JP2020033702A - Collective joint - Google Patents

Abstract

To provide a collective joint which can combine prevention of squirt of drainage from a vertical pipe to a horizontal pipe due to a drift plate with prevention of the squirt of the drainage from the horizontal pipe to another horizontal pipe, and furthermore allows for reduction of overhang of the joint to a horizontal pipe direction thereby allowing for reduction of clogging of the horizontal pipe with the drainage.SOLUTION: The collective joint comprises: a swirling vanes 4 that extends along the inner circumferential surface 11a of an upper connection pipe 11 and is arranged in an inclined condition with respect to the pipe axis direction; and at least one vertical rib 2 which extends in the pipe axis direction, is disposed between the openings 14a of a horizontal pipe connection 14 around the pipe center O of the inner circumferential surface 11a of the upper connection pipe 11. The vertical rib 2 includes an inclined vertical rib 2A that is arranged between the opening 14a of the horizontal pipe connecting portion 14A positioned near the downstream end 4a of the swirling blade 4 and the swirling blade 4. The inclined vertical rib 2A gradually inclines toward the swirling blade 4 side from the base end portion 2a toward the protruding end 2b with respect to a straight line Q connecting the base end portion 2a of the inclined vertical rib 2A and the center O of the tube in plan view as viewed from the tube axis direction.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a collective joint.

Conventionally, as a plumbing pipe for water supply and drainage used in an apartment house or the like, a resin collective joint for connecting a vertical pipe penetrating vertically through each story and a horizontal pipe extending inside each story is provided. I have.
In such a collective joint, a plurality of horizontal pipe connection portions are provided on the side of the pipe main body so as to correspond to the horizontal pipe. Furthermore, in the case of discharging the strong drainage flow, the drainage flowing into the pipe main body from the horizontal pipe via the horizontal pipe connection portion faces the opening of the horizontal pipe connection portion in the pipe main body. In some cases, the reflected flow collides with the inner peripheral surface and the reflected flow flows over the inner peripheral surface into the other lateral pipe connection portion while flowing back, so that the reflected flow may flow back into the other lateral pipe.

  Therefore, as a collective joint provided with vertical ribs for preventing drainage from a horizontal pipe from jumping out toward another horizontal pipe, for example, as shown in Patent Literature 1, in a joint of a plurality of horizontal pipes, At least one vertical rib is provided on a surface (closed surface) opposed to the vertical rib, and the vertical rib extends in the pipe axis direction and projects toward the pipe center. .

  Patent Document 2 discloses a collective joint in which a drift plate is provided between vertical ribs. By providing the drift plate in this way, it is possible to effectively apply a brake to drainage flowing down from the vertical pipe in the vertical direction, and to enhance drainage.

JP 2011-085015 A JP 2006-37371 A

  In the conventional collective joint as described above, by disposing vertical ribs on the downstream side of the drift plate as in Patent Document 2 described above, vertical drainage by the drift plate is prevented from jumping out to the horizontal pipe. The drainage flowing into the collective joint from the horizontal pipe is prevented from jumping out to another horizontal pipe. In order to achieve both of these effects at the same time and achieve a good balance, a vertical rib projecting in the pipe axis direction or in the vertical direction with respect to the vertical drainage direction flowing from the drift plate is effective. However, in such a method, the vertical ribs protrude toward the opening side of the connecting portion of the horizontal pipe, the flow path on the horizontal pipe side becomes narrow, and there is a possibility that miscellaneous substances are easily clogged, so there is room for improvement in that respect. there were.

  In view of the above, the present invention has been made in view of the above-mentioned problems, and it is intended to prevent the drainage from the vertical pipe from jumping out to the horizontal pipe by the drift plate and to prevent the drainage from the horizontal pipe from jumping out to another horizontal pipe. It is an object of the present invention to provide a collective joint that is compatible with each other and that can reduce the amount of protrusion in the horizontal pipe direction and suppress clogging of drainage from the horizontal pipe.

