JP2010248735A - Adapter for joint, and drainage structure using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an adapter for a joint which can easily attach a tubular body of a joint body incapable of being used as a branch joint for connecting a horizontal branch pipe and a standpipe for a conventional multistory building to each other to an LT joint-type pipe joint almost identical in diameter to the standpipe, and can easily constitute a single pipe-type drainage system with excellent drainage performance by means of the LT joint-type pipe joint even in a high-rise building with ten or more stories by attachment to the LT joint-type pipe joint, and to provide a drainage structure using the adapter for the joint. <P>SOLUTION: In the drainage structure A, a tubular fitting portion 21 of the adapter 1a is fitted into the upper socket 52 of the pipe joint 5; a swing blade supporting leg 23 which is elongated below the fitting portion 21, and a swing blade 22, which is supported by the swing blade supporting leg 23 and provided in the standpipe 6a in such a manner as to be inclined with respect to a pipe axis are attached in positions to face a joint body-side opening of a horizontal branch pipe connecting portion 5b in the tubular body 51 of the pipe joint 5 from a horizontal direction, a lower end of the upside standpipe 6a is connected to the adapter 1a, and a lower socket 53 of the pipe joint 5 is connected thereto. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a joint adapter and a drainage structure using the joint adapter.

  Conventionally, a two-pipe drainage system (see, for example, Patent Document 1) is used as a multi-story building drainage system. In the case of a two-pipe drainage system, the vent pipe is drained separately from the drainage vertical line. Since it is arranged in parallel with the vertical pipe line, there is a problem that a lot of piping space must be taken, and a vent pipe that is not directly related to drainage must be provided separately. There is a problem that a great deal of cost is required.

Therefore, the trunk portion having a diameter larger than the connected standpipe and having a lateral branch pipe connecting portion projecting on the side surface, and a reduced diameter portion gradually reducing the diameter downward from the trunk portion to the trunk portion. In addition, a joint joint has already been proposed in which a swirl vane is provided on the inner wall surface of the reduced diameter portion (see, for example, Patent Documents 2 and 3).
That is, since this collective joint is provided with swirl vanes, the swirl vanes receive the drainage that flows into the trunk from the upper floor via the vertical pipe and the drainage that flows into the trunk via the side branch pipe connection. As a swirl flow, an air core can always be generated in the drainage conduit.

  Therefore, if this collective joint is used, even in a single-pipe drainage system that does not provide a ventilation channel, it prevents the sealing of sealing water such as sanitary equipment connected to the side branch pipe due to a pressure change due to the blockage of the drainage conduit. As a result, the piping space can be reduced as compared with the above two-pipe drainage system, and the workability is improved.

However, in the case of a single-pipe drainage system using the above-mentioned collective joint, the piping space can be reduced compared to a two-pipe drainage system. There is a problem in terms of piping space because the piping space of the drainage conduit must be made larger than the diameter.
Further, since the swivel vanes are below the horizontal branch pipes in the collective joint, the drainage flowing from the horizontal branch pipes directly hits the swirl vanes, and the swirl flow of the drainage flowing through the vertical pipes may be hindered and jumping may occur. In addition, there is a problem that the joint cost is high and the weight is heavy and the workability is poor.

On the other hand, it is inexpensive and requires only a small installation space. Using the LT joint of DV joints (hard polyvinyl chloride pipe joints for drainage) specified in JISK6739 as a confluence joint, piping for the drainage vertical pipe section In order to minimize the space required and to support the construction of a single-pipe drainage system, a short pipe with a projection with a diameter almost the same as the vertical pipe diameter is provided at the upper part of the side branch pipe opening of the vertical pipe. Provided on the inner surface of the short pipe portion with a protrusion having a protruding portion that is 10 to 30% of the tube diameter, substantially perpendicular to the vertical axis of the vertical tube, and substantially horizontal and straight to the vertical section of the vertical tube. A drainage expansion / contraction joint with a projection having a pipe diameter substantially the same as the diameter of the vertical pipe is provided at the upper part of the side branch pipe opening of the vertical pipe, and the projection is 10-30% of the joint pipe diameter. Almost perpendicular to the tube axis, almost horizontal and straight to the vertical section There has been proposed a drainage pipe device (see Patent Document 4) in which a single pipe portion with a protrusion having a protruding portion is provided.
That is, according to the drainage pipe device, when the drainage flowing down from the upper part is a large amount and at a high speed, the part other than the projection part falls as it is, but it flows down along the pipe wall of the vertical pipe and projects. The drainage that collides with the flow part flows down the inclined surface of the protruding part, leaves the inclined surface from the middle and collides with the facing wall surface, reduces the speed of the flowing water other than the protruding part, and the flowing speed of the whole flowing water In addition, since the opening of the horizontal branch pipe is prevented from being closed by the falling water film from the upper part of the vertical pipe, the pressure fluctuation in the horizontal branch pipe can be greatly suppressed.

  However, in the case of the above-mentioned drainage piping apparatus, the effect may be expected to some extent for a multi-storey building with 10 floors or less, but in the drainage system for high-rise buildings such as recent high-rise apartments with 10 floors or more Cannot be used.

JP 2001-3419 A JP 2005-282330 A Japanese Patent No. 3567427 Japanese Patent No. 4174794

  In the present invention, in view of the above circumstances, the cylindrical body portion of a joint body that has not been used as a branch joint for connecting a multi-story stand pipe and a side branch pipe has an LT having substantially the same diameter as the stand pipe. Can be easily attached to a joint-type pipe joint, and a single-pipe drainage system with excellent drainage performance can be easily constructed by using an LT joint-type pipe joint even in a 10-story or higher-rise building. An object of the present invention is to provide a fitting adapter and a drainage structure using the fitting adapter.

  In order to achieve the above object, a joint adapter according to the present invention includes a tubular body having an inner diameter substantially the same as that of a connected standpipe, and a joint body including an upper receiving port at an upper end of the tubular body. The pipe body is connected to the upper receiving port of the pipe joint provided with the side branch pipe connecting portion having a bent portion curved downward on the side wall surface side. A ring-shaped or cylindrical fitting part, and a position of the vertical pipe at a position facing the joint body side opening of the side branch pipe connecting part from the horizontal direction in a state where the fitting part is fitted to the upper receiving port. A swirl vane provided to be inclined with respect to the tube axis, and a swirl vane support leg extending from the fitting portion and supporting the swirl vane and having a swirl vane support surface formed in an arcuate cross section. It is characterized by that.

In the adapter for a joint according to the present invention, the swirl vane is sized so that the horizontal projected area of the swirl vane is 5% to 30% with respect to the internal cross-sectional area of the vertical pipe when viewed in the tube axis direction when mounted on the pipe joint. It is preferable.
That is, if the horizontal projection area of the swirl vane is less than 5% with respect to the internal cross-sectional area of the vertical pipe, there is a possibility that the drainage flowing down from above by the swirl vane cannot be sufficiently swirled, exceeding 30%. There is a risk that the standing pipe will be clogged with solid matter falling in the waste water.

In addition, the swirl vane preferably has an inclination angle of the swirl vane of 20 ° to 50 ° with respect to the tube axis when mounted on the pipe joint.
That is, if the inclination angle of the swirl blade is less than 20 °, the drainage water cannot be received sufficiently, and sufficient deceleration force and swirl force cannot be obtained. As a result, sufficient drainage capacity may not be obtained. Exceeding °, when the drainage water hits the swirling blade, the rebound to the center of the pipe increases, making it difficult to secure the ventilation core in the drainage pipe, and as a result, sufficient drainage performance may not be obtained. is there.

Further, the swirl vane is attached to the pipe joint, and its upper end is from the bottom of the side branch pipe connected to the side branch pipe connection part of the pipe joint (hereinafter referred to as “the side branch pipe bottom”). It is preferable that it is located in the upper part.
The lower end of the swirl vane may be above the bottom of the horizontal branch pipe, but is preferably below the bottom of the horizontal branch pipe.
The shape of the swirl vane is not particularly limited, and for example, a shape in which the drainage receiving surface is provided with a linear string connecting both ends of the arc.

In addition, the joint adapter of the present invention may be provided with a flange so that it can be connected to the cylindrical riser connecting portion or the standpipe having a larger diameter than the standpipe connected above the fitting portion.
And when a cylindrical standing pipe connection part is provided as mentioned above, the rubber ring packing which is fitted in the cylindrical standing pipe connection part, and the connected standing pipe is watertightly fitted, and the cylindrical standing pipe A cylindrical part that is externally fitted to the connection part and a state where the upper end edge of the rubber ring packing is not detached from the cylindrical vertical pipe connection part when the cylindrical part is externally fitted to the cylindrical vertical pipe connection part. It is good also as a structure provided with the cap member which has a ring-shaped collar part to stop.

In the adapter for a joint according to the present invention, the fitting portion supports at least the lower end portion of the inner wall surface of the swirl blade for the purpose of preventing drainage of the drainage in the vertical direction of the vertical pipe and preventing backflow to the side branch pipe side. The diameter may be gradually reduced toward the part.
The angle of diameter reduction is preferably 10 ° or less with respect to the tube axis, and the inner diameter of the minimum diameter portion must be greater than or equal to the size allowing the test ball to pass.

