JP2003013475A - Drainpipe joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drainpipe joint which can prevent backflow to the lateral connecting part side and can give whirling properties to drainage from above and further which enables shortening of the axial length of a body part. SOLUTION: The drainpipe joint 10 has the almost cylindrical body part 11 provided with an upper connecting part 21 and a lower connecting part 22 being connectable with vertical pipes 1 and 2 respectively, and the body part 11 is provided with a lateral connecting part 24 with which piping 4 other than the vertical pipes 1 and 2 can be connected. At the upper edge 14a of a communication opening 14 opened on the inner peripheral surface 12 side of the body part and communicating with the lateral connecting part 24, a backflow preventing eaves part 15 preventing inflow of the drainage W into the lateral connecting part 24 is provided in projection to the axis C side of the body part. A whirl guide 13 capable of giving the whirling properties to the drainage W flowing down from above is provided in an area from the vicinity of the upper edge 14a of the communication opening to just before the lower connecting part 22 inside the inner peripheral surface 12 of the body part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage pipe joint interposed between upper and lower drainage stacks in a multi-storey building, and more particularly to a drainage pipe joint which is vertically compact.

[0002]

2. Description of the Related Art A drainage pipe joint of this type is provided with a substantially cylindrical body portion having upper and lower connecting portions, which are respectively connectable to upper and lower drainage stacks, at upper and lower ends thereof. A lateral connection part to which a lateral branch pipe or the like can be connected is disposed in the section.

Further, in this type of drainage pipe joint, Japanese Patent Laid-Open No.
As described in 001-26956, backflow is performed so that the drainage flowing from above does not flow into the lateral branch pipe side at the upper edge side of the communication opening that communicates with the lateral connection portion on the inner peripheral surface side of the body portion. The prevention eaves portion is formed, and the eaves portion is further provided with the turning guide inclined surface so that the drainage flowing down from above can be decelerated to give the turning ability.

[0004]

However, in such a drainage pipe joint, since the swivel guide inclined surface is disposed on the eaves portion itself, the eaves portion itself becomes large, and as a result, the upper and lower portions of the body portion are increased and decreased. There is room for improvement in making the drain pipe joint compact by increasing the length in the direction.

In a straight pipe joint type drainage pipe joint in which pipes are pushed and connected as in Japanese Patent Laid-Open No. 2001-11917, a swivel guide is provided on the inner peripheral surface of the lower connecting portion to measure the length of the body portion. Is considered to be as short as possible.
However, in the configuration as described in the above publication, the lower connecting portion has a narrower inner diameter than the body portion, and dust such as toilet paper is caught in the swivel guide arranged on the narrowed inner peripheral surface. This is not preferable and cannot be adopted because the oil and fat content easily adheres and the effective opening area of the piping structure is narrowed.

The present invention is intended to solve the above-mentioned problems, and it is possible to impart swirlability to drainage from above while ensuring backflow prevention to the side of the lateral connection portion, and further, to increase the axial length of the body portion. An object of the present invention is to provide a drainage pipe joint that can be reduced in length.

[0007]

DISCLOSURE OF THE INVENTION A drainage pipe joint according to the present invention comprises a substantially cylindrical body portion having upper and lower connecting portions, which are respectively connectable to a drainage stack, at upper and lower ends. Along with the body part, a drainage pipe joint configured by arranging a horizontal connection part capable of connecting a pipe other than the vertical pipe,
At the upper edge of the communication opening that communicates with the lateral connection portion on the inner peripheral surface side of the body portion, the drainage that is arranged in a direction substantially orthogonal to the axis of the body portion and flows down from above flows into the lateral connection portion. The backflow prevention eaves portion for preventing the above is disposed so as to project to the axial center side of the body portion, and from the vicinity of the upper edge of the communication opening on the inner peripheral surface of the body portion to immediately before the lower connection portion. It is characterized in that a swirl guide capable of imparting swirlability to the drainage flowing down from above is arranged in the region.

In the backflow prevention eaves, a water collecting portion for collecting and flowing down drainage from above is disposed above the center of the communication opening as viewed from the axial center side of the body. Is desirable.

The water collecting portion is located near the center of the communication opening at the protruding end toward the axial center of the body as viewed from above the backflow preventing eaves, and the protruding end is located on the inner peripheral surface side of the body. It can be configured by providing an end surface side concave portion that is made to approach, or by providing an upper surface side concave portion that is recessed downward above the center of the communication opening on the upper surface side of the backflow prevention eaves portion.

Further, it is desirable that a boss portion, to which an auxiliary pipe can be connected, is provided on the body portion by a hole forming process.

Further, it is desirable that the boss portion is arranged so as to extend upward from the body portion.

[0012]

In the drainage pipe joint according to the present invention, the backflow preventing eaves portion is formed at the upper edge of the communication opening communicating with the lateral connecting portion on the inner peripheral surface of the body portion, and the drainage flowing down is prevented from backflowing. It interferes with the eaves and is prevented from flowing into the side of the lateral connection.
Further, since the swivel guide is disposed on the inner peripheral surface of the body, the drainage flowing down interferes with the swivel guide and is given swirlability.

Further, the backflow preventing eaves portion is arranged in a direction substantially orthogonal to the axis of the body portion, and the arrangement space along the axial direction of the body portion can be made as small as possible. Therefore, even if the lateral connection portion is arranged so as to approach the upper connection portion of the body portion, the backflow prevention eaves portion can be easily arranged at the upper edge of the communication opening of the inner peripheral surface of the body portion. As compared with the conventional drain pipe joint, the axial length of the body can be shortened by the amount that the lateral connection can be brought closer to the upper connection.

Therefore, in the drainage pipe joint according to the present invention, swirlability can be imparted to the drainage water from above while the backflow to the side of the lateral connection portion is ensured, and the axial length of the body portion can be shortened. And can be made compact.

Further, in the drainage pipe joint according to the present invention, since the swivel guide can be arranged near the same level as the communication opening of the lateral connecting portion, the lower connecting portion is arranged close to the lateral connecting portion. It is also possible to do. That is, even if the distance from the horizontal connecting portion to the lower connecting portion is shortened, the lower connecting portion is brought close to the horizontal connecting portion while ensuring the backflow prevention to the horizontal connecting portion side and the swirling property imparted to the drainage. As a result, the axial length of the body portion can be shortened by the amount that the drainage pipe joint can be brought closer to the drainage pipe joint, and the drainage pipe joint can be made more compact.

Further, as described in claim 2, the backflow preventing eaves portion collects the drainage from above and flows it down above the center of the communication opening as seen from the axial center side of the body. If the drainage that flows down interferes with the backflow prevention eaves from above if it is equipped with a section, it will flow down from above near the center of the communication opening in the eaves, making it difficult to flow down from the left and right sides of the eaves. . That is, since a space portion communicating with the lateral connection portion is secured in the portion of the communication openings below the left and right sides of the eaves portion, a water seal in a drain trap of, for example, a lateral branch pipe connected to the lateral connection portion is secured. Do not break If drainage flows from the drainage device connected to the horizontal branch pipe when the communication opening is blocked by the drainage flowing down from the vertical pipe side, the drainage trap of the horizontal branch pipe will be sealed. It flows to the lower connection part side with the drainage from and is easily torn. If the sealing water of the drain trap is broken, the odor on the side of the vertical pipe will flow to the inside of the room, which is not preferable.

Such a water collecting portion is defined by claim 3 or claim 4.
As described above, the backflow prevention eaves portion can be configured by providing the end surface side recessed portion or the upper surface side recessed portion, without easily increasing the arrangement space of the eaves portion along the axial direction of the body portion, easily,
It can be provided.

Further, as described in claim 5, when the boss portion to which the auxiliary pipe can be connected is provided in the body portion by the hole forming processing, the boss portion is subjected to the hole forming processing. , It becomes possible to easily connect the auxiliary pipe for flowing the drainage from the hand washing device to the drain pipe joint. Then, the function of collecting a small amount of drainage can be easily added to the drainage pipe joint that is compact in the axial direction.

In this case, as described in claim 6, if the boss portion is formed so as to extend upward from the body portion, gravity is exerted on the drainage flowing down from the vertical pipe so that the boss portion is formed. It is possible to prevent backflow to the side of the auxiliary pipe connected to.

The structure of the backflow prevention eaves according to any one of claims 2 to 4 is not limited to the swivel guide according to claim 1, or is not limited to a compact drainage pipe joint. Furthermore, the upper edge of the communication opening that communicates with the horizontal connection portion to be connected to the lateral branch pipe is not limited to the one provided, for example, the body portion, the horizontal connection portion for connecting the ventilation pipe,
Even when a protruding portion such as a cleaning cylinder portion having a cleaning port opened on the protruding end side is provided, on the upper edge side of the communication opening that opens to the inner peripheral surface side of the body portion that communicates with the protruding portion, They may be provided, and in those cases, it is possible to obtain the effect of ensuring the ventilation performance of the ventilation pipe in addition to preventing breakage of the sealing water in the drain trap.

Further, the structure of the boss portion described in claims 5 and 6 is also provided with the swivel guide described in claim 1,
Alternatively, the drainage fitting is not limited to a compact size, and the drainage fitting may be a normal drainage fitting.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 to 3, the drainage pipe joint 10 of the embodiment is of a flexible joint type for drainage steel pipes, and has upper connection portions 2 which can be connected to the drainage stack pipes 1 and 2, respectively.
1 and a lower connecting portion 22 are arranged at the upper and lower ends, and a substantially cylindrical body portion 11 is provided. The upper connection portion 21 and the lower connection portion 22 are stepped stopper portions 21a and 22 for respectively inserting and stopping the upper stand pipe 1 and the lower stand pipe 2.
a, vertical pipes 1 and 2, and flange portions 21b and 22b capable of fixing bolts and nuts.

Further, a lateral connecting portion 2 to which a lateral branch pipe 4 whose axis intersects the body 11 at right angles can be connected to the body 11.
4 is formed, and the lateral connection portion 24 is configured to include a stepped stopper portion 24a for inserting and stopping the lateral branch pipe 4, and the lateral branch pipe 4 and a flange portion 24b capable of fixing bolts and nuts. ing.

On the inner peripheral surface 12 of the body 11, the turning guide 1
3, a communication opening 14 that communicates with the lateral connection portion 24, and a backflow prevention eaves portion 15 are provided.

The swivel guide 13 imparts a swivel property to the drainage W flowing down from above, which rotates counterclockwise when viewed from above. In the case of the embodiment, the swivel guide 13 has the body portion axis C
And the inner peripheral surface 12 of the body portion 12 while being inclined so as to intersect with each other at about 45 ° and arranged at a position deviated from the communication opening 14 by 90 ° when viewed from the axial center C side of the body portion 11. Are arranged in a small range of about 1/2 of the inner diameter of the body 11 along the circumferential direction. Furthermore, the upper end 13a of the swivel guide 13 is separated from the backflow prevention eaves portion 15 and is positioned slightly below the upper edge 14a of the communication opening 14, and the lower end 13a.
b is located near the lower edge 14b of the communication opening 14. In the embodiment, the swivel guide 13 is formed integrally with the body portion 11 and has a vertical cross section of a V shape, but it is a flat plate having only the upper surface 13c side, and is formed as the body portion 11. Formed integrally, or the swivel guide 13
May be formed as a separate body and fixed to the body portion 11 by welding or the like.

Further, the backflow prevention eaves portion 15 prevents the drainage W flowing down from above from flowing into the lateral connection portion 24 side, and the body inner peripheral surface 1 on the upper edge 14a side of the communication opening 14 is provided.
2 is provided so as to project from the body axial center C side. The eaves portion 15 has a substantially crescent-shaped plate shape and is arranged in a direction orthogonal to the axis C of the body portion 11, and the communication opening 1 is formed.
4 is arranged so as to cover the upper part of the entire area. And
As shown in FIG. 5, when the drainage W flowing from above interferes, the eaves portion 15 collects the drainage W on the center 15c side of the upper surface 15b rather than on the left and right edges 15d and 15e, and the communication opening is formed. A water collecting portion 16 for allowing the water to flow downward near the center 14c of 14 is provided. The water collecting section 16 is
In the case of the embodiment, the end surface side water collecting concave portion 17 and the upper surface side water collecting concave portion 18 are provided.

In the end face side water collecting concave portion 17, a projecting end 15a toward the trunk body axial center C when viewed from above the eaves portion 15 has a communication opening 1.
4, the inner peripheral surface 1 of the protruding body portion is located above the center 14c.
It is formed so as to be recessed so as to approach the second side. The water collecting recess 17 is provided with a groove 17a that is most recessed above the center 14c of the opening centering on the body center axis C.
It is configured. That is, in the end surface side water collecting concave portion 17, the portion of the concave groove 17a in the eaves portion 15 is cut away from the inner peripheral surface 12 of the body portion about the body portion axis C as compared with the surrounding portion. It is configured so that it is small.

It should be noted that the eaves portion 15 is arranged so that the projecting end 15a linearly crosses the body inner peripheral surface 12 when viewed from above, or the eaves portion 15 has the body portion axial center C. The end face side water collecting recesses 17 are not formed in the case where the end face side water collecting recesses 17 are arranged in an annular shape so that the distance from the body inner peripheral surface 12 to the projecting end 15a is constant around the center.

The upper surface side water collecting concave portion 18 is the upper surface 1 of the eaves portion 15.
A groove 18a recessed downward from the left and right edges 15d and 15e, above the center 14c of the communication opening 14 on the 5b side.
And the groove 1 from both left and right edges 15d and 15e side.
It is configured by providing inclined surfaces 18b and 18c that descend to the 8a side.

In the case of the embodiment, the eaves portion 15 is also
Like the swivel guide 13, it is formed integrally with the body 11, but it may be formed separately from the body 11 and fixed to the body 11 by welding or the like.

Further, the drainage pipe joint 10 of the embodiment includes
A boss portion 26 having a substantially cylindrical shape that can be provided with an auxiliary pipe 32 by drilling until completion of on-site installation after casting.
Is formed. The auxiliary pipe 32 has a diameter smaller than that of the lateral branch pipe 4, and examples thereof include a pipe extending from the hand washing device. In the case of the embodiment, the inner diameter of the lateral branch pipe 4 is about 80φ, and the inner diameter of the auxiliary pipe 32 is about 30φ-40φ. Each boss portion 26 is formed on the body inner peripheral surface 12 side so as to open the connection opening 20 and extend upward. In the case of the embodiment, the intersection angle α of the axis C1 of the boss portion 26 with respect to the body axis C is 45 °. The end of the boss portion 26 extending obliquely upward is closed before the boring process (the boss portion 2 in FIG. 2).
6L), the inner peripheral surface of the opening 28 opened after drilling is provided with a female screw 29 into which a cap 30 used when closing the opening 28 can be screwed, if desired (FIG. 2).
Boss portion 26R).

In the drainage pipe joint 10 of this embodiment, at the time of construction, for example, above the slab S, the upper and lower connecting portions 21.2 are connected.
The upper and lower vertical pipes 1 and 2 are connected to 2, and the horizontal branch pipe 4 connected to the toilet is connected to the horizontal connection portion 24.
In addition, in the end side opening 28 of the boss portion 26 that is perforated,
The auxiliary pipe 32 extending from the hand washing device and guiding the drainage from the hand washing device to the drain pipe joint 10 is connected and used.

In the drainage pipe joint 10 of this embodiment, the backflow prevention eaves portion 15 is formed at the upper edge 14a of the communication opening 14 that communicates with the lateral connection portion 24 on the inner peripheral surface 12 of the body portion during use. The drainage W that flows down interferes with the backflow prevention eaves portion 15 and is prevented from flowing into the lateral connection portion 24 side. Also,
Since the swivel guide 13 is disposed on the inner peripheral surface 12 of the body, the drainage W flowing down interferes with the swivel guide 13,
A turning property is given.

The backflow prevention eaves portion 15 is disposed in a direction substantially orthogonal to the axis C of the body portion 11, and the body portion 1
The arrangement space along the axial direction of 1 can be made as small as possible. Therefore, even if the lateral connection portion 24 is arranged so as to approach the upper connection portion 21 of the body portion 11, the backflow prevention eaves portion 1 is provided at the upper edge 14a of the communication opening 14 of the inner circumferential surface 12 of the body portion.
5 can be easily arranged, and the lateral connecting portion 24 can be brought closer to the upper connecting portion 21 as compared with the drain pipe joint having the conventional configuration, so that the axial length of the body portion 11 can be increased. The size can be shortened.

Therefore, in the drainage pipe joint 10 of the embodiment, it is possible to impart swirlability to the drainage W from above while ensuring the backflow prevention to the side of the lateral connection portion 24.
The axial length of can be shortened and the device can be made compact.

When the flexible joint type drainage pipe joint 10 of the embodiment is used, since the swivel guide 13 is disposed on the inner peripheral surface 12 of the body portion 11, a large amount of drained water W flows down. Even so, the air core can be reliably secured in the vicinity of the axis of the piping structure configured by arranging the vertical pipes 1 and 2. As a result, in the flexible joint type, without considering the increase in the inner diameter dimension of the stand pipes 1 and 2 which has been frequently used in the related art, that is, without increasing the size of the stand pipes 1 and 2, the embodiment In the piping structure using the drainage pipe joint 10, the air permeability can be ensured.

Further, in the drainage pipe joint 10 of the embodiment,
The swivel guide 13 is arranged in the vicinity of the same level as the communication opening 14 of the horizontal connecting portion 24, and the lower connecting portion 22 is connected to the horizontal connecting portion 24.
It is placed close to. That is, the horizontal connection portion 24
From the lower connection 22 to the horizontal connection 24
The lower connection portion 22 is brought close to the horizontal connection portion 24 in a state where the backflow prevention to the side and the swirlability imparted to the drainage W are secured.
The length dimension in the axial direction of the body portion 11 can be shortened by the amount of the approach, and the drainage pipe joint 10 can be
It is possible to make it even more compact.

If the above points are not taken into consideration, the body 1
The lower part of the body 1 is lengthened in the vertical direction, and the lower part of the body part 11 is appropriately provided with a taper part that narrows downward. You may comprise a joint.

Further, in the case where the amount of protrusion of the turning guide 13 toward the axial center C of the trunk portion becomes large, the inner diameter of the trunