JP5443012B2 - Drainage pipe structure and pipe joint used therefor - Google Patents

Description

  The present invention is a drainage pipe structure, in particular, crushing solid matter in the drainage at the connecting portion between the vertical drainage pipe and the horizontal drainage pipe on the downstream side thereof, and attenuating the water flow of the drainage to unit the unit time of the sanitary equipment The drainage pipe structure improved to prevent the negative pressure in the drainage pipe by preventing the drainage pipe from becoming clogged by relaxing the peak of the drainage flow rate (hereinafter referred to as the instrument drainage flow). It relates to the pipe joint used.

  If a large amount of drainage from the sanitary ware equipment flows into the drainage pipe vigorously, the drainage pipe tends to be blocked by the drainage, and if the drainage flows in such a way that the drainage pipe is blocked, the drainage upstream of the blocked portion There was a possibility that a negative pressure was generated in the pipe line, resulting in the destruction of the sealed water in the drain trap provided in the sanitary equipment facility. In particular, the above phenomenon is likely to occur when miscellaneous drainage pipes from hand-washing etc. are connected to drainage pipes from flush toilets with a high drainage flow rate. To prevent this, drainage pipes from flush toilets A measure such as providing a vent pipe in the middle and providing a Dorgo valve for preventing odor backflow at the upper end of the vent pipe is employed (see Patent Document 1).

  On the other hand, a drainage stack piped vertically through each floor of the multi-layered building, a drainage collecting pipe joint arranged for each floor with respect to this drainage standing pipe, and this drainage collecting pipe joint and toilet, etc. In a multi-layer building drainage system comprising a plurality of side branch pipes connected to a sanitary ware facility, and two of these side branch pipes are connected to a drainage collecting pipe joint in an opposed state. The drainage reduction member having the right and left side walls bulging outward and having an upright piece-shaped water bumper inside is provided in the horizontal portion of the horizontal branch pipe, so that the wastewater flowing into the drainage reduction member is supplied to the water bumper. A drainage system has been proposed in which the left and right drained water that have been collided are collided to the left and right, and the left and right drained water are joined and discharged while colliding on the back side of the water impingement part (see Patent Document 2).

  Also, in a multi-layered building drainage system in which a horizontal branch pipe that guides drainage from indoor hygiene equipment to a drainage collection pipe joint is connected to the drainage collection pipe joint in a substantially opposite state to the other side branch pipes, A drainage reduction member having a shape in which both side walls bulge outward is provided in the drainage portion, and a drainage collision wall that protrudes from the bottom wall to reach at least the center from one side wall is provided in the drainage reduction member. A system has also been proposed (Patent Document 3).

JP 2003-96892 A JP 2008-157000 A JP 2008-144470 A

  However, in the case of preventing the sealing failure of the flush toilet by means such as Patent Document 1, the work of connecting and piping the vent pipe in the middle of the drain pipe is troublesome, and an intake valve such as a Dorgo valve is also necessary Therefore, there is a problem that the cost is increased.

  On the other hand, the drainage systems of Patent Documents 2 and 3 are designed to prevent drainage from jumping over the drainage collecting pipe joint and flowing into the opposite side branch pipe by weakening the momentum of the drainage flowing through the side branch pipe with the drainage reduction member. Although it was not intended to prevent the occurrence of negative pressure in the horizontal branch pipe to prevent the sealing failure of the drain trap of the sanitary ware equipment, the flow cross-sectional area of the drainage reduction member is If the flow cross-sectional area is larger, even if the drainage flow is stagnated by the drainage reduction member, the stagnant drainage is stored in the drainage reduction member and the side branch pipe is unlikely to be full. Thus, the drainage trap of the sanitary equipment can be prevented from being broken due to the siphon phenomenon. However, as in the drainage reduction members of Patent Documents 2 and 3, a drainage collision wall extending from the bottom wall of the drainage reduction member to the central part from the upright piece-shaped water impingement part or side wall, The solid matter in the drainage flowing through the branch pipe is easily caught in the water impingement part and the drainage collision wall and remains inside the drainage reduction member, so that the residual solid matter can cause odors and insects and block the side branch pipe. It is difficult to say that it is preferable as a means for decelerating drainage.

