55, and faces between the first side D1 and the downward direction, and is recessed toward the direction between the second side D2 and the upward direction. The surfaces 55f and 55e are smoothly connected by a three-dimensional curved surface. A surface 55g is disposed at the end of the second side D2 at the connection between the upper vertical pipe connection part 53 and the blade support part 55, and faces downward from the second side D2 and is recessed toward the direction between the first side D1 and upward. The surface 55g and the surface 55e are smoothly connected by a three-dimensional curved surface.

[0107] 18, the adhesive portion 81 fixes the joint body 26 and the blade support portion 55 to each other by adhesion. The second adhesive portion 175 fixes the joint body 26 and the second blade support portion 139 to each other by adhesion. In addition, the blade support portion 55, 139 and the joint body 26 may be fixed to each other by at least one of adhesion, fitting, and interference fit. The reinforcing rib 168B and the vertical rib 30B press against each other in the vertical direction to form a fixing portion 169 (see also FIG. 18).

[0108] As described above, in the collective joint 165 of this embodiment, in addition to the blade support part 55, the second blade support part 139 which is fixed to the joint body 26 by adhesive can more reliably fix the swirl vanes 56, which mainly generate noise, to the joint body 26.

[0109] The unit body 167 has reinforcing ribs 168A and 168B. Therefore, the reinforcing ribs 168A and 168B can more reliably connect the swirl vane 56 and the second vane support portion 139 to each other. The reinforcing rib 168A is formed in a plate shape with the thickness direction of the reinforcing rib 168A aligned along the circumferential direction. Therefore, for example, when the volume of the reinforcing rib 168A is constant, deformation of the swirl blade 56 in the up-down direction relative to the second blade support portion 139 can be efficiently suppressed.

[0110] It should be noted that the collective joint 165 may include, instead of the adhesive portion 81, the fixing portion 124 that fixes the joint body 26 and the blade support portion 55 to each other by radial interference fit. The collective joint 165 may include a second fixing portion that fixes the joint body 26 and the second blade support portion 139 to each other by radial interference fit, instead of the second adhesive portion 175. The second fixing portion may have a structure that fixes the joint body 26 and the second blade support portion 139 to each other by at least one of adhesion, engagement, and interference fit. The unit body 167 does not necessarily have to have the reinforcing rib 168A.

[0111] As shown by line L5 in FIG. 20, the length by which the swirl vanes 56 protrude radially inward may be shortened and the circumferential length of the swirl vanes 56 may be lengthened. In this case, it is preferable to make the circumferential length of the blade support portion 55 longer in correspondence with the swirl blade 56. Furthermore, it is preferable to dispose the lower end of the vertical rib 30 above the swirl blade 56 so that the swirl blade 56 does not come into contact with the vertical rib 30.

[0112] 22 and 23, the connection portion between the inner circumferential surface of the blade support portion 55 and the upper surface of the swirl blade 56 may have a curved surface 55i that is recessed in a direction between the radially outward and downward direction. In each configuration of the collective joint 165, the collective joint 165A does not have the second blade support portion 139 and the reinforcing ribs 168A and 168B. As described above, the unit body 167A may have the curved surface 55i instead of the reinforcing ribs 168A and 168B to suppress vibration of the swirl vanes 56 and the vane supports 55 and 139.

[0113] 24 and 25, the connection portion between the inner circumferential surface of the second blade support portion 139 and the lower surface of the swirl blade 56 may have a curved surface 56c that is recessed in a direction between the radially outward and upward direction. The collective joint 165B does not have the reinforcing ribs 168A, 168B in each configuration of the collective joint 165. As described above, the unit body 167B may have the curved surface 56c instead of the reinforcing ribs 168A, 168B to suppress vibration of the swirl vane 56 and the vane support portions 55, 139.

[0114] As in a collective joint 165C of a third modified example shown in FIG. 26, a surface 168aA facing radially inward in a reinforcing rib 168A may be a curved surface recessed in a direction between the radially outward and upward direction. Similar to the surface 168aA, the surface 168aB of the reinforcing rib 168B facing inward in the radial direction may be a curved surface that is concave in a direction between the outer side and the upper side in the radial direction.

[0115] Although the first to fifth embodiments of the present invention have been described above 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 fifth embodiments, the joint body 26 does not have to have the locking portion 29, the vertical rib 30, and the horizontal rib 31.

[0116] The unit body 52 may not have the upper vertical pipe connection portion 53, the protruding portion 54, and the protruding portions 57 and 58. The blade unit 51 may not have the sealing member 62 and the pressing member 72. Although the joint body 26 is described as being composed of three components: the upper joint body 27, the connecting pipe 37, and the lower joint body 42, the joint body may be composed of one component, or two, or four or more components.

[0117] For example, the joint body 26 may be composed of two members, the upper joint body 27 and the lower joint body 42, without providing the connecting pipe 37. In this case, the lower end of the upper joint body 27 is a socket or a spigot, and the upper end of the lower joint body 42 is a spigot or a spigot, so that the lower end of the upper joint body 27 and the upper end of the lower joint body 42 can be directly connected to each other. In this case, a sheet-like fireproof material containing a thermal expansion material such as thermally expandable graphite may be provided at a position below the horizontal pipe connection part 47 of the upper joint body 27 or on the outer surface of the lower body 43 or the connection part 44 of the lower joint body 42. The width of the joint body 26 made of the sheet-like fireproof material in the pipe axial direction is set to 100 mm or more, preferably 140 mm or more, and most preferably 160 mm or more. The fixing portion may be configured to fix the joint body 26 and the blade support portion 55 to each other by at least one of adhesion, fitting, and interference fit.