  In order to achieve the above object, a collective joint according to the present invention has a vertical pipe connecting portion capable of connecting a vertical pipe, and a pipe main body formed with a horizontal pipe connecting portion capable of connecting each of a plurality of horizontal pipes, A drift plate that extends along the inner peripheral surface of the pipe body and is arranged to be inclined with respect to the pipe axis direction; A vertical rib provided at least one between openings of the pipe connection portion and extending in the pipe axis direction, wherein the horizontal pipe connection is located near a downstream end of the drift plate as the vertical rib. The opening of the portion, the inclined vertical ribs disposed between the drift plate, the inclined vertical ribs, the base end of the inclined vertical ribs in a plan view seen from the pipe axis direction and the pipe body of the With respect to a straight line connecting the center of the pipe, gradually inclining toward the drift plate side from the base end toward the protruding end. It is characterized in Rukoto.

In the present invention, since the vertical ribs are provided between the openings of the horizontal pipe connection portions, it is possible to prevent the drainage flowing into the pipe main body from the horizontal pipe from jumping out to another horizontal pipe connection portion side. In addition, it is possible to suppress the drainage from flowing into another horizontal pipe. Moreover, in the present invention, since the drainage flow of the drain water flowing down from the vertical pipe and hitting the drift plate rebounds toward the drift plate side by the inclined vertical ribs, the opening of the horizontal pipe connection portion located near the downstream end of the drift plate is provided. The occurrence of backflow from the pipe to the horizontal pipe can be suppressed, and drainage can be improved.
Further, by inclining the inclined vertical ribs toward the drift plate side, it is possible to secure a large opening area of the opening of the horizontal pipe connecting portion located near the downstream end of the drift plate. Therefore, the turbulence of the drain flow flowing into the pipe main body from the opening can be reduced. In this way, the amount of the inclined vertical ribs protruding in the horizontal pipe direction can be reduced to reduce the clogging of drainage from the horizontal pipe.

  Further, in the collective joint according to the present invention, it is preferable that the inclined vertical ribs are inclined toward the drift plate side at an inclination angle of 15 ° to 45 ° with respect to the straight line.

  With such a configuration, it is possible to effectively prevent the drainage from the vertical pipe from jumping out to the horizontal pipe by the drift plate and to prevent the drainage from the horizontal pipe from jumping out to another horizontal pipe. . That is, when the inclination angle of the inclined vertical ribs is larger than 45 ° and is inclined toward the deflector plate, the drainage flow by the deflector plates is not sufficiently blocked by the inclined vertical ribs and flows backward to the horizontal pipe (from other horizontal pipes). (The inflow of the inflowed wastewater into the horizontal pipe) may occur. Further, when the inclination angle is smaller than 15 °, the rebound of the received water becomes large, which may disturb the flow, and the pressure fluctuation in the pipe may be large. By setting the angle in the range of 15 ° to 45 ° as described above, such a problem can be suppressed, and drainage can be improved.

  Further, in the collective joint according to the present invention, the projecting length of the vertical rib is a plan view viewed from the pipe axis direction, and the vertical rib is longer than an inner peripheral surface of the vertical pipe connected to the vertical pipe connection portion. It may be characterized in that it is set so as not to protrude inward.

  In this case, the drainage flowing down from the vertical pipe does not hit the vertical rib, and only the drainage flow hitting the drift plate can flow toward the inclined vertical rib. In addition, since the inclined vertical ribs are arranged at an inclination angle, the projecting dimension of the ribs can be increased, and effective drainage is possible.

  ADVANTAGE OF THE INVENTION According to the collective joint of this invention, the prevention of the discharge of the drainage from the vertical pipe to the horizontal pipe by the drift plate, and the prevention of the drainage of the drainage from the horizontal pipe to the other horizontal pipe can be achieved at the same time. The amount of overhang can be reduced to prevent clogging of drainage from the horizontal pipe.

It is a front view showing the schematic structure of the joint part provided with the collective joint by an embodiment of the present invention. FIG. 2 is an exploded perspective view of the collective joint shown in FIG. 1. FIG. 4 is a vertical cross-sectional view of a state in which a swirling blade is provided in an upper connection pipe. FIG. 4 is an exploded view of an upper connecting pipe and a vertical bush shown in FIG. 3. It is the top view which looked at the upper connection pipe and the revolving blade from the upper part of the pipe axial direction. FIG. 3 is a cross-sectional view taken along line AA shown in FIG. 2, showing a configuration of a vertical rib in an upper connection pipe.

  Hereinafter, a collective joint according to an embodiment of the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 1, the collective joint 10 according to the present embodiment is used for, for example, building drainage, and is provided in a joint portion 1 arranged in a through hole 31 formed in a floor slab 3.

  The collective joint 10 includes an upper connection pipe 11 (pipe main body) and a lower connection pipe 12 connected to the upper connection pipe 11 via an intermediate pipe 15 (see FIG. 2). The upper connecting pipe 11 has a vertical pipe connecting part 13 connectable to the vertical pipe P1, and a horizontal pipe connecting part 14 protruding from the outer peripheral side surface 13a of the vertical pipe connecting part 13 and connecting the horizontal pipe P2. are doing. A vertical pipe P1 is connected to an upper end of the upper connection pipe 11.

  Here, in the following description, the side of the vertical connecting portion 13 along the pipe axis direction X of the upper connecting pipe 11 is referred to as an upper side, and the lower connecting pipe 12 side is referred to as a lower side. Further, a direction orthogonal to the tube center O in a plan view as viewed from the tube axis direction X is referred to as a radial direction, and a direction orbiting around the tube center O in a plan view as viewed from the axial direction is referred to as a circumferential direction.

  On an outer peripheral side surface 13a of the vertical pipe connection portion 13, a plurality of projection portions 130 projecting outward in the radial direction are provided at a plurality of locations (four locations) at regular intervals in the circumferential direction. Specifically, four sets of protrusions 130 are arranged at intervals of 90 degrees in the circumferential direction. Each protruding portion 130 is provided in a state where three ribs extending in the circumferential direction are arranged at equal intervals in the tube axis direction X.

  Each rib of the protrusion 130 extends in the circumferential direction at the same length, and the extension dimension can be set arbitrarily. As will be described later, the projections 130 are places that are supported in a state where a ring-shaped support bracket (not shown) for fixing the collective joint 10 to the floor slab 3 is sandwiched. Are set to have the same circumference. The protrusion 130 is intermittently arranged over the entire circumference in the circumferential direction.

As shown in FIG. 2, the horizontal pipe connecting portion 14 extends radially outward from the peripheral wall of the vertical pipe connecting portion 13. In the example of this embodiment, three horizontal pipe connection parts 14 are arranged.
Two of the three horizontal pipe connection portions 14 are separately arranged at positions sandwiching the pipe center O in the radial direction. The remaining horizontal pipe connecting portions 14 extend in the radial direction at 90 ° in a top view and the direction in which the two horizontal pipe connecting portions 14 extend. In addition, the quantity and the extending direction of the horizontal pipe connection part 14 are not limited to such an aspect, and can be arbitrarily changed. The horizontal pipes P2 are individually connected to the radially outer ends of the horizontal pipe connection portions 14.

  The upper connection pipe 11 injects, for example, a polyvinyl chloride resin composition containing 0.1 to 1.0 parts by weight of non-expandable graphite with respect to 100 parts by weight of the polyvinyl chloride resin into the cavity. Obtained by filling.

As shown in FIGS. 3 and 4, the collective joint 10 is provided with a vertical bush 41 at an upper end of an upper connection pipe 11 to which the vertical pipe P1 is connected via a vertical packing (not shown). An end processing member 60 (see FIG. 1) is provided at the upper end of 41.
The vertical packing is a packing made of a rubber material such as ethylene-propylene-diene rubber (EPDM) which is usually used for drainage equipment, and whose upper end is in close contact with the outer peripheral surface of the vertical pipe P1 in a watertight manner.

  The vertical bush 41 includes a fitting portion 41a, and the swirling blade 4 (a drift plate) attached via a support leg portion 42 extending downward from the fitting portion 41a. The fitting portion 41 a has a smaller diameter than the upper end portion of the vertical bush 41 and has a cylindrical shape to be fitted into the vertical pipe connection portion 13 of the upper connection pipe 11. At the upper end of the outer peripheral surface of the vertical bush 41, an engagement projection 41c formed by undercut molding and extending at a predetermined length along the circumferential direction is provided.

  As shown in FIG. 1, the swirl vanes 4 are provided for efficiently draining the drainage from the vertical pipe P1 to the upper connecting pipe 11, the lower connecting pipe 12, and further to the vertical pipe P1 connected thereunder. I have. The swirling blade 4 extends along the inner peripheral surface 11a of the upper connection pipe 11 in a state where the vertical bush 41 is fitted to the upper connection pipe 11, as shown in FIGS. It is inclined with respect to the tube axis direction X.

  As shown in FIG. 1, the end processing member 60 is fitted to the upper part of the vertical bush 41 shown in FIG. 3 by engaging with the engaging projection 41 c, and the vertical pipe P <b> 1 can be inserted inside. It is a ring-shaped member in which a through hole is formed.

After the vertical bush 41, the vertical packing, and the end processing member 60 are assembled and integrated in advance, the fitting part 41a of the vertical bush 41 is fitted and bonded to the vertical pipe connection part 13 of the upper connection pipe 11. Can be.
Each of the vertical bush 41 and the end treatment member 60 is a polyvinyl chloride resin containing 0.1 to 1.0 parts by weight of non-expandable graphite with respect to 100 parts by weight of the polyvinyl chloride resin. It is obtained by injection molding of a resin composition.

  As shown in FIG. 6, at least one upper connecting pipe 11 is provided between the openings 14 a of the three horizontal pipe connecting portions 14 in the circumferential direction on the inner peripheral surface 11 a, and is provided in the pipe axial direction. A plurality (four in this case) of vertical ribs 2 extending in X are provided. Specifically, one vertical rib 2 is provided between the horizontal pipe connecting portions 14, 14 in which the pipe axis directions of the horizontal pipes P 2 are orthogonal to each other in a plan view, and are disposed at positions facing each other across the pipe center O. Two vertical ribs 2 including inclined vertical ribs 2A to be described later are disposed between the horizontal pipe connecting portions 14 and 14 to be formed.

Each of the vertical ribs 2 has a base end 2 a connected to the opening 14 a of the horizontal pipe connecting portion 14.
Therefore, the four vertical ribs 2 are arranged so as to divide the inner peripheral surface 11a of the upper connection pipe 11 into approximately four equal parts in plan view.
The vertical rib 2 is such that after the drainage flow of the drainage that has flowed vigorously into the upper connection pipe 11 from the horizontal pipe P2 collides with the inner peripheral surface 11a facing the inside of the upper connection pipe 11, the reflected flow thereof is applied to the vertical rib 2. It is configured to hit.

  As the vertical rib 2, an inclined vertical rib 2 </ b> A is arranged at a position between the opening 14 a of the horizontal pipe connecting portion 14 </ b> A located near the downstream end 4 a of the turning blade 4 and the turning blade 4. The inclined vertical rib 2A extends from the base end 2a toward the protruding end 2b with respect to a straight line Q connecting the base end 2a of the inclined vertical rib 2A and the center O of the tube in plan view as viewed in the pipe axis direction X. Gradually, it is inclined at an inclination angle θ of 15 ° to 45 ° toward the swirling blade 4 side (the side away from the opening 14a of the horizontal pipe connecting portion 14A in the circumferential direction).

The projection length of the vertical ribs 2 including the inclined vertical ribs 2 </ b> A is an inner peripheral surface Pa of the vertical pipe P <b> 1 in which the vertical ribs 2 are connected to the vertical pipe connection portion 13 in plan view as viewed in the pipe axis direction X (FIG. 6 (a two-dot chain line shown in FIG. 6). Here, the position of the through hole 41d of the vertical bush 41 shown in FIG. 3 matches the inner peripheral surface Pa of the vertical pipe P1 shown in FIG.
The length of the inclined vertical rib 2A along the pipe axis direction X (height direction) is set to be larger than the inner diameter of the opening 14a of the horizontal pipe connecting portion 14A.

  When the inclination angle θ of the inclined vertical rib 2A is inclined to the side of the swirling blade 4 larger than 45 °, the swirling flow swirled by the swirling blade 4 is not sufficiently blocked by the inclined vertical rib 2A, and the horizontal pipe P2 Backflow may occur. If the inclination angle θ is smaller than 15 °, the rebound of the received water becomes large, which may disturb the flow of water in the upper connection pipe 11, and the pressure fluctuation in the pipe becomes large. There is a risk that it will.

  In addition, all of the vertical ribs 2B other than the inclined vertical ribs 2A protrude from the inner peripheral surface 11a of the upper connection pipe 11 in the pipe center O direction (the pipe does not have to be accurate).

  As shown in FIG. 1, an intermediate pipe 15 having lower swirling blades 19 is connected to the inside of the lower end of the upper connection pipe 11. The outer diameter of the intermediate pipe 15 is smaller than the outer diameter of the vertical pipe connection 13 in the upper connection pipe 11. The peripheral wall of the intermediate pipe 15 is fitted inside the lower end of the vertical pipe connection portion 13.

The intermediate tube 15 is preferably made of a polyvinyl chloride resin, and preferably contains a resin composition containing a polyvinyl chloride resin and thermally expandable graphite. That is, the intermediate tube 15 is produced by molding a resin composition. Usually, the intermediate tube 15 is produced by extruding a resin composition.
The intermediate tube 15 may have a single-layer structure in which the entirety of the intermediate tube 15 is made of a resin composition, or a multi-layer structure in which a plurality of layers are formed. In the case of a multi-layer structure, any layer may be formed from a resin composition. For example, when the intermediate tube 15 has a three-layer structure including a surface layer, an intermediate layer, and an inner layer, an intermediate layer formed of a resin composition may be used, and the surface layer, the intermediate layer, and the inner layer may include a heat absorbing agent. It may be contained.
When the intermediate tube 15 does not contain the heat-expandable graphite, a sheet-like refractory material containing the heat-expandable graphite is wrapped around the outer surface of the intermediate tube 15 or the outer surface of the sound insulating material that covers the intermediate tube 15, and The material may be embedded in the slab penetration.

When the intermediate layer contains the heat-expandable graphite, the intermediate layer takes on a black color. Therefore, it is preferable that the surface layer and the inner layer contain a coloring agent other than black so as to be distinguishable from the intermediate layer.
The thicknesses of the surface layer and the inner layer are each preferably 0.3 mm or more and 3.0 mm or less, and more preferably 0.6 mm or more and 1.5 mm or less. When the thickness of the coating layer is 0.3 mm or more, sufficient mechanical strength as a tube can be ensured, and when it is 3.0 mm or less, a decrease in fire resistance can be suppressed.
Further, it is preferable that the intermediate tube 15 satisfies the performance described in JIS K6741.

  The lower connecting pipe 12 has a tubular shape whose diameter is smaller at the lower side than at the upper side. The lower connection pipe 12 is located at the upper end, and is connected to the connection pipe 16 below the intermediate pipe 15 described above, and is connected below the connection pipe 16 and gradually decreases in diameter as going downward. It has an inclined tube portion 17 and a lower tube portion 18 connected to the lower end portion of the inclined tube portion 17 and connected to the vertical tube P1. The connection pipe section 16, the inclined pipe section 17, and the lower pipe section 18 are integrally formed by, for example, injection molding of a synthetic resin material.

  The inner diameter of the connection pipe part 16 is larger than the outer diameter of the intermediate pipe 15. The peripheral wall of the intermediate pipe 15 is fitted inside the connection pipe part 16. The outer diameter of the inclined pipe 17 at the upper end is smaller than the outer diameter of the connecting pipe 16. The outer diameter of the lower end of the inclined tube 17 is smaller than the outer diameter of the upper end of the inclined tube 17. The size of the inclined pipe part 17 in the pipe center O direction is larger than the size of the connection pipe part 16 in the pipe center O direction.

  The outer diameter of the lower pipe part 18 is smaller than the outer diameter of the connection pipe part 16 and larger than the outer diameter of the lower end part of the inclined pipe part 17. The inner diameter of the lower pipe part 18 is smaller than the inner diameter of the connection pipe part 16. The vertical pipe P <b> 1 is connected to the lower connection pipe 12 by fitting the vertical pipe P <b> 1 into the lower pipe part 18 from below.

  Note that the upper connection pipe 11 and the lower connection pipe 12 may be made transparent. Thereby, the connection state of the upper connection pipe 11, the intermediate pipe, and the lower connection pipe 12 can be visually recognized from the outside. Further, a flame retardant such as non-thermally expanded graphite or magnesium hydroxide may be blended in the upper connection pipe 11 and the lower connection pipe 12.

  As shown in FIG. 1, the lower portion of the collective joint 10 is inserted into a through hole 31 formed in the floor slab 3 of the building structure.

At least a portion of the collective joint 10 buried in the floor slab 3 is a thermal expansion tube. In the illustrated example, the connection pipe section 16 of the lower connection pipe 12 is a thermal expansion pipe.
The thermal expansion tube expands and expands in diameter by being heated, for example, when a fire occurs below the floor of the floor slab 3. In this way, the flame or heat generated by the fire is shut off without transmitting to the floor above the floor slab 3.

Here, transmission of vibration from the piping structure to the floor slab 3 will be described.
When the drainage flows down inside the collective joint 10, the collective joint 10 vibrates because the drainage collides with the inner surface of the collective joint 10. This vibration may be transmitted from the outer peripheral surface of the collective joint 10 to the floor slab 3 via the inner peripheral surface of the through hole 31.

  Here, generally, the vibration transmitted from the through hole 31 of the floor slab 3 to the inner peripheral surface is remarkably transmitted on the upper surface 3a and the lower surface 3b of the floor slab 3. This is because the vibration energy is biased toward the surface, so that the attenuation is small and the amplitude is large.

  As described above, in the present embodiment, the collective joint 10 is inserted into the through hole 31 formed in the floor slab 3, and the lower part of the collective joint 10 is embedded in the floor slab 3. The collective joint 10 is disposed between the upper surface 3a and the lower surface 3b of the floor slab 3.

  In addition, since the portion of the collective joint 10 buried in the floor slab 3 is a thermal expansion tube, if the temperature rises due to a fire or the like downstairs of the floor slab 3, the thermal expansion tube may expand. Therefore, it is possible to prevent heat from being transmitted from the lower floor to the upper floor of the floor slab 3.

Next, a method for constructing the above-described joint 1 will be described with reference to the drawings.
First, as shown in FIG. 1, the collective joint 10 of the joint part 1 is used at the junction of the horizontal branch pipes on each floor of the drainage standing pipe of a multi-story building, and is constructed as follows.
That is, the part including the fitting connection part of the intermediate pipe 15 and the upper connection pipe 11 is installed in a state facing the through hole 31 of the floor slab 3, and the vertical pipe P1 on the lower floor (for example, a commercially available product). Eslon (registered trademark) refractory VP pipe manufactured by Sekisui Chemical Co., Ltd. can be used) and fitted to the lower pipe portion 18 of the lower connection pipe 12 and bonded. Further, the lower end of the vertical pipe P1 on the upper floor is fitted to a vertical packing (not shown) via the vertical bush 41 and the end processing member 60.
Next, the mortar is filled into the through hole 31 of the floor slab 3, and a portion including the fitting connection portion between the intermediate pipe 15 and the upper connection pipe 11 is buried in the mortar.
Subsequently, the end of the horizontal pipe P2 is inserted into the horizontal pipe connection portion 14 to connect the horizontal pipe P2.

Further, a vertical packing is arranged inside the vertical bush 41, and the end processing member 60 is engaged with the engaging projection 41 c of the vertical bush 41 and mounted. At this time, on the inner peripheral surface 11a of the upper connecting pipe 11, as shown in FIGS. 3 and 5, four vertical ribs 2 including the inclined vertical ribs 2A and the revolving blades 4 provided on the vertical bush 41 are provided. It is installed in a state where it is arranged at the above-mentioned predetermined position.
Furthermore, the vertical pipe P1 is inserted into the upper part of the vertical pipe connection part 13 and connected. The vertical pipe P <b> 1 is inserted through the through hole of the end processing member 60, and is held in a liquid-tight manner by a cylindrical vertical packing engaged with the inside of the vertical bush 41.
The joint part 1 using the collective joint 10 is constructed by such a construction procedure.

Next, the operation of the collective joint having the above-described configuration will be described in detail with reference to the drawings.
In the present embodiment, as shown in FIGS. 3, 5, and 6, the vertical ribs 2 are provided between the openings 14a of the horizontal pipe connecting portion 14, so that the horizontal pipe P2 is Can be prevented from flowing out to the opening 14a side of the other horizontal pipe connection portion 14, and the drainage can be suppressed from flowing into another horizontal pipe P2.
Moreover, in the present embodiment, the drain flow of the drain water W flowing down from the vertical pipe P1 and hitting the swirl blade 4 rebounds to the swirl blade 4 side by the inclined vertical rib 2A (see the drainage shown in FIGS. 3, 5 and 6). The direction of the arrow W indicates a drainage flow), and it is possible to suppress the generation of a backflow from the opening 14a of the horizontal pipe connecting portion 14 located near the downstream end 4a of the swirling blade 4 to the horizontal pipe P2. In addition, drainage can be improved.

  In the present embodiment, a large opening area of the opening 14a of the horizontal pipe connecting portion 14 located near the downstream end 4a of the swirl blade 4 is ensured by tilting the inclined vertical rib 2A toward the swirl blade 4 side. Can be. Therefore, the turbulence of the drain flow flowing into the upper connection pipe 11 from the opening 14a can be suppressed to a small level. As described above, in the present embodiment, the amount of drainage from the horizontal pipe P2 can be reduced by reducing the amount of protrusion of the inclined vertical rib 2A in the horizontal pipe direction.

Further, in the present embodiment, since the inclined vertical rib 2A is inclined toward the swirling blade 4 at an inclination angle θ of 15 ° to 45 °, the drainage from the vertical pipe P1 by the swirling blade 4 jumps out to the horizontal pipe P2. It is possible to effectively achieve both the prevention and the prevention of the drainage of the horizontal pipe P2 from jumping out to another horizontal pipe P2.
That is, when the inclination angle θ of the inclined vertical rib 2A is inclined to the side of the swirling blade 4 larger than 45 °, the drainage flow by the swirling blade 4 is not sufficiently blocked by the inclined vertical rib 2A, and the drainage flow to the horizontal pipe P2 (Drainage flowing from another horizontal pipe into the horizontal pipe) may occur. Further, when the inclination angle is smaller than 15 °, the rebound of the received water becomes large, and the flow may be disturbed, and the pressure fluctuation in the pipe may be large. By setting the angle in the range of 15 ° to 45 ° as described above, such a problem can be suppressed, and drainage can be improved.

  Further, in this embodiment, the drainage flowing down from the vertical pipe P1 does not hit the vertical rib 2, and only the drainage flow hitting the swirling blade 4 can flow toward the inclined vertical rib 2A. In addition, since the inclined vertical ribs 2A are arranged with the inclination angle θ, the protrusion size of the ribs can be increased, and effective drainage can be performed.

  As described above, in the collective joint according to the present embodiment, the prevention of the drainage of the drainage from the vertical pipe P1 by the revolving blades 4 to the horizontal pipe P2 and the prevention of the drainage from the horizontal pipe P2 to the other horizontal pipe P2. Compatibility can be achieved, and furthermore, the amount of protrusion in the horizontal pipe direction can be reduced so that clogging of drainage from the horizontal pipe P2 can be suppressed.

As described above, the embodiment of the collective joint according to the present invention has been described, but the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the gist thereof.
For example, in the above-described embodiment, the inclination angle θ of the inclined vertical rib 2A is set to 15 ° to 45 ° from the straight line Q connecting the base end portion 2a of the inclined vertical rib 2A and the pipe center O to the swirling blade 4 side. It is not limited to such an inclination angle θ. The tilt angle θ may be, for example, not less than 0 ° and less than 15 °, or may be more than 45 °. In short, it is only necessary that the inclined vertical ribs 2A gradually incline toward the revolving blades 4 with respect to the straight line Q from the base end 2a toward the protruding end 2b.

  Further, in the present embodiment, the projection length of the vertical rib 2 is such that the vertical rib 2 is located inside the inner peripheral surface Pa of the vertical pipe P1 connected to the vertical pipe connection portion 13 in plan view when viewed from the pipe axis direction X. Although it is set so as not to overhang, it is not limited to this.

  Further, the vertical ribs 2 (vertical ribs denoted by reference numeral 2B in the above-described embodiment) other than the inclined vertical ribs 2A located on the downstream end portion 4a side of the swirling blade 4 (drift plate) have the shape shown in the above-described embodiment, It can be installed without being limited to the configuration such as the size, the mounting position, and the number.

  In addition, the swirl vane 4 of the present embodiment is attached to the vertical bush 41 via the support leg 42, but is not limited to such a configuration. As long as it extends along the peripheral surface 11a and is arranged so as to be inclined with respect to the pipe axis direction X, the configuration of the shape, position, inclination angle, etc., of the drift plate is provided as long as drainage from the vertical pipe P1 hits. Can be changed as appropriate.

  Further, a sound insulating cover may be provided on the collective joint 10 as a sound insulating measure.

  Further, it is possible to appropriately replace the components in the above-described embodiment with known components without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Joint part 2 Longitudinal rib 2A Inclined vertical rib 2a Base end 2b Projecting end 3 Floor slab 4 Swirling blade (drifting plate)
4a Downstream end 10 Collective joint 11 Upper connecting pipe (pipe main body)
Reference Signs List 12 Lower connecting pipe 13 Vertical pipe connecting part 14 Horizontal pipe connecting part 14a Opening 41 Vertical bush 60 End treatment member P1 Vertical pipe P2 Horizontal pipe O Pipe center X Pipe axis direction Q Base end of inclined vertical rib and pipe center Straight line connecting

Claims (3)

A vertical pipe connecting portion capable of connecting a vertical pipe, and a pipe main body having a horizontal pipe connecting portion capable of connecting each of a plurality of horizontal pipes,
A drift plate that extends along the inner peripheral surface of the pipe body and is arranged to be inclined with respect to the pipe axis direction;
A vertical rib extending in the pipe axis direction, provided at least one between the openings of the horizontal pipe connection part in the circumferential direction of the inner circumference of the pipe main body, which is wrapped around the pipe center;
With
As the vertical rib, an opening of the horizontal pipe connecting portion located near the downstream end of the drift plate, and an inclined vertical rib disposed between the drift plate,
The inclined vertical ribs are, with respect to a straight line connecting the base end of the inclined vertical ribs and the center of the pipe of the pipe main body in a plan view viewed from the pipe axis direction, gradually from the base end toward the protruding end. , The assembly joint being inclined toward the side of the drift plate.   The assembly joint according to claim 1, wherein the inclined vertical rib is inclined toward the drift plate at an inclination angle of 15 ° to 45 ° with respect to the straight line.   The projecting length of the vertical rib is set so that the vertical rib does not protrude inward from the inner peripheral surface of the vertical pipe connected to the vertical pipe connection portion in a plan view viewed from the pipe axis direction. The collective joint according to claim 1 or 2, wherein:

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