  In the joint adapter according to the present invention, it is preferable that the swirl vane support leg portion be as small as possible so as not to obstruct the drainage flowing from the side branch pipe as long as the swirl vane can be supported.

Although the material of the adapter for joints of this invention is not specifically limited, A synthetic resin is preferable.
Although it does not specifically limit as a synthetic resin which forms the adapter for joints, Hard vinyl chloride resin is suitable, and fillers, such as a calcium carbonate and graphite, may be mix | blended in order to improve fire resistance and intensity | strength.

A drainage structure according to the present invention has a tubular body having an inner diameter substantially the same as a connected standpipe, and has a joint body provided with an upper receiving port at the upper end of the tubular body, and the tubular body of the joint body. A pipe joint provided with a side branch pipe connecting part having a curved part curved downward on the side wall face side, the fitting adapter of the present invention, and the cross-section arc-shaped leg part in the joint body It is characterized in that it is installed in the drainage conduit in a state where it is mounted so as to face.
As the pipe joint used in the drainage structure of the present invention, an LT joint (large curve Y) defined by JISK6739 may be used, or an LT type molded specially may be used.

  A drainage pipe joint with swirl vanes according to the present invention has a cylindrical body portion having an inner diameter substantially the same as a connected standpipe, a joint body having an upper receiving port at the upper end of the tubular body part, The joint adapter according to the present invention is integrated and integrated with an existing pipe joint provided with a side pipe connection portion having a bent portion that is continuously provided on the side wall surface of the cylindrical body portion and curved downward on the side wall surface side. It is characterized by.

  An adapter for a joint according to the present invention has a tubular body having an inner diameter substantially the same as a connected standpipe, and has a joint body provided with an upper socket at the upper end of the tubular body, and the tubular body of the joint body A ring-like or tubular fitting fitted to the upper receiving port of a pipe joint provided with a side branch pipe connecting part provided continuously with the side wall surface of the body portion and curved downward on the side wall surface side In a state where the joint portion and the fitting portion are fitted to the upper receiving port, the vertical pipe is inclined with respect to the pipe axis at a position facing the joint body side opening of the side branch pipe connecting portion from the horizontal direction. Since the swirl vane provided and the swirl vane support leg portion that extends from the fitting portion, supports the swirl vane, and has a swirl vane support surface formed in a circular arc shape, the drainage capacity is low, and the conventional Use as a branch joint to connect a vertical pipe and a horizontal branch pipe of a high-rise building such as a high-rise apartment. The cylindrical body of the joint body which could not be easily attached to the branch connection of LT fitting type productivity can be well manufactured inexpensively compared to conventional aggregate joint is substantially the same diameter as the standing pipe.

By installing, the falling water flowing into the joint body through the vertical pipe is swirled by the swirl vanes and flows down along the pipe wall of the vertical pipe connected to the lower side, and the air core is stably placed in the vertical pipe. The drainage structure of the present invention having a high drainage capacity can be formed. That is, if this drainage structure is used, it can be set as the single pipe | tube type drainage system excellent in the drainage performance which can be used for a high-rise building. That is, it is possible to make the piping space of the drainage vertical conduit the minimum size which is substantially close to the diameter of the vertical pipe and to construct it at a low cost.
In addition, the swirl vane is disposed at a position facing the joint main body side opening of the side branch pipe connection portion from the horizontal direction, and the side branch pipe connection portion has a bent portion that curves downward on the side wall surface side. The problem that the waste water flowing from the pipe into the joint body hits the swirl blade and jumps up is also eliminated.

  Moreover, since the swivel vane and swirl vane support leg are installed in a state where the swivel vane and the swivel vane support leg enter the tubular body of the joint main body, the entire adapter can be used even when transporting and installing the pipe fitting. The length of the pipe body of the pipe joint in the pipe axis direction can be reduced in size, and the workability can be improved.

It is sectional drawing showing 1st Embodiment of the adapter for couplings concerning this invention. It is sectional drawing of the decomposition | disassembly state of the adapter of FIG. It is a front view of the main-body member of the adapter of FIG. It is a right view of the adapter of FIG. It is a left view of the adapter of FIG. It is a rear view of the adapter of FIG. FIG. 3 is a plan view of the adapter of FIG. 2. It is a bottom view of the adapter of FIG. It is a bottom view of the cap member of the adapter of FIG. 1 is a front view showing an example of a pipe joint to which the adapter of the present invention is attached. It is sectional drawing seen from the front direction of the pipe joint of FIG. It is a right view of the pipe joint of FIG. It is a top view of the pipe joint of FIG. It is sectional drawing which looked at the state which mounted | wore the pipe joint with the adapter of FIG. 1 from the front. It is a right view of the state which mounted | wore the pipe joint with the adapter of FIG. It is a schematic diagram explaining the position of the swirl | wing blade of the state which mounted | wore the pipe joint with the adapter of FIG. It is principal part sectional drawing showing 1st Embodiment of the drainage structure concerning this invention using the adapter of FIG. 1A shows a first embodiment of a joint adapter according to the present invention, FIG. 1A is a rear view thereof, FIG. 1C is a left side view thereof, FIG. 3D is a front view thereof, and FIG. ) Is a right side view. It is sectional drawing of the drainage pipe joint with a turning blade obtained by integrating the adapter of FIG. 18 with the existing pipe joint. It is principal part sectional drawing showing 2nd Embodiment of the drainage structure concerning this invention using the drainage pipe joint with a turning blade | wing of FIG. It is a schematic explanatory drawing of the experimental drainage vertical line used in the Example.

Hereinafter, the present invention will be described in detail with reference to the drawings showing embodiments thereof.
FIG. 1 shows a first embodiment of a joint adapter according to the present invention.

As shown in FIG. 1, the joint adapter (hereinafter referred to as “adapter” only) 1 a includes a main body member 2, a rubber ring packing 3, and a cap member 4.
As shown in FIGS. 1 to 8, the main body member 2 is formed by injection molding a hard vinyl chloride resin composition, and includes a fitting portion 21, a swirl blade 22, and a swirl blade support leg 23. And a cylindrical standpipe connection part 24.

  The fitting portion 21 has a cylindrical shape that is fitted into an upper receiving port 52 of the pipe joint 5 to be described later, and as shown in FIGS. 1 and 3, In addition to being substantially coincident, the inner diameter gradually decreases from the upper end toward the lower end, resulting in a tapered shape. The diameter reduction angle is 7.5 degrees with respect to the central axis of the fitting portion 21, and the inner diameter of the lower end, that is, the minimum diameter is 58 mm or more, which is a size that allows the test ball to pass.

The swirl vane 22 has a projected area of 5% to 30% of the inner cross-sectional area of the vertical pipe 6a as viewed in the tube axis direction when mounted on the pipe joint 5, and an inclination angle of 20 °. It is supported by the swirl blade support leg 23 so as to be ˜50 °.
Further, the swirl vane 22 is disposed at a position facing the joint main body side opening of the side branch pipe connecting portion 5b from the horizontal direction in a state where the swirl vane 22 is attached to the pipe joint 5 to be described later. The upper end of the swirl vane 22 is located below the cylindrical trunk side edge of the horizontal branch pipe connection part 5 b of the pipe joint 5. It is supported by the swirl vane support leg 23 so as to be located above the tube bottom.

The swirl vane support leg 23 has a width substantially the same as the width of the swirl vane 22 and extends substantially from the lower end of the fitting portion 21, and the lower end edge is inclined so as to follow the inclination of the swirl vane 22.
The swirl vane support surface is formed in a circular arc shape and supports the swirl vane 22 slightly above the lower end edge.

The cylindrical standpipe connection portion 24 is provided above the fitting portion 21, and a rubber ring packing 3 to be described later is fitted therein, and a ring for preventing the cap member 4 to be described later from being detached on an outer peripheral surface of the upper end portion. A shaped ridge 24a is provided.
The rubber ring packing 3 is made of a rubber material normally used for drainage facilities such as ethylene-propylene-diene rubber (EPDM), and has a lip portion 31 that is water-tightly attached to the outer peripheral surface of the vertical pipe 6a at the upper end portion. The upper end of the cylindrical standing tube connecting portion 24 is substantially coincident with the upper end of the cylindrical standing tube connecting portion 24 or slightly protrudes from the upper end of the cylindrical standing tube connecting portion 24.
The lip portion 31 is provided so as to gradually become smaller in diameter toward the lower end side, the upper end side is substantially the same as or slightly larger than the outer diameter of the riser 6a, and the lower end side is the outer diameter of the riser 6a. It has a stepped portion with a smaller diameter, and the tube end portion of the vertical pipe 6a hits to absorb thermal expansion and contraction of the vertical pipe 6a.

The cap member 4 is made of the same hard vinyl chloride resin as that of the main body member 2 and includes a cylindrical portion 41 and a ring-shaped flange portion 42 as shown in FIGS.
The cylindrical portion 41 is adapted to be fitted on the upper end portion of the cylindrical vertical pipe connecting portion 24, and radially forms three locking ridges 43 having an arc shape projecting inwardly at the lower end portion of the inner wall surface. I have.

  The ring-shaped flange portion 42 is provided so as to project in a ring shape from the upper end of the cylindrical portion 41, and the inner diameter thereof is substantially the same as or slightly smaller than the outer diameter of the vertical tube 6 a and smaller than the outer diameter of the rubber ring packing 3. It has become.

In the adapter 1 a, first, the rubber ring packing 3 is fitted into the cylindrical standing tube connecting portion 24, and then the cylindrical portion 41 of the cap member 4 is connected to the cylindrical standing tube connecting portion 24. Until the upper end surface is received, it is integrated by being fitted to the cylindrical vertical pipe connecting portion 24.
That is, when the cylindrical portion 41 of the cap member 4 is fitted onto the cylindrical vertical pipe connecting portion 24, the locking protrusion 43 gets over the separation preventing protrusion 24 a of the cylindrical vertical pipe connecting portion 24, and the cap member 4. Is attached to the main body member 2 in a state of preventing detachment, and the rubber ring packing 3 is locked to the ring-shaped flange portion 42 in a state of preventing detachment.

The adapter 1a is attached to a pipe joint 5 as shown in FIGS.
That is, the pipe joint 5 is formed by injection molding a hard vinyl chloride resin composition containing non-expanded graphite as a filler, and includes a joint main body 5a and a side branch pipe connecting portion 5b.

The joint body 5 a has a cylindrical body 51 having an inner diameter substantially the same as that of the vertical pipe 6 a to be connected. An upper receiving port 52 is connected to the upper end of the cylindrical body 51, and the lower end of the cylindrical body 51 is connected. A lower receiving port 53 is continuously provided at the bottom.
The wall thickness of the cylindrical body 51 is 7.5 mm, which is 1.5 times the wall thickness 5 mm of a normal DV joint (LT type), and is connected to a stand pipe 6a (for example, 100A). The inner diameter of the VP tube is substantially the same.

The side branch pipe connecting portion 5b is provided continuously with the side wall surface of the cylindrical body 51, has a bent portion 54 that curves downward on the side wall surface side, and a side receiving port 55 on the side branch pipe side of the bent portion 54. I have.
The bent portion 54 has the same wall thickness as that of the cylindrical body portion 51 and is shorter than a normal DV joint (LT type).
As shown in FIGS. 11 to 13, the horizontal receiving port 55 has a notch 55 a for alignment of a bush for a lateral branch pipe (hereinafter referred to as “bush”), which will be described later, formed in the upper part of the opening edge. Yes.

As shown in FIG. 14, the adapter 1 a is integrated with the pipe joint 5 by fitting the fitting portion 21 into the upper receiving port 52 and bonding the fitting portion 21 with an adhesive. Further, the swirl vane 22 and the swirl vane support leg 23 enter the cylindrical body 51 in a state of being integrated with the pipe joint 5, and as shown in FIG. 15, the swirl vane 22 is connected to the side branch pipe connecting portion 5a. It arrange | positions in the position which faces the joint main body side opening 54a from a horizontal direction.
Further, at this time, as shown in FIG. 16, the swirl vane 22 has a projected area of 5% to 30% with respect to the internal cross-sectional area of the vertical pipe 6a as viewed in the tube axis direction of the vertical pipe 6a. In this embodiment, an angle θ formed by a perpendicular line L1 from the center O of the vertical cross section to the chord of the projection shape of the swirl vane 22 and a line segment L2 parallel to the central axis of the horizontal branch pipe 5 is a line segment L2. The swirl vanes 22 are arranged so as to be 45 ° counterclockwise.

The position of the swirl vane 22 is set to the above position if the drainage flowing from the horizontal branch pipe does not directly hit the swirl vane 22 and the swirl vane support leg 23 does not prevent the inflow of drainage from the side branch pipe. Although it is not limited, when the swirl vane 22 has a shape with a linear string connecting both ends of the arc as described above, when the swirl vane 22 is projected from above the vertical pipe 6a, the angle θ is It is preferable to arrange the swirl vanes 22 so as to fall within the range of 45 ° counterclockwise from the line segment L2 and 180 ° counterclockwise as indicated by a chain line in FIG.
Further, the above bonding may be performed before shipment at a factory, or may be performed at a construction site.

FIG. 17 shows one embodiment of the drainage structure in the present invention using the adapter 1a shown in FIG.
As shown in FIG. 17, the drainage structure A has the lower receiving port 53 facing the inside of the through hole 71 of the slab 7 of the pipe joint 5 fitted with the adapter 1a, and the standing pipe 6a ( In this embodiment, Sekisui Chemical Co., Ltd. is a fireproof pipe such as ESLON fireproof VP pipe, which is a three-layered PVC pipe with hard polyvinyl chloride layers on the inner and outer surfaces, and expands greatly at high temperatures to form a heat insulating and fireproof layer. A pipe formed of an intermediate layer containing a special composition containing thermally expandable graphite, which is disclosed in Japanese Patent Laid-Open No. 2008-180367. The drainage vertical pipe is constructed by repeatedly fitting the lower end of the vertical pipe 6a (same Sekisui Chemical Co., Ltd. ESLON fireproof VP pipe or other fireproof pipe) to the watertight joint.
Moreover, when the construction of the pipe joint 5 is completed as described above, the through hole 71 is filled with the mortar 72 and sealed.

  On the other hand, the bush 9a for the 50A side branch pipe, the 65A side branch pipe, or the 75A side branch pipe, for example, according to the side branch pipe 8 connected to the side receiving port 55 of the pipe joint 5 (in FIG. 17). Only the bush for the 65A side branch pipe is shown) is selected and connected.

The bush 9a includes a receptacle fitting portion 91 and a cap fitting portion 92 having a diameter larger than that of the receptacle fitting portion 91, and a side branch pipe connection hole 93 is formed therein.
The receptacle fitting portion 91 has one protrusion 91a that is slidably fitted into the notch 55a on the outer peripheral surface thereof at the end on the cap fitting portion 92 side.

The side branch pipe connection holes 93 are formed in a diameter corresponding to the diameter of the side branch pipe 8 to be connected, and the rubber ring packing 9b made of the same material as the rubber ring packing 3 corresponding to the diameter of the side branch pipe 8. However, the end edge on the side branch pipe 8 side is substantially fitted with the end edge of the cap fitting portion 21 or is fitted so that it protrudes slightly outward.
Further, with respect to the bushes 9a for the 50A side branch pipe and the 65A side branch pipe, a side branch pipe connection hole 93 is provided with its center axis eccentric from the center axis of the bush 9a to the opposite side of the projection 91a.

In the cap fitting portion 92, a detachment preventing protrusion 92a of a cap member 9c, which will be described later, is provided on the outer peripheral surface on the side branch pipe side over the entire periphery in the same manner as the detachment prevention protrusion 24a of the cylindrical vertical pipe connecting portion 24. Yes.
The cap member 9 c includes a cylinder portion 94 and a lid portion 95.
The cylindrical portion 94 is externally fitted to the cap fitting portion 92, and is provided with locking protrusions 94 a radially at the lower end portion of the inner wall surface in the same manner as the cylindrical portion 41 of the cap member 4. Yes.

The lid portion 95 includes a side branch pipe insertion hole 95a having a diameter substantially the same as or slightly larger than the outer diameter of the side branch pipe 8 to be connected.
Further, in the case of the cap member 9c used for the bushing 9a for the 50A side branch pipe and the 65A side branch pipe, the side branch pipe insertion hole 95a is eccentric from the central axis of the cylindrical portion 94, like the side branch pipe connection hole 93. Is provided.

The bush 9a is fixedly bonded to the horizontal receiving port 55 via an adhesive while the receiving port fitting portion 91 is fitted to the horizontal receiving port 55.
After the rubber ring packing 9b is fitted in the lateral branch pipe connection hole 93 of the bush 9a, the cap member 9c is engaged with the cylinder portion 94 so that the locking projection 94a gets over the separation prevention projection 92a and the separation prevention projection 92a. The lid 95 is fixed to the bush 9a in a state in which the rubber ring packing 9b is locked in a state of being prevented from coming off.
It should be noted that the adhesive fixing of the bush 9a to the lateral receiving port 55 may be performed before shipment at the factory, or may be performed at the piping construction site, or to the bush 9a of the rubber ring packing 9b and the cap member 9c. It may be performed at any timing before or after mounting.

The pipe joint 5 is constructed as described above, and the rubber ring packing 9b and the cap member 9c are integrated with the horizontal receiving port 55 via the bush 9a. One end thereof is inserted into the rubber ring packing 9b through the insertion hole 95a and connected to the pipe joint 5 in a watertight manner.
Moreover, although not shown in figure, the other end of the horizontal branch pipe 8 is connected to apparatuses, such as a toilet, a bathtub, a kitchen, and a washroom.