  The present invention has been made under the above circumstances, and the problem to be solved is that the conventional vent pipe and the intake valve are not required, and the solid matter is crushed by means that does not cause the solid matter in the drainage to be caught. Drainage that damps the water flow and relaxes the peak of the drainage flow rate of the equipment, thereby preventing clogging of the drainage pipe and the generation of negative pressure in the drainage pipe to prevent the sealing failure of the drain trap. It is providing the pipe structure and the pipe joint used for this.

In order to solve the above-mentioned problem, the drainage pipe structure according to the present invention flows down the vertical drainage pipe on the inner upper surface side of the connection part between the vertical drainage pipe and the horizontal drainage pipe on the downstream side, and the inside of the connection part. A collision crushing part is formed, which crushes solids contained in the drainage that is rolled up on the upper surface side together with the drainage, and the lower end of the vertical drainage pipe is displaced from the center line of the horizontal drainage pipe to one side at the above connection part. It is characterized by that.

  Moreover, it is preferable that the said connection part is formed with the hollow bulging part which makes the solid substance and waste water which collided and collided with the collision crushing part hold | maintain temporarily, and flows out into a horizontal drain pipe.

  The collision crushing portion may have a flat collision surface, or may have a convex shape that is pointed downward.

On the other hand, the pipe joint according to the present invention, there is provided a pipe joint for use vertical drain pipe and the connecting portion of the lateral drainage pipe on the downstream side, the lateral drainage pipe connection port for connecting an upstream end of the horizontal drainage pipe and Included in the vertical drainage pipe connection port that connects the lower end of the vertical drainage pipe, shifted to the one side from the center line of the horizontal drainage pipe connection port, and the drainage that flows down the vertical drainage pipe and rolls up to the inner upper surface side of the pipe fitting A collision crushing portion formed on the inner upper surface side of the pipe joint, which crushes the solid matter collided with the drainage.

  In the drainage pipe structure of the present invention, the drainage flowing down the vertical drainage pipe is rolled up to the inner upper surface side at the connecting portion between the vertical drainage pipe and the horizontal drainage pipe, and the solid matter contained in the drainage is collided with the drainage along the collision crushing portion. It collides from below and is crushed, falls and flows out to the horizontal drain. Among solid materials, especially paper, if it flows into a horizontal drainage pipe without being crushed, it may unfold and flow down to close the vertical drainage pipe when it flows down a vertical drainage pipe with a large drop on the downstream side. Even if the amount of drainage is small and the drainage alone does not block it, the vertical drainage pipe may be blocked by paper, so crushing at the collision crushing section as described above is to prevent the drainage pipe from being blocked. It is extremely effective. Moreover, in the drainage structure of the present invention, since the collision crushing portion is formed on the inner upper surface side of the connection portion, not only the crushed solid matter but also the solid matter that is not easily crushed remains in the connection portion while being caught by the collision crushing portion. It will not remain. Therefore, it is possible to solve problems such as the residual solid matter becoming a source of odor and insects and causing the drainage pipe to be blocked.

  Moreover, as the drainage pipe structure of the present invention, the drainage flowing down the vertical drainage pipe is rolled up on the inner upper surface side of the connection part, collides with the collision crushing part and flows out to the horizontal drainage pipe, the water force is attenuated, Since the flow velocity is weakened, the equipment drainage flow rate is moderately balanced, and the peak of the equipment drainage flow rate is alleviated. It becomes difficult. Therefore, since generation | occurrence | production of the negative pressure in a drainage pipe line is suppressed, it can prevent that the drainage trap of the sanitary instrument equipment connected to the drainage pipe line is destroyed by a negative pressure.

  As described above, the drainage pipe structure of the present invention crushes solid matter in the wastewater by forming a collision crushing portion on the inner upper surface side of the connection portion between the vertical drainage pipe and the horizontal drainage pipe, Since the generation of negative pressure due to the blockage of the pipeline is suppressed to prevent the sealing water breakage of the drain trap of the sanitary ware equipment, the sealing breakage prevention communication as described in Patent Document 1 is performed. No trachea or intake valve is required, improving workability and reducing construction costs.

Furthermore, as in the drainage piping structure of the present invention, in the connection portion between the vertical drain pipe and the horizontal drainage pipe, the lower end of the vertical drain pipe is offset from the centerline of the horizontal drainage pipe to one side, the vertical drainage toward the collision grinding zone formed in the tube or al the upper surface side, to collide violently up forcefully winding wastewater, as well as improving the crushing action of the solids contained in the waste water, the attenuation of water force The action, the speed reduction action of the flow velocity, and the peak relaxation action of the apparatus drainage flow rate are improved, and the drainage pipe blockage and the generation of negative pressure can be sufficiently suppressed. In particular, when a collision crushing part is formed inside the upper surface of the connection portion is offset to the opposite side, is drained into collision crushing part which is displaced in the vertical drainage pipe or al opposition side was displaced to one side Since it rolls up very vigorously and collides violently, the solids crushing action, the water dampening action, the flow speed reducing action, and the device drainage flow peak relaxation action are further improved, and the object of the present invention can be sufficiently achieved. .

  Furthermore, a hollow bulging portion is formed at the connecting portion between the vertical drainage pipe and the horizontal drainage pipe, and the solid matter and drainage crushed by the collision crushing portion are temporarily retained in the hollow bulging portion to form a horizontal drainage pipe. Since the water flow is further attenuated, the flow velocity is further reduced, and the peak of the apparatus drainage flow rate is further eased, the negative pressure suppression effect and the blockage prevention effect of the drainage pipeline are further improved. Become.

  Even if the collision crushing portion is a flat surface, the collision crushing portion can sufficiently crush the solid matter in the drainage as long as the drainage rolls up and collides. Further, when the collision crushing portion has a convex shape that is pointed downward, the convex shape exerts a cutting action or a tearing action, so that even a solid material that is difficult to crush can be crushed.

In addition, using the pipe joint of the present invention, the vertical drain pipe and the horizontal drain pipe are respectively inserted by inserting the lower end of the vertical drain pipe and the upstream end of the horizontal drain pipe into the vertical drain pipe connection port and the horizontal drain pipe connection port, respectively. When connected, the solid matter contained in the drainage that flows down the vertical drainage pipe on the inner upper surface side of the connection portion between the vertical drainage pipe and the horizontal drainage pipe and collides with the drainage is caused to collide with the drainage. Thus, the drainage pipe structure of the present invention can be easily constructed in which a collision crushing part to be crushed is formed and the lower end of the vertical drainage pipe is displaced from the center line of the horizontal drainage pipe to one side at the connection part. .

It is explanatory drawing of the drain pipe line structure which concerns on one Embodiment of this invention. (A) (b) (c) is a top view, a front view, and a left side view of the pipe joint of the present invention used for the drainage pipe structure. It is the sectional view on the AA line of (c) of FIG. It is sectional drawing of the pipe joint which concerns on other embodiment of this invention. It is sectional drawing of the pipe joint which concerns on other embodiment of this invention. It is sectional drawing of the pipe joint which concerns on other embodiment of this invention. It is explanatory drawing of the drain pipe line structure which concerns on other embodiment of this invention. It is a perspective view of the pipe joint used for the drain pipe structure. It is the BB sectional drawing of FIG.

  Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows an example of a drainage pipe structure from a flush toilet. Reference numeral 1 denotes a western flush toilet installed on a floor surface 2 of a toilet. 1a, the drain trap part 1b which prevents the back flow of an odor, and the drainage channel part 1c of the downstream side are formed continuously. A vertical drainage pipe 4 under the floor is connected to the lower end of the drainage passage portion 1c via a connection adapter 3 attached to the floor surface 2. The downstream drainage pipe 4 and the downstream side piped under the floor are connected. The horizontal drain pipe 5 is connected via a pipe joint 6 having a hollow bulging portion 6 a that bulges to the opposite side of the horizontal drain pipe 5.

  In the above vertical drain pipe 4, the lower short pipe 4a connected via the elbow joint 4b is 5 ° to 60 ° on the hollow bulging portion 6a side (the side opposite to the horizontal drain pipe 5) of the pipe joint 6, preferably Is inclined at an inclination angle of 10 ° to 30 ° (inclination angle with respect to the vertical direction), and the drainage flowing down the vertical drainage pipe 4 is hollow in the pipe joint 6 by the short pipe 4a below the inclined vertical drainage pipe. It is guided toward the bulging portion 6a and smoothly flows into the hollow bulging portion 6a. The horizontal drain pipe 5 is also connected with a miscellaneous drain pipe 8 from other sanitary equipment such as a hand-washing 7.

  In the drainage pipe structure of this embodiment, only the short pipe 4 a at the lower part of the vertical drainage pipe is inclined, but the entire vertical drainage pipe 4 is inclined toward the hollow bulging portion 6 a of the pipe joint 6. You may comprise.

  As shown in FIGS. 2 and 3, the pipe joint 6 that connects the vertical drain pipe 4 and the horizontal drain pipe 5 is a vertical drain pipe connection port 6b to which the lower end (the lower short pipe 4a) of the vertical drain pipe 4 is connected. And a horizontal drainage pipe connection port 6c to which the upstream end of the horizontal drainage pipe 5 is connected, and a cylindrical hollow bulging portion 6a with a closed end that bulges on the opposite side of the horizontal drainage pipe connection port 6c. And an impact crushing portion 6d formed on the inner upper surface side of the hollow bulging portion 6a, and an inflow cylinder portion 6e communicating with the hollow bulging portion 6a from the vertical drain pipe connection port 6b It is inclined to the side opposite to the horizontal drainage pipe 5 at the same inclination angle as the short pipe 4a below the drainage pipe.

  The collision crushing portion 6d is included in the drainage that flows into the hollow bulging portion 6a of the pipe joint 6 from the vertical drainage pipe 4 (4a) and winds up to the inner upper surface side, as indicated by an arrow in FIG. Solid matter is collided with the waste water from below and crushed to prevent clogging of the drain pipe line by solid matter, and the water force is attenuated by the collision, the flow velocity is weakened, and the peak of the apparatus waste water flow rate is eased. In addition, the hollow bulging portion 6a temporarily damps the solid matter and drainage crushed by the collision crushing portion 6d and flows them out to the horizontal drainage pipe, thereby further attenuating the water flow and further reducing the flow velocity. This peak is further relaxed.

  As shown in FIG. 2 (a), the vertical drain pipe connection port 6b and the inflow cylinder part 6e of the pipe joint 6 are connected to the center line CL1 of the cylindrical hollow bulge part 6a and the center of the horizontal drain pipe connection port 6c. The inflow cylinder portion 6e is formed to be deviated from the line CL2 to one side (right side in FIG. 2), and the inflow cylinder portion 6e is formed from the side portion of the hollow bulging portion 6a to the bottom portion as shown in FIGS. It is formed so as to bend around. Therefore, the drainage flowing down the vertical drainage pipe 4 (4a) passes through the curved inflow cylindrical portion 6e and vigorously along the inner peripheral surface of the cylindrical hollow bulging portion 6a as shown by an arrow in FIG. It comes to roll up.

  On the other hand, as shown in FIGS. 2 and 3, the collision crushing portion 6d is formed on the side opposite to the vertical drain pipe connection port 6b by shaping a part of the upper wall of the hollow bulging portion 6a into a concave step shape. It is displaced and formed on the inner upper surface side of the hollow bulging portion 6a. The collision crushing part 6d may be formed without being deviated, but as described above, when it is deviated to the side opposite to the vertical drain pipe connection port 6b and formed on the inner upper surface side of the hollow bulging part 6a, Since the discharged waste water collides violently with the collision crushing portion 6d, the crushing action of solid matter, the dampening action of the water force, the speed reduction action of the flow velocity and the like are improved. Although the collision surface (lower surface) of the collision crushing portion 6d is a flat surface, the waste water that has been rolled up vigorously as described above collides violently, so even solid surfaces can be sufficiently crushed. can do.

  As in the pipe joint 61 shown in FIG. 4, the collision surface of the collision crushing portion 6d may be an uneven surface having a sawtooth cross-sectional shape. Things can be easily crushed. Since the other structure of this pipe joint 61 is the same as that of the said pipe joint 6, the same code | symbol is attached | subjected to the same part and description is abbreviate | omitted.

  Moreover, you may form the collision crushing part 6d in the convex shape sharpened downward like the pipe joint 62 shown in FIG. Typical examples of the convex shape are ridges and cones, but any of them may be used, and the tip portion of the convex shape may be formed in a saw blade shape. When such a convex collision crushing portion 6d is formed, the convex shape exerts a cutting action or a tearing action, so that even a fibrous solid matter that is not easily crushed can be easily crushed. Since the other structure of this pipe joint 62 is the same as that of the said pipe joint 6, the same code | symbol is attached | subjected to the same part and description is abbreviate | omitted.

  The collision crushing part 6d of the pipe joints 6, 61, 62 described above is formed on the inner upper surface side of the hollow bulging part 6a by shaping a part of the upper wall of the hollow bulging part 6a into a concave step shape or a valley shape. Although integrally formed, like the pipe joint 63 shown in FIG. 6, the collision crushing part 6d is fixed by fixing the collision crushing member 60d having a desired shape on the inner upper surface of the hollow bulging part 6a with an adhesive or the like. May be formed.

  The hollow bulging portion 6a of the pipe joint 6 has a transverse opening area (an opening area when cut in a direction perpendicular to the center line CL1 of the hollow bulging portion 6a) as a transverse opening area ( It is composed of a horizontal cylindrical hollow bulging portion whose one end is closed, which is larger than the opening area when cut perpendicularly to the center line of the horizontal drain pipe 5, and is connected to the vertical drain pipe connection port 6b and the inflow It bulges in the opposite direction to the horizontal drain pipe connection port 6c with the cylinder part 6e as a boundary. For this reason, the internal volume of the hollow bulging portion 6a increases and the amount of temporary retention of the drainage increases, and the drainage is guided temporarily to the hollow bulging portion 6a that bulges in the opposite direction to the horizontal drainage pipe 5. Then, it reverses and flows out to the horizontal drainage pipe 5, so that a good water-damping action, a speed-lowering action, and a peak-relaxing action of the apparatus drainage flow rate are exhibited.

  Further, the cylindrical hollow bulging portion 6a is provided with an inclination, and is inclined so that its bottom surface becomes lower as it approaches the horizontal drainage pipe connection port 6c. The gradient of the bottom surface needs to be equal to or greater than the flow gradient of the horizontal drain pipe 5 (usually about 2/100), and is preferably about 3/100 to 50/100. When the bottom surface of the hollow bulging portion 6a is sloped in this way, the waste water temporarily retained in the hollow bulging portion 6a and the pulverized solids flow smoothly through the sloped bottom surface and beside. Since it flows out to the drain pipe 5, the pulverized solid does not remain in the hollow bulging portion 6a.

  In this pipe joint 6, the hollow bulging portion 6a is formed in a cylindrical shape having a perfectly circular cross section so that the drained water that flows in is smoothly rolled up along the inner peripheral surface. May be formed in an elliptical cylindrical shape, and a collision crushing portion may be provided on the inner upper surface side.

  Desirably, the hollow bulging portion 6a has an internal volume capable of temporarily retaining 5% or more, preferably 10 to 80%, of the total amount of drainage discharged from the sanitary equipment such as the toilet 1 at a time. The hollow bulging portion 6a having such an internal volume has a peak relaxation action of the instrument drainage flow rate, that is, an action of appropriately leveling the instrument drainage flow rate by reducing the peak flow rate at which the instrument drainage flow rate becomes maximum. The drainage pipe can be sufficiently prevented from being blocked in synergy with the water dampening action and the deceleration action. The more preferable internal volume of the hollow bulging portion 6a is 20 to 60% of the total amount of drainage.

  Such a pipe joint 6 may be manufactured by integrally molding with a thermoplastic synthetic resin, or by dividing into a plurality of parts and joining and integrating them with an adhesive or the like. In that case, the entire pipe joint 6 or the hollow bulging portion 6a is formed of a transparent synthetic resin so that the inspection and maintenance of the pipe fitting 6 can be easily performed, and a lid is attached to an appropriate position of the hollow bulging portion 6a. A maintenance opening (not shown) may be provided.

  Using the pipe joint 6 configured as described above, the lower end (the lower short pipe 4a) of the vertical drain pipe 4 is connected to the vertical drain pipe connection port 6b, and the horizontal drain pipe 5 is connected to the horizontal drain pipe connection port 6c. As shown in FIG. 1, the drainage pipe constructed by connecting the upstream end is a cylindrical hollow bulging portion 6 a whose one end is closed at the connecting portion between the vertical drainage pipe 4 and the horizontal drainage pipe 5. Is formed to bulge in the opposite direction to the horizontal drainage pipe 5, and the collision crushing part 6d (flowing down the vertical drainage pipe 4 to the hollow bulging part 6a on the inner upper surface side of the hollow bulging part 6a of this connection part. It has a structure in which a collision crushing part) is formed in which solid matter contained in the waste water that is rolled up on the inner upper surface side collides with the waste water. And the lower end (lower short pipe 4a) of the vertical drain pipe 4 inclined to the opposite side to the horizontal drain pipe 5 is displaced to one side from the center line of the horizontal drain pipe 5, and the collision crushing portion 6d is displaced to the opposite side. As described above, it is formed on the inner upper surface side of the hollow bulging portion 6a, and the transverse opening area of the hollow bulging portion 6a is larger than the transverse opening area of the horizontal drainage pipe 5, and the bottom surface of the hollow bulging portion 6a. Has a gradient greater than the flow gradient of the horizontal drain pipe 5.

  In such a drainage pipe structure, the drainage flowing down the vertical drainage pipe 4 is guided toward the hollow bulging portion 6a on the side opposite to the horizontal drainage pipe 5 by the short pipe 4a below the inclined vertical drainage pipe, It flows into the hollow bulging portion 6a from the curved inflow cylindrical portion 6e and rolls up vigorously along the inner peripheral surface of the hollow bulging portion 6a, and the solid matter contained in the drainage is lowered to the collision crushing portion 6d together with the drainage. It is crushed by violent collision. Then, the solid matter and drainage crushed by the collision crushing portion 6d reach the inner side of the hollow bulging portion 6a and temporarily stay, reverse and flow out to the horizontal drainage pipe 5.

  As described above, when the solid matter in the wastewater is crushed by the collision crushing portion 6d, the concern that the drainage pipe is blocked by the solid matter, in particular, the paper that expands and spreads in the drainage pipe, is eliminated. Since the collision crushing portion 6d is formed on the inner upper surface side of the hollow bulging portion 6d, not only the crushed solid matter but also the solid matter that is hard to crush is not caught on the collision crushing portion 6d, and the inclined hollow The bottom surface of the bulging portion 6d flows smoothly along with the drainage and flows out to the horizontal drainage pipe 5. Accordingly, not only the crushed solid matter but also the solid matter that is hard to be crushed does not remain in the hollow bulging portion 6d, so that the residual solid matter becomes a source of odor and insects or causes the drainage pipe to be blocked. Can be solved.

  Further, as described above, when the drainage that has been rolled up inside the hollow bulging portion 6d collides with the collision crushing portion 6d, the water force is attenuated and the flow velocity is reduced, and thus the water force and the flow velocity are weakened. When the drainage and the crushed solid matter temporarily stay in the hollow bulging portion 6a and flow into the horizontal drainage pipe 5, the water force is further attenuated, the flow velocity is further reduced, and the peak of the apparatus drainage flow rate is sufficiently relaxed. Therefore, even if a large amount of drainage is flushed from the toilet 1 at once, the drainage pipe is not easily blocked. Accordingly, since the generation of negative pressure in the drain pipe is suppressed, the drain trap 1b of the toilet 1 connected to the drain pipe, the drain trap 7a of the hand wash 7 and the like are sealed and destroyed by the negative pressure. Can be prevented.

  As described above, this drainage pipe structure crushes solid matter in the wastewater by forming the collision crushing part 6d and the hollow bulging part 6a at the connection part between the vertical drainage pipe 4 and the horizontal drainage pipe 5. At the same time, since negative pressure caused by blockage of the drainage pipe is suppressed and the sealing trap of the drainage trap of the sanitary ware equipment is prevented, the vent pipe and the intake valve for preventing the sealing water breakage are completely unnecessary. And since it can construct simply by connecting the vertical drain pipe 4 and the horizontal drain pipe 5 using the pipe joint 6 of this invention, construction cost can be reduced and workability can be improved.

  In the drainage pipe structure shown in FIG. 7, the vertical drainage pipe 4 and the horizontal drainage pipe 5 are connected using a pipe joint 64 different from the pipe joint 6 in that the vertical drainage pipe 4 is vertically plumbed. This is different from the drain pipe structure of the above embodiment.

  As shown in FIGS. 8 and 9, the pipe joint 64 used in this drainage pipe structure is formed in a semi-cylindrical shape in which the hollow bulging portion 6a has a flat upper wall portion 6f and one end is closed. The diameter of the semi-cylindrical hollow bulging portion 6 a is larger than the diameters of the vertical drainage pipe 4 and the horizontal drainage pipe 5. And the vertical drain pipe connection port 6b is formed in the corner part of the upstream of the upper wall part 6f, and the horizontal drain pipe connection port 6c is formed in the side wall lower part of the downstream side of the hollow bulging part 6a. The side wall on the downstream side where the horizontal drainage pipe connection port 6c is formed is a tapered wall as shown in FIG. 8, so that the drainage temporarily retained in the hollow bulging portion 6a is smooth. It flows out to the horizontal drain. Further, the lower surface (inner surface) of the upper wall portion 6f of the hollow bulging portion 6a is included in the drainage that flows into the hollow bulging portion 6a from the vertical drain pipe 4 and rolls up along the inner peripheral surface of the hollow bulging portion 6a. The collapsible crushing portion 6d is crushed by colliding with the drainage from below with the drainage, and the bottom wall portion of the hollow bulging portion 6a is given a gradient equal to the flow gradient of the horizontal drainage pipe 5. However, it goes without saying that a gradient greater than the flow gradient of the horizontal drainage pipe 5 may be provided in the same manner as the pipe joint 6.

  In the pipe joint 64 of this embodiment, the lower surface of the upper wall portion 6f of the hollow bulging portion 6a, which becomes the collision crushing portion 6d, is formed as a flat surface. May be. The vertical drainage pipe connection port 6b and the horizontal drainage pipe connection port 6c are formed on the upper wall part 6f and the lower part of the side wall of the hollow bulging part 6a via the short cylinder part. You may form in the side wall lower part. Further, the vertical drain pipe connection port 6b may be formed near the center of the left or right side of the upper wall portion 6f.

  Since the other structure of the drain pipe structure shown in FIG. 7 is the same as the drain pipe structure of the embodiment shown in FIG. 1, the same reference numerals are given to the same members in FIG. .

  7 as well as the drainage pipe structure of FIG. 7, the drainage flowing into the hollow bulging portion 6a of the pipe joint 64 from the vertical drainage pipe 4 is rolled up along the inner peripheral surface of the hollow bulging portion 6a and is included in the drainage. Collision crushing part after solid matter collided violently collided from below with collision crushing part 6d on the lower surface of upper wall part 6f of hollow bulging part together with drainage and temporarily staying in hollow bulging part 6a It flows out to the horizontal drain pipe 5 without being caught by 6d. For this reason, the concern that the drainage pipe is blocked by the solid matter, in particular, the paper spreading and spreading in the drainage pipe, is eliminated, and the solid matter is caught by the collision crushing part 6d and remains in the hollow bulging part 6d. Therefore, it is possible to solve problems such as residual solids becoming a source of odor and insects and causing drainage pipes to be blocked. Then, the water flow is attenuated by the collision with the collision crushing portion 6d, the flow velocity is reduced, and further, the water flow is further attenuated and the flow velocity is further reduced by temporarily staying in the hollow bulging portion 6a. Because the peak of the drainage flow rate of the instrument is sufficiently relaxed, even if a large amount of drainage is forced to flow from the toilet 1 at once, it becomes difficult for the drainage pipe to be blocked, and the generation of negative pressure in the drainage pipe is suppressed. Therefore, it is possible to prevent the drainage trap 1b of the toilet 1 and the drainage trap 7a of the hand-washing 7 from being sealed with water due to negative pressure. Also, simply connecting the vertical drainage pipe 4 and the horizontal drainage pipe 5 using the pipe joint 64 enables easy construction without providing any vent pipe or intake valve for preventing the sealing water breakage. Workability can also be improved.

DESCRIPTION OF SYMBOLS 1 Toilet 4 Vertical drainage pipe 4a Short pipe of vertical drainage pipe lower part 5 Horizontal drainage pipe 6,61,62,63,64 Pipe joint 6a Hollow bulging part 6b Vertical drainage pipe connection port 6c Horizontal drainage pipe connection port 6e Inflow cylinder part CL1 Center line of hollow bulge CL2 Center line of horizontal drainage pipe

Claims (5)

Solid matter contained in the drainage that flows down the vertical drain pipe and winds up to the internal upper face side of the connection part collides with the drainage on the inner upper surface side of the connection part between the vertical drain pipe and the downstream horizontal drain pipe. A drainage pipe structure characterized in that a collision crushing part for crushing is formed, and the lower end of the vertical drainage pipe is displaced from the center line of the horizontal drainage pipe to one side at the connecting portion . According to claim 1, characterized in that the hollow bulge portion to flow out temporarily retained drainage and solids were broken by colliding with the collision crushing part lateral drain pipe is formed in the connecting portion Drainage pipe structure. The drain pipe structure according to claim 1 or 2 , wherein a collision surface of the collision crushing portion is a flat surface. The drain pipe structure according to claim 1 or 2 , wherein the collision crushing portion has a convex shape pointed downward. A pipe joint for use vertical drain pipe and the connecting portion of the lateral drainage pipe on the downstream side, a horizontal drainage pipe connection port for connecting an upstream end of the lateral drainage pipe, from the center line of the horizontal drainage pipe connecting port A vertical drainage pipe connection port that connects to the lower end of the vertical drainage pipe, which is displaced to one side, and the solid matter contained in the drainage that flows down the vertical drainage pipe and rolls up to the inner upper surface of the pipe joint, collide with the drainage. And a crushing crushing part formed on the inner upper surface side of the pipe joint.

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