JP6721305B2 - Drainage system - Google Patents

Description

The present invention , a leg joint that is continuous with the horizontal main pipe, through the floor slab of the lowest layer, is connected to the leg joint, and a drain pipe joint configured to connect the drainage stack and the lateral branch pipe, A drainage system comprising :

Conventionally, as a drainage pipe joint to be connected to a leg joint connected to a horizontal main pipe in a drainage system , it is arranged so as to penetrate a floor slab in the lowest layer (lowermost floor) and can be connected to the lower end of a drainage stack pipe. Is provided between the upper connection part having a large receiving port, the lower connection part that can be connected to the receiving port of the upper end of the leg joint, and the upper connection part and the lower connection part, and can connect the lateral branch pipe. And a body portion having a lateral branch pipe connection portion (see, for example, Patent Document 1). Further, in this drainage pipe joint, the lower connection portion is formed in a straight tube shape so that the drainage pipe joint can be connected to the leg joint even if cut to an arbitrary length. Furthermore, in this drainage pipe joint, the nominal diameter of the lower connection part should be the same as the nominal diameter of the upper connection part so that excessive positive pressure due to the drainage flowing down to the leg joint, which causes factors such as the breaking of the drain trap, does not occur. In addition, the size is increased from 1 size to 2 sizes, and the rectifying ring is provided on the inner peripheral surface of the lower connecting portion.

In addition, as a conventional drainage pipe joint, there is a drainage pipe joint in which the portion arranged on the upper surface side of the floor slab is composed of upper and lower connecting portions in two steps and is configured to be separable from each other. (See, for example, Patent Document 2). Each of the upper connection part and the lower connection part has a lateral branch pipe connection part capable of connecting a lateral branch pipe, and has swirlability for drainage in order to prevent generation of excessive positive pressure due to drainage. The turning guide to give was provided. Further, the upper connection portion and the lower connection portion are configured by providing a flange portion provided with a plurality of through holes for bolts at mutual connection portions so that the bolts can be passed through and the nuts can be fixed.

JP, 2005-86613, A JP 2004-3313 A (see FIGS. 6 and 7)

However, in the conventional drainage pipe joint connected to the leg joint, the nominal diameter of the lower connection portion is set to be 1 mm smaller than the nominal diameter of the upper connection portion so that excessive positive pressure due to drainage flowing down to the leg joint does not occur. Since the size is set to be two larger than the size, it is necessary to open a large through hole provided in the floor slab, and the leg joint is also increased in size. Therefore, it has been desired to make the lower connecting portion compact. Further, if the rectifying ring provided in the lower connecting portion is arranged on the lower side, the area to be cut for length adjustment becomes shorter, so that the slope of drainage (the slope of the horizontal main pipe) can be secured. , The height of the leg joint to which the horizontal main pipe is connected should be cut as short as possible to cut the lower connection part in order to place it as close as possible to the ceiling surface of the floor slab so that it will be difficult to handle. ..

Further, in a drainage pipe joint including an upper connection portion and a lower connection portion that are divided into two, since the upper and lower two-stage swivel guides are arranged, this drainage pipe joint is If it is arranged so that the leg joints are connected by penetrating the floor slab, it is possible to prevent the generation of excessive positive pressure due to drainage flowing down to the leg joints, and The size expansion can be suppressed. However, in this drainage pipe joint, it is necessary to connect the upper connection part and the lower connection part one by one using bolts and nuts, and since the flange part for mutual connection is bulky, it is easy to handle. It's inconvenient.

The present invention is intended to solve the problems described above, be configured to connect the drainage fitting the leg joints to penetrate the bottom layer of the floor slabs, to ensure good drainage performance, the drainage pipe fittings the lower connection portion can be configured compactly and an object to provide a drainage system to be convenient for handling drainage pipe fittings.

The drainage system according to the present invention has a configuration in which a leg joint connected to a horizontal main pipe and a floor slab in the lowest layer are penetrated to be connected to the leg joint, and a drainage stack and a lateral branch pipe are connected to each other. A drainage system comprising a drainage pipe joint,
The drain pipe joint,
An upper connection portion that is disposed on the upper side and has a receiving port that can be connected to the lower end portion of the drainage stack pipe,
A lower connecting portion that is arranged on the lower side and that can be connected to the receiving port of the upper end of the leg joint,
A body portion having a lateral branch pipe connecting portion that is disposed between the upper connecting portion and the lower connecting portion and that can connect the horizontal branch pipe,
Is configured with
The body is
The diameter is expanded from the receiving port of the upper connecting portion, and is composed of two upper and lower areas of an upper portion on the upper side and a lower portion on the lower side,
It is provided with two swivel guides that give swirlability to the drainage flowing down from the drainage stack in a counterclockwise direction when viewed from above, and the two swivel guides face each other with the axis of the body part in between, and The upper side portion and the lower side portion which are vertically displaced are arranged to be arranged,
As a configuration in which the lateral branch pipe connection portion is not disposed on the upper portion of the trunk portion but is disposed only on the lower portion of the trunk portion, the height of the turning guide on the lower side of the trunk portion is set. Is located at a position orthogonal to the facing direction of the upper and lower swivel guides about the axis of the body, or faces the lower swivel guide about the axis of the body. Position, either of the configuration,
The lower connecting portion is arranged so as to be capable of penetrating the floor slab from the upper end, and is formed so as to extend downward in a straight tubular shape from the lower end of the tapered portion of the lower constriction of the lower end of the body portion, and Adjustable, the bottom end can be cut,
It is characterized in that the upper connecting portion, the body portion, and the lower connecting portion of the drain pipe joint are integrally formed without using a bolt or a nut.

In the drainage system according to the present invention, the body arranged on the floor slab of the drainage pipe joint is opposed to each other with the axis of the body in between, and is vertically displaced so that two swivel guides are provided. Therefore, even if the nominal diameter of the lower connection portion is not increased, the drainage flowing to the leg joint is given a swirling property counterclockwise when viewed from above, and the air core can be arranged at the center, Since it is possible to prevent the occurrence of excessive positive pressure and the like, the lower connection portion can be configured compactly, the through hole of the floor slab can have a small diameter opening, and the leg joint can be prevented from increasing in size.

Further, the lower connection portion of the drainage pipe joint can be arranged so as to penetrate the floor slab from the upper end, and is formed so as to extend downward in a straight tube shape from the lower end of the tapered portion of the lower constriction of the lower end of the body portion. The length is adjustable and the lower end can be cut, and if the floor slab can be penetrated and the length dimension to be connected to the receiving port of the leg joint can be secured, the lower end side is not restricted. Since it can be cut short, the leg joints can be easily placed close to the ceiling surface of the floor slab, and a good drainage gradient of the horizontal main pipe can be secured.

Further, the upper connection portion, the body portion, and the lower connection portion of the drainage pipe joint are integrally formed without using bolts or nuts, and there is no flange portion for connecting the respective portions to each other, which is bulky. In addition, since the work for connecting using a bolt or the like is unnecessary, it is convenient for handling.

Furthermore, the horizontal branch pipe connecting portion for connecting the horizontal branch pipe of the drainage pipe joint is disposed at the height position of the lower turning guide in the trunk, and the vertical turning is performed around the axis of the trunk. A configuration that is arranged either at a position orthogonal to the facing direction of the guide or at a position facing the lower turning guide centering on the shaft center of the trunk, in other words, the lower position around the shaft center of the trunk. With respect to the arrangement position of the swivel guide on the side, it can be arranged at three positions shifted by 90°, and even if a plurality of horizontal branch pipe connection portions are provided so that a plurality of horizontal branch pipes can be connected. , Those arrangement positions are positions where it is possible to easily prevent the backflow of the wastewater flowing down from the drainage stack to the lateral branch pipes connected to the respective lateral branch pipe connection portions, and as a result, the lateral position of the bottom layer. Backflow to the branch pipe can be prevented, and drainage from the lowermost lateral branch pipe can be smoothly made to flow down to the leg joint.

Then, in the drainage system according to the present invention, the receiving port of the upper connection portion of the drainage pipe joint is configured to be connected to the drainage stack pipe having the same nominal diameter as the nominal diameter of the lower connection portion. Is desirable.

In such a configuration, as the drainage pipe joint, the upper connecting portion and the lower connecting portion can have the same nominal diameter, so that not only the lowermost layer but also the upper drainage vertical pipe and the lower drainage vertical pipe with the floor slab in between. It can be used as a drainage pipe joint configured to connect with. In addition, since the lower connection part extends downward from directly below the trunk to a straight tube shape, at the time of repairing, the straight through hole of the floor slab that was the trace of the existing drainage pipe joint should be cut as much as possible. Since the lower connection part of the drainage pipe joint of the present invention can be inserted and repaired without cutting (cutting only the minimum clearance), the drainage stack can be easily renewed.