According to the drainage structure A thus obtained, the swirl vane 22 is provided in the joint body 5a of the pipe joint 5, so that the drainage flowing down from the upstanding pipe 6a is received by the swirl vane 22. It turns into a swirling flow and flows down along the pipe wall of the lower vertical pipe 6a.
Accordingly, even in a high-rise building such as a high-rise apartment, an air core is always formed in the drainage conduit P, and the drainage conduit P having a high drainage capacity can be obtained.
Moreover, since the fitting part 21 of the adapter 1a has a cylindrical shape that gradually decreases in diameter from the upper end to the lower end, the drainage that has entered the fitting part 21 does not spread outward, and the backflow to the side branch pipe side Can be prevented.

  Further, the swirl vane 22 is disposed at a position facing the joint main body side opening of the side branch pipe connecting portion 5b from the horizontal direction, and the side branch pipe connecting portion 5b has a bent portion 54 that curves downward on the side wall surface side. Therefore, the problem that the waste water flowing into the joint main body 5a from the side branch pipe 8 hits the swirl blade 22 and jumps up is eliminated.

Further, since the wall thickness of the pipe joint 5 is 7.5 mm, which is 1.5 times that of the conventional DV joint (LT type), the sound insulation effect is obtained by 18 × Logm (m: surface density). When a wall thickness ratio of 1.5 times is introduced into the Logm equation, the sound attenuation is 18 × Log1.5 = 3 dB, and a reduction of 3 dB can be expected. Therefore, it is not necessary to separately provide a sound insulation cover, and workability can be improved.
In the adapter 1a of the present invention, the fitting portion 21 is fitted into the upper receiving port 52 of the pipe joint 5, and the swirl vane 22 and the swirl vane support leg 23 are inserted into the joint body 5a. Even when the adapter 1a is bonded and integrated in advance, the adapter 1a can be miniaturized and has excellent workability.

FIG. 18 shows a second embodiment of the adapter of the present invention.
As shown in FIG. 18, the adapter 1 b has a ring shape in which the fitting portion 25 has the same inner diameter as the inner diameter of the standing tube 6 a, and includes a cylindrical standing tube connecting portion 24 above the fitting portion 25. Except for this, it is the same as the adapter 1a.
That is, in this adapter 1b, as shown in FIG. 19, the fitting portion 21 is fitted and bonded in the upper receiving port 52 of the existing DV joint 50a in which the lateral receiving port 55 has a smaller diameter than the upper receiving port 52. The swirl vane 22 and the swirl vane support leg 23 are mounted so as to enter the cylindrical body 51, and the drain pipe joint 50 b having the swirl vane 22 is obtained.

  In the drainage structure B using the drainage pipe joint 50b, as shown in FIG. 20, the upper and lower ends of the vertical pipe 6a are fitted and bonded to the upper receiving port 52 or the lower receiving port 53, and the horizontal receiving port 55 is connected. The drainage structure A is the same as the drainage structure A except that one end of the side branch pipe 8 having a smaller diameter than the vertical pipe 6a is fitted and bonded.

The present invention is not limited to the above embodiment. For example, in the above-described embodiment, the pipe joint is provided with the receiving ports on the upper and lower sides of the joint body, but the lower end may have an opening shape.
In the above embodiment, a pipe joint having a wall thickness 1.5 times that of the conventional DV joint (LT type) is used, but the conventional DV joint (LT type) and the adapter of the present invention are used. You may make it combine.
In addition, the horizontal branch pipe 8 may be a fireproof pipe such as Sekisui Chemical Co., Ltd. Eslon fireproof VP pipe, similar to the vertical pipe 6.

  Examples of the present invention will be described in detail below.

(Examples 1 to 13)
As shown in FIG. 21, a fireproof pipe such as 100A Sekisui Chemical Co., Ltd. Eslon fireproof VP pipe as the vertical pipe 6a, a 150A vinyl chloride resin pipe as the horizontal main pipe 6b, the horizontal main pipe 6b and the lowermost stand 6a Using the 100A / 150A special leg joint 6c and the pipe joint 5 fitted with the adapter 1a having the projected area and inclination angle of the swirl blade 22 shown in Table 1 Line P was formed.
Then, when drainage is caused to flow down at 2.5 L / S from the portion corresponding to the 17th floor of the experimental drainage pipe P, the drainage is allowed to flow down at 2.0 L / S from the portion corresponding to the 16th floor. The maximum generated negative pressure in the pipe body 5a of the pipe joint 5 corresponding to the floor is measured based on the drainage capacity test method (SHASE-218), and each 1L / S drainage is introduced from the top floor. The presence or absence of clogs was examined, and the results are also shown in Table 1.

(Comparative Example 1)
Except for using the swirl vane and the adapter not equipped with the swirl vane support leg, a drainage vertical line is formed in the same manner as in the above example, and the maximum negative pressure generated in the pipe and the presence or absence of impurities are checked. The results are also shown in Table 1.

(Comparative Example 2)
As a pipe joint, instead of the pipe joint 5 of the first embodiment, a conventional DV joint (DT type) is used, and the projected area ratio (projected area / cross-sectional area of the vertical pipe) of the swirl blade shown in Table 1 is inclined. Except that the adapter 1a having an angle is mounted, a drainage conduit is formed in the same manner as in the embodiment, and the maximum negative pressure generated in the pipe and the presence or absence of impurities are checked. The results are also shown in Table 1. It was.

  From Table 1 above, it can be seen that if the adapter of the present invention is attached to a DV joint (LT type), the drainage performance is significantly improved as compared with the case of only the DV joint (LT type). Moreover, in the case of a DV joint (DT type), it turns out that drainage performance does not improve so much even if it uses the adapter of this invention.

A, B Drainage structure 1a, 1b Adapter 2 Main body members 21, 25 Fitting portion 22 Swirling blade 23 Swirling blade support leg 24 Tubular vertical tube connection portion 3 Rubber ring packing 31 Lip portion 4 Cap member 41 Tube portion 42 Ring shape Fence part 5 Pipe joint 5a Joint body 5b Side branch pipe connection part 51 Cylindrical trunk part 52 Upper receiving port 53 Lower receiving port 54 Bending part 54a Joint body side opening 55 Horizontal receiving port 50a Existing pipe joint 50b Drain pipe with swirl blade Joint 6a Vertical pipe

Claims (9)

A joint body having a cylindrical body portion having substantially the same inner diameter as a standing pipe to be connected, and having an upper receiving port at the upper end of the tubular body portion, and provided on a side wall surface of the tubular body portion of the joint body. , A pipe joint comprising a side branch pipe connection part having a bent part that curves downward on the side wall surface side,
A ring-shaped or cylindrical fitting portion to be fitted to the upper receptacle;
A swirl vane provided at a position facing the joint main body side opening of the side branch pipe connecting portion from the horizontal direction in a state where the fitting portion is fitted to the upper receiving port and inclined with respect to the tube axis of the vertical pipe When,
A swirl vane support leg that extends from the fitting portion, supports the swirl vane and has a swirl vane support surface formed in a cross-section arc shape;
An adapter for joints, comprising:   The joint adapter according to claim 1, wherein the horizontal projected area of the swirl vane with respect to the inner cross-sectional area of the vertical pipe in a state where the pipe joint is mounted is 5% to 30%.   The joint adapter according to claim 1 or 2, wherein an inclination angle of the swirl vane with respect to the tube axis is 20 ° to 50 ° in a state of being attached to the pipe joint.   The adapter for joints in any one of Claims 1-3 which has a cylindrical vertical pipe connection part larger diameter than the vertical pipe connected above a fitting part. A rubber ring packing that is fitted into the cylindrical vertical pipe connecting portion, and the vertical pipe to be connected is fitted in a watertight manner,
The cylindrical part that is externally integrated with the cylindrical vertical pipe connection part, and the upper end edge of the rubber ring packing is detached from the cylindrical vertical pipe connection part in a state where the cylindrical part is externally fitted to the cylindrical vertical pipe connection part. The coupling adapter according to claim 4, further comprising: a cap member having a ring-shaped flange portion that is locked so as not to engage.   The joint adapter according to any one of claims 1 to 5, wherein at least a lower end portion of the inner wall surface of the fitting portion is gradually reduced in diameter toward the swirl blade support portion.   The adapter for joints in any one of Claims 1-6 which consists of synthetic resins.   A joint body having a cylindrical body portion having substantially the same inner diameter as a standing pipe to be connected, and having an upper receiving port at the upper end of the tubular body portion, and provided on a side wall surface of the tubular body portion of the joint body. A pipe joint comprising a side branch pipe connection part having a bent part that curves downward on the side wall surface side is the joint adapter according to any one of claims 1 to 7, wherein the cross-section arc-shaped leg part is a joint. A drainage structure characterized in that the drainage structure is incorporated in a drainage conduit in a state of being mounted so as to face the body.   A joint body having a cylindrical body portion having substantially the same inner diameter as a standing pipe to be connected, and having an upper receiving port at the upper end of the tubular body portion, and provided on a side wall surface of the tubular body portion of the joint body. The joint adapter according to any one of claims 1 to 7 is integrally mounted on an existing pipe joint including a side branch pipe connecting part having a bent part that curves downward on the side wall surface side. A drainage pipe joint with swirling blades.

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