[0118] In order to suppress drainage noise generated when wastewater hits the swirl vanes 56 provided on the upper body 28 and vibration of the upper body 28 and the swirl vanes 56, it is preferable to provide the upper body 28 and the swirl vanes 56 with vibration-damping material (not shown). Examples of the vibration-damping material include rubber such as butyl rubber and elastomers, and the material may be molded into a sheet shape so as to be wrapped around the outer circumferential surface of the upper body 28, or may be in the form of a putty. The vibration-damping material may be provided on the outer peripheral surface of the upper body 28, the underside of the swirl vane 56, the support portion-side adhesive surface 55a and the inner peripheral surface 55b of the vane support portion 55, and the like. [Explanation of symbols]

[0119] 25, 25A, 85, 85A, 95, 100, 120, 120A, 120B, 120C, 120D, 150, 150A, 165, 165A, 165B, 165C joints 26 Fitting body 51, 51A, 96, 106, 121, 131, 151, 151A Blade unit 53 Upper vertical pipe connection part (vertical pipe connection part, main body connection part) 55,107 Blade support 56 Swirling blades 81,83,88 Adhesive part (fixed part) 86, 87, 101 Fitting part (fixed part) 90,102 1st piece 91,103 2nd piece 124,136,137,141,148,169 Fixed part 139 Second blade support part 153,154,161 Reinforcement 168A, 168B Reinforcement rib (second reinforcement part) 175 2nd adhesive part (2nd fixed part) O1 axis

Claims

1. A joint body arranged so that its axis is along the vertical direction; a blade unit including a blade support portion disposed on an inner peripheral surface of the joint body and a swirl blade protruding radially inward from the blade support portion; a fixing portion that fixes the joint body and the blade support portion to each other by at least one of adhesion, fitting, and interference fitting; A collective joint comprising:

2. The assembly joint according to claim 1 , wherein the fixing portion is an adhesive portion that fixes the joint body and the blade support portion to each other by the adhesive.

3. The assembly joint according to claim 2 , wherein the vane support portion is press-fitted into the joint body.

4. The collective joint according to claim 1 , wherein the fixing portion is a fitting portion that is provided on the joint body and fits into the blade support portion to fix the joint body and the blade support portion to each other by the fitting.

5. The fitting portion is a first piece protruding from the joint body toward the radially inner side and disposed on a first side in a circumferential direction relative to the blade support portion; a second piece that protrudes from an end portion of the first piece on the radially inner side toward a second side in the circumferential direction and that sandwiches the blade support portion together with the joint body in the radial direction; The assembly joint of claim 4 , having

6. The blade unit has a vertical pipe connection portion fitted to an inner circumferential surface of an upper end portion of the joint body, The joint assembly according to claim 1 , wherein the blade support portion is connected to the vertical pipe connection portion.

7. The assembly joint of claim 1 , wherein the vane support and the swirl vane are integrally constructed.

8. The assembly joint according to claim 1 , wherein the fixing portion fixes the joint body and the blade support portion to each other by the interference fit in the radial direction.

9. The assembly joint according to claim 1 , wherein the fixing portion fixes the joint body and the blade support portion to each other by the interference fit in the axial direction.

10. The swirl vane is disposed at an end of the vane support portion in the axial direction, The blade unit has a second blade support portion disposed on the opposite side of the blade support portion in the axial direction with the swirl blade therebetween, The assembly joint according to claim 1 , further comprising a second fixing portion that fixes the joint body and the second vane support portion to each other by at least one of an adhesive, an engagement, and an interference fit.

11. The assembly joint of claim 10 , further comprising a second reinforcement portion connected to the swirl vane and the second vane support portion, respectively.

12. The collective joint according to claim 11 , wherein the second reinforcing portion is formed in a plate shape with a thickness direction along the circumferential direction.

13. A joint body arranged so that its axis is along the vertical direction; a blade unit including a blade support portion disposed on an inner peripheral surface of the joint body and a swirl blade protruding radially inward from the blade support portion; a reinforcing portion provided on the blade support portion and reinforcing the blade support portion; A collective joint comprising:

14. the blade unit has a body connection portion that is connected to an end of the blade support portion and is attachable to the joint body, The collective joint according to claim 13 , wherein the reinforcing portion protrudes in the circumferential direction from a circumferential end of the blade support portion so as to be spaced away from the blade support portion, and is connected to the main body connection portion.

15. The reinforcing portion includes two reinforcing portions, The collective joint according to claim 14 , wherein the two reinforcing portions each protrude in the circumferential direction from an end of the blade support portion in the circumferential direction.

16. The collective joint according to claim 14 , wherein an outer edge of the reinforcing portion is formed in an arc shape when viewed in the radial direction so as to face the reinforcing portion.

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