Further, in the drainage system according to the present invention, the horizontal branch pipe connection portion of the drainage pipe joint is of the upper turning guide in a direction orthogonal to the facing direction of the upper and lower turning guides about the axis of the body. It is desirable to be arranged at a position close to the lower end and the upper end of the lower swivel guide, and a position facing the lower swivel guide around the axis of the body. ..

In such a configuration, even if the two lateral branch pipe connection portions are arranged in the body portion of the drainage pipe joint , it is possible to stably prevent backflow of drainage flowing down from the drainage stack pipe to the lateral branch pipe, and It is possible to collect the drainage from the lateral branch pipes of the two systems to smoothly flow down.

The drainage system according to the present invention ensures good drainage performance even when the drainage pipe joint is connected to the leg joint by penetrating the floor slab of the lowest layer, and the lower connection portion of the drainage pipe joint is made compact. configuration can Rutotomoni can suppress an increase in the size of the leg joint, also the handling of the drainage pipe joint also becomes convenient, perform the installation work on site efficiently.

It is a schematic longitudinal cross-sectional view explaining the disposition state of the drainage pipe joint of one embodiment according to the present invention on the floor slab. It is a partial longitudinal cross-sectional view of the drainage pipe joint of the embodiment. It is a top view of the drainage pipe joint of an embodiment. It is a cross-sectional view of the drainage pipe joint of the embodiment, and corresponds to the IV-IV site in FIG. 2. It is a schematic longitudinal cross-sectional view explaining a state in which the drainage pipe joint of the embodiment is arranged on a thick floor slab. It is a schematic longitudinal cross-sectional view explaining a state in which the drainage pipe joint of the embodiment is arranged on a floor slab having a thin thickness. It is a schematic longitudinal section showing a drainage pipe joint of a modification of an embodiment. It is a top view of the drainage pipe joint shown in FIG. It is a front view which shows the water collection guide and the backflow prevention wall of the drainage pipe joint shown in FIG.

An embodiment of the present invention will be described below with reference to the drawings. The drainage pipe joint 10 used in the drainage system of the embodiment can be connected to the lower end portion 1a of the drainage stack 1 as shown in FIGS. Is provided between the upper connecting portion 11 having the large receiving port 15, the lower connecting portion 35 connectable to the receiving port 5a at the upper end of the leg joint 5, and the upper connecting portion 11 and the lower connecting portion 35, It is configured by including a body portion 20 having lateral branch pipe connecting portions 28 and 28A capable of connecting the lateral branch pipe 2. The drainage pipe joint 10 of the embodiment is a cast product made of cast iron or the like, except for packings 17 and 31 described later, and the upper connection portion 11, the body portion 20, and the lower connection portion 35 use bolts or nuts. Without, it is integrally formed.

The upper connecting portion 11 is provided with a receiving port 15 in which a packing 17 is arranged on the inner peripheral side and the upper side is opened, a flange portion 12 is formed on the outer periphery on the upper end side, and an inner peripheral side on the lower end side is formed. It is configured by projecting the step portion 14.

The packing 17 ensures the sealing property with the drainage stack 1, and is provided by being fitted into the concave groove 13 above the step portion 14 on the inner peripheral side of the upper connection portion 11. The packing 17 is a well-known one, and although the reference numeral is omitted, the packing 17 is provided so as to project from the cylindrical main body and the inner peripheral side of the lower end of the main body, and receives the lower end 1a of the drainage stack 1. A flange portion that is pressed against the upper surface side of the step portion 14 and a lip portion that is provided so as to project in a plurality of steps on the inner peripheral surface side of the main body portion are configured.

The body portion 20 has a substantially cylindrical shape whose diameter is expanded from the receiving port 15 and further expanded (about 1.5 times) from the outer diameter dimension of the drainage stack 1, and the upper portion 21 on the upper side and the lower portion on the lower side. It is composed of two areas including the side portion 22. The upper part 21 is configured by disposing an upper swivel guide 24, and the lower part 22 is configured by disposing a lower swivel guide 26 and side branch pipe connecting parts 28, 28A.

The swivel guides 24, 26 give a swivel property to the drainage flowing down from the drainage stack 1 counterclockwise when viewed from above, and make the drainage flow down to the leg joint 5 in a state where the air core is provided at the center. is there. The swivel guides 24, 26 face each other with the axis C0 of the body portion 20 in between, and are vertically displaced so as to be arranged in the upper portion 21 and the lower portion 22.

The upper turning guide 24 is set to have an inclination angle θu within the range of 30 to 50° with reference to the horizontal plane along the axis C1 of the lateral branch pipe connecting portion 28 (in the embodiment, the best mode is 40°). ), so that the drainage flowing down from the drainage stack 1 is decelerated and swung. The end face 24b on the axial center C0 side is provided with a corner portion 24c in the vicinity of the axial center C0, and on the lower side of the corner portion 24c, a lower end face 24e parallel to the axial center C1 of the lateral branch pipe connecting portion 28 and an upper portion. When viewed from the side, the lower end face 24e and the upper end face 24d having an intersecting angle θ1 of about 140° and extending linearly upward from the corner portion 24c are configured.

The lower end face 24e of the swivel guide 24 has a distance Hu between the axis C1 of the lateral branch pipe connecting portion 28 and the axis C0 in the orthogonal direction, which is about 1/5 to 1 of the inner diameter of the drainage stack 1. It is set within the range of /3 (preferably about ¼). Incidentally, in the case of the illustrated example, the nominal diameter of the vertical pipe 1 is 100, and the distance Hu is within the range of 100/5 to 100/3, and in the embodiment, the best mode is approximated to 25 mm of 100/4. It is set to 22 mm.

Further, the upper surface 24a of the swivel guide 24 that receives the drainage has a downward inclination angle of 2 to 30 with reference to a vertical plane perpendicular to the axis C1 of the lateral branch pipe connecting portion 28 that passes through the axis C0 of the body portion 20. Within the range of 5° (5° in the embodiment).

Furthermore, the lower end portion 24g of the turning guide 24 is arranged in the inner peripheral surface 20a of the body portion 20 in the vicinity of a position directly above the upper edge 28c of the lateral branch pipe connecting portion 28.

The lower swivel guide 26 has an inclination angle θd set within a range of 50 to 70° with reference to the horizontal plane along the axis C1 of the lateral branch pipe connecting portion 28 (in the embodiment, the best mode is set to 60°). It is arranged so that the drainage flowing down from the drainage stack 1 is decelerated and swung. The end face 26b on the axial center C0 side is provided with a corner portion 26c in the vicinity of the axial center C0, and as the upper side of the corner portion 26c, an upper end face 26d parallel to the axial center C1 of the lateral branch pipe connecting portion 28 and an upper side. The upper end surface 26d and the lower end surface 24e, which has a crossing angle θ2 of about 150° and extends substantially linearly downward from the corner portion 26c, are configured.

In addition, the upper end surface 26d of the swivel guide 26 has a distance Hd between the axis C1 of the lateral branch pipe connecting portion 28 and the axis C0 in the orthogonal direction, which is approximately 1/3 to 1/of the inner diameter of the drainage stack 1. It is within the range of 2 (preferably about 2/5). By the way, in the case of the illustrated example, the vertical diameter of the vertical pipe 1 is 100, and the distance Hd is within the range of 100/3 to 100/2. In the embodiment, the best mode is 100×2/5, which is 40 mm. ..

Further, the upper surface 26a of the swivel guide 26 that receives the drainage has a downward inclination angle of 2 to 30 with reference to a vertical plane orthogonal to the axis C1 of the lateral branch pipe connecting portion 28 that passes through the axis C0 of the body portion 20. Within the range of 5° (5° in the embodiment).

Furthermore, at the upper and lower ends 26f and 26g of the swivel guide 26, when viewed from above, in the vicinity of the inner peripheral surface 20a of the drainage stack 1, a convex curved surface is formed on the inner peripheral surface 20a side of the body portion 20. As a condition, it is configured to approach rapidly. In addition, the height position of the upper end portion 26f is below the lower end portion 24g of the turning guide 24 and near the upper edge 28c of the lateral branch pipe connecting portion 28 on the inner peripheral surface 20a of the body portion 20. The height position is near the position directly above the lower edge 28d of the lateral branch pipe connection portion 28.

The corner portions 24c and 26c of the turning guides 24 and 26 are arranged at positions facing each other with the axis C0 of the body portion 20 in between.

The inter-guide distance Gh between the swivel guides 24 and 26 along the axis C0 is set to 130 mm.

The lateral branch pipe connecting portions 28, 28A are not arranged on the upper portion 21 of the body portion 20, but are arranged only on the lower portion 22 of the body portion 20 , and the lower side turning of the body portion 20 is performed. As the height positions of the guides 26, they are arranged at the same height position. In addition, in detail, the lower edge 28d of the inner peripheral surface 20a of the body portion 20 is arranged slightly below the lower end portion 26g of the turning guide 26.

Then, the lateral branch pipe connecting portion 28 is located at a position orthogonal to the facing direction of the upper and lower turning guides 24, 26 about the axis C0 of the body portion 20, and further, the lower end portion 24g of the upper turning guide 24 and the lower side. It is arranged at a position closer to the upper end 26f of the turning guide 26. The lateral branch pipe connection portion 28A is arranged at a position facing the lower swivel guide 26 about the axis C0 of the body portion 20.

Each of the lateral branch pipe connection portions 28 and 28A has a substantially cylindrical shape, and a step portion 28a narrowing inward is formed at the tip, and a packing 31 is fitted from the tip surface to the inner peripheral surface. On the upper edge 28c side of the inner peripheral surface on the base side of the lateral branch pipe connecting portions 28, 28A, a stopper portion 29 that supports the end surface of the lateral branch pipe 2 at the time of connection is formed, and on the outer peripheral surface 29a of the stopper portion 29. A lateral branch pipe receiving member 29b made of rubber or the like is fixed.

The packing 31 is a well-known one that secures a sealing property with the lateral branch pipe 2, and is a substantially cylindrical body formed of rubber or the like, and a reference numeral is omitted, but a substantially cylindrical body portion. And a flange portion formed so as to extend radially outward from the entire circumference in the front end side of the main body portion, and a thin lip portion arranged on the entire circumference in the circumferential direction on the base portion side of the main body portion. And are provided. The flange portion is formed so as to be fitted onto the outer peripheral surface side of the step portion 28a. The lip portion of the packing 31 is provided so as to project from the cylindrical main body portion of the packing 31 toward the body portion 20 side in a state where no load is applied.

In addition, around the flange portion exposed from the lateral branch pipe connection portions 28 and 28A of the packing 31, a metal annular cover (not shown) is fitted to protect the heat treatment from heat.

Further, the body portion 20 is provided with a taper portion 33 that narrows in a tapered shape over the entire circumference on the lower end side of the inner peripheral surface 20a. Each of the lateral branch pipe connecting portions 28, 28A is arranged with the lower edge 28d aligned with the lower end 33a of the taper portion 33.

The lower connection portion 35 is provided so as to extend downward from the lower end 33a of the tapered portion 33 in a straight tube shape. The lower connecting portion 35 includes an upper end portion 36 connected to the tapered portion 33, a lower end portion 38 connected to the receiving port 5a of the leg joint 5, and an intermediate portion 37 between the upper end portion 36 and the lower end portion 38. Is configured. Further, in the case of the embodiment, the upper end portion 36 and the intermediate portion 37 are in a black skin state, but the lower end portion 38 is cut by a lathe or the like to have a stable outer diameter dimension.

And the lower connection part 35 makes the area of the lower end part 38 a cuttable area so that even if the thickness dimension of the floor slab CS changes from 120 to 250 mm, the lower end part 38 can be cut and dealt with. There is.

In the case of the embodiment, the lower end portion 38 has a length dimension L1 of 150 mm in the uncut state. The lower end portion 38 has a diameter of 113, the intermediate portion 37 has a diameter of 112, and the upper end portion 36 has a diameter of 116.

Further, in the drainage pipe joint 10 of the embodiment, the drainage stack pipe 1 and the lower connection portion 35 connected to the receiving port 15 of the upper connection portion 11 have the same nominal diameter (100 in the case of the example). The nominal diameter of the lateral branch pipe 2 connected to the lateral branch pipe connecting portions 28, 28a is 80. The outer diameter of the body 20 is 1.5 times the nominal diameter of the drainage stack 1, and the outer diameter is 150φ. Further, the taper portion 33 has a narrowing inclination angle (taper angle) θt of 45°.

The leg joint 5 to which the lower end portion 38 of the lower connecting portion 35 is connected includes a receiving port 5a into which the lower end 38a of the lower end portion 38 is inserted for connection, a body portion 5b that is bent from the receiving port 5a and laterally extends in a lateral direction, The horizontal main pipe receiving port 5c to be connected to the main pipe 3 is provided, and the holding flange 6 assembled to the horizontal main pipe receiving port 5c is provided. The holding flange 6 is configured to be connected to the horizontal main pipe receiving port 5c by using a bolt nut (not shown) with an annular packing 7 interposed between the holding flange 6 and the horizontal main pipe receiving port 5c. In the leg joint 5, the horizontal main pipe 3 is inserted into the horizontal main pipe receiving port 5c in a state where the pressing flange 6 and the packing 7 are penetrated, and the bolt 7 is tightened to compress the packing 7, The main pipe 3 is connected to the horizontal main pipe receiving port 5c so as not to come off.

The leg joint 5 is held on the floor slab SC by using a support fitting (not shown) or the like.

Then, in the drainage pipe joint 10 of the embodiment, the lower end portion 38 of the lower connection portion 35 is cut and processed in correspondence with the floor slab CS to be installed, and the through hole Sh is provided in the floor slab CS, The lower connecting portion 35 is inserted into the through hole Sh, the peripheral gap is filled with the mortar M, and the drainage pipe joint 10 is laid on the floor slab CS. Then, the drainage stack pipe 1 is inserted into and connected to the receiving port 15 of the upper connection portion 11, and the predetermined side branch pipes 2 and 2 are inserted into and connected to the side branch pipe connection portions 28 and 28A, respectively. Also, while the lower end 38a of the lower end portion 38 of the lower connecting portion 35 protruding from the floor slab CS is inserted into and connected to the receiving port 5a of the leg joint 5, the leg joint 5 is used with a support fitting (not shown). Then, the horizontal main pipe 3 is connected to the floor slab CS, etc., the horizontal main pipe 3 is inserted into the horizontal main pipe receiving port 5c, and the bolts and nuts of the holding flange 6 are tightened to connect the horizontal main pipe 3 to the leg joint 5. it can.

As shown in FIG. 6, if the floor slab CSA is thinner than the floor slab CS shown in FIG. 5, the cutting allowance CU (see FIG. 2) and lower connection are provided so that the gradient of the horizontal main pipe 3 can be more secured. The lower end portion 38 of the portion 35 may be cut into short pieces and laid on the floor slab CSA.

As described above, after the drainage pipe joint 10 in the drainage system of the embodiment is laid on the floor slabs CS and CSA, when the drainage flows down from the drainage stack pipe 1, the body arranged on the floor slabs CS and CSA. The part 20 is opposed to the body part 20 with the axis C0 of the body part 20 in between, and is vertically displaced to provide two (in particular, only two in the embodiment) swivel guides 24 and 26. Even if the nominal diameter of the lower connecting portion 35 is not increased, the drainage flowing through the leg joint 5 is given counterclockwise swirlability when viewed from above, and the air core can be arranged at the center, which is excessive. Since it is possible to prevent the generation of positive pressure and the like, the lower connection portion 35 can be configured compactly, the through holes Sh of the floor slabs CS, CSA can be made to have small diameter openings, and the leg joint 5 can be prevented from increasing in size.

Further, in the drainage pipe joint 10 of the embodiment, the lower connection portion 35 can be arranged so as to penetrate the floor slabs CS, CSA from the upper end, and the lower end 33a of the tapered portion 33 at the lower end of the body portion 20. Is formed so as to extend downward in the form of a straight tube, the length thereof can be adjusted, and the lower end 38a side can be cut, so that the floor slabs CS, CSA can be penetrated and the receiving port 5a of the leg joint 5 is formed. If the length dimension to be connected to the floor slab can be secured, the lower end 38a side can be cut short without any restriction. Therefore, the leg joint 5 can be easily placed close to the ceiling surfaces of the floor slabs CS and CSA, which is excellent. The drainage gradient of the horizontal main pipe 3 can be secured.

Further, in the drainage pipe joint 10 of the embodiment, the upper connection portion 11, the body portion 20, and the lower connection portion 35 are integrally formed without using bolts or nuts, and each portion is mutually connected. Since there is no flange portion to be connected, it is not bulky, and the work of connecting using a bolt or the like is unnecessary, which is convenient for handling.

Furthermore, in the drainage pipe joint 10 of the embodiment, the lateral branch pipe connecting portions 28, 28A for connecting the lateral branch pipe 2 are arranged at the height position of the lower swivel guide 26 in the body portion 20, and The lateral branch pipe connecting portion 28 is provided on the lower end 24g side of the upper turning guide 24 and in the lower turning guide 26 in the direction orthogonal to the facing direction of the upper and lower turning guides 24, 26 about the axis C0 of the body portion 20. The lateral branch pipe connecting portion 28A is arranged at a position closer to the upper end portion 26f side, and is arranged at a position facing the lower swivel guide 26 about the axis C0 of the body portion 20.

Therefore, in the drainage pipe joint 10 of the embodiment, even if the body portion 20 is provided with the two horizontal branch pipe connection portions 28 and 28A, the drainage flowing down from the drainage stack pipe 1 flows back to the horizontal branch pipes 2 and 2. Can be stably prevented, and the drainage from the two lateral branch pipes 2, 2 can be collected to smoothly flow down.

Therefore, in the drainage system of the embodiment, even if the drainage pipe joint 10 is connected to the leg joint 5 by penetrating the floor slabs CS and CSA of the lowest layer, good drainage performance is ensured and the drainage pipe joint 10 is secured. Rutotomoni can configure the lower connection portion 35 of the compact, it is possible to suppress upsizing of the leg joint 5, also, the handling of the drainage pipe joint 10 also becomes convenient, perform the installation work on site efficiently.

In addition, although the drainage pipe joint 10 of the embodiment is made of metal by casting, the upper connection portion 11, the body portion 20, and the lower connection portion 35 are integrally connected, but polychlorinated. The drain pipe joint may be formed from a resin such as vinyl. When the drain pipe joint is made of resin, predetermined portions may be bonded to each other to be integrally connected. Even in the drainage pipe joint having such a configuration, there is no flange portion for connecting the respective parts, it is not bulky, and the work of connecting it by using a bolt or the like is unnecessary, which is convenient for handling. By the way, when the drain pipe joint made of resin is composed of a divided body, for example, the portion of the upper connection portion 11 and the portion of the body portion 20 can be divided, and these may be adhered to each other. .. In addition, when the drain pipe joint is made of resin, it is desirable to cover the outer surface with a cover material having fire resistance.

Further, in the drainage pipe joint 10 of the embodiment, the lateral branch pipe connecting portion 28A of the opposite portion of the swivel guide 26 about the axis C0 of the body portion 20 and the up-and-down swivel about the axis center C0 of the body portion 20. The lower branch portion 24g side of the upper turning guide 24 and the lateral branch pipe connecting portion 28 on the side closer to the upper end portion 26f side of the lower turning guide 26 in the direction orthogonal to the guides 24, 26 are arranged. The one shown is shown. However, like the drainage pipe joint 10B shown in FIGS. 7 to 9, it is orthogonal to the facing direction of the upper and lower swivel guides 24, 26 about the axis C0 of the body portion 20 and faces the lateral branch pipe connecting portion 28. The horizontal branch pipe connecting portion 28B capable of connecting the horizontal branch pipe 2 may be disposed at the position.

Even in such a configuration, the lower turning guide 26 is arranged at three positions deviated by 90° around the axis C0 of the body portion 20, and the lateral branch pipe connecting portions 28 thereof are arranged. , 28A, 28B are arranged so that the drainage flowing down from the drainage stack 1 can be prevented from flowing back to the lateral branch pipes 2 connected to the respective lateral branch pipe connection portions 28, 28A, 28B. As a result, it is easy to prevent backflow to the lowermost lateral branch pipes 2, 2, 2 and to allow the drainage from the lowermost lateral branch pipes 2, 2, 2 to smoothly flow down to the leg joint 5. Is possible.

The drainage pipe joint 10B is configured so as to more stably prevent backflow to the side branch pipe connection portions 28, 28B. That is, on the side of the lateral branch pipe connecting portion 28, the lateral branch pipe connecting portion 28 near the lower end 24g of the turning guide 24 is provided on the inner peripheral surface 20a side of the body portion 20 so that the drainage guided by the turning guide 24 does not flow in. A backflow prevention wall which is provided with an eaves-shaped water collecting guide 40 whose upper surface center is recessed along the axis C1 at the upper edge 28c and which vertically covers the opening edge of the lateral branch pipe connecting portion 28 on the swivel guide 24 side. 41 is provided. Further, on the side of the lateral branch pipe connecting portion 28B, the opening edge on the lower end 26g side of the turning guide 26 is vertically covered on the inner peripheral surface 20a side of the body portion 20 so that the drainage guided by the turning guide 26 does not flow in. Thus, the backflow prevention wall 41 is provided. Incidentally, such a water collecting guide 40 and the backflow preventing wall 41 may be provided also in the drainage pipe joint 10 as shown by a two-dot chain line in FIGS.

Of course, in the drainage pipe joint in the drainage system of the present invention, any one or two of the lateral branch pipe connection portions 28, 28A, 28B may be arranged.

Further, in the drainage pipe joint 10 in the drainage system of the embodiment, the receiving port 15 of the upper connecting portion 11 is configured to be connected to the drainage stack pipe 1 having the same nominal diameter as the lower connecting portion 35. ..

Therefore, in the drainage pipe joint 10 of the embodiment, since the nominal diameters of the upper connection portion 11 and the lower connection portion 35 can be the same, the upper drainage stack pipe and the lower drainage pipe having the floor slab therebetween are not limited to the lowermost layer. It can be used as a drainage pipe joint configured to connect to a vertical pipe. In addition, since the lower connecting portion 35 extends downwardly from directly below the body portion 20 in a straight tubular shape, at the time of repair, the straight through hole of the floor slab that is the trace of the existing drainage pipe joint is pulled out as much as possible, Since the lower connecting portion 35 of the drainage pipe joint 10 according to the embodiment can be inserted and repaired without shaving (shaving the minimum clearance), the drainage stack 1 can be easily updated. Can contribute.

1... Drainage stack pipe, 2... Horizontal branch pipe, 3... Horizontal main pipe, 5... Leg joint, 5a... (Leg joint) receiving port,
10, 10B... Drainage pipe joint, 11... Upper connection part, 15... (Upper connection part) receptacle, 20... Body part, 24... (Upper) swivel guide, 24g... (Upper swivel guide) lower end, 26... (Lower side) swivel guide, 26f... upper end portion (of lower swivel guide), 28, 28A, 28B... lateral branch pipe connecting portion, 33... taper portion, 33a... lower end, 35... lower connecting portion, 38a... lower end,
C0... (body part) axis center, C1... (lateral branch pipe connection part) axis center, CS, CSA... floor slab, Sh... through hole.

Claims (3)

A leg joint connected to the horizontal main pipe, and a floor pipe slab of the lowest layer are passed through, and a drain pipe joint configured to connect the drain joint and the lateral branch pipe while being connected to the leg joint. Drainage system
The drain pipe joint,
An upper connection portion that is disposed on the upper side and has a receiving port that can be connected to the lower end portion of the drainage stack pipe,
A lower connecting portion that is arranged on the lower side and that can be connected to the receiving port of the upper end of the leg joint,
A body portion having a lateral branch pipe connecting portion that is disposed between the upper connecting portion and the lower connecting portion and that can connect the horizontal branch pipe,
Is configured with
The body is
The diameter is expanded from the receiving port of the upper connecting portion, and is composed of two upper and lower areas of an upper portion on the upper side and a lower portion on the lower side,
It is provided with two swivel guides that give swirlability to the drainage flowing down from the drainage stack in a counterclockwise direction when viewed from above, and the two swivel guides face each other with the axis of the body part in between, and The upper side portion and the lower side portion which are vertically displaced are arranged to be arranged,
As a configuration in which the lateral branch pipe connection portion is not disposed on the upper portion of the trunk portion but is disposed only on the lower portion of the trunk portion, the height of the turning guide on the lower side of the trunk portion is set. Is located at a position orthogonal to the facing direction of the upper and lower swivel guides about the axis of the body, or faces the lower swivel guide about the axis of the body. Position, either of the configuration,
The lower connecting portion is arranged so as to be capable of penetrating the floor slab from the upper end, and is formed so as to extend downward in a straight tubular shape from the lower end of the tapered portion of the lower constriction of the lower end of the body portion, and Adjustable, the bottom end can be cut,
The drainage system, wherein the upper connection portion, the body portion, and the lower connection portion of the drainage pipe joint are integrally formed without using a bolt or a nut. The receiving port of the upper connection portion of the drainage pipe joint is configured to be connected to the drainage vertical pipe having a nominal diameter that is the same as the nominal diameter of the lower connection portion. Drainage system described. The horizontal branch pipe connection portion of the drain pipe joint, the lower end side of the upper swivel guide and the lower swivel guide in the direction orthogonal to the facing direction of the upper and lower swivel guides around the axis of the body It arrange|positions at the position of the side which approaches the upper end side, and the position which opposes the said lower rotation guide centering|focusing on the axial center of the said trunk|drum, It is characterized by the above-mentioned. Drainage system described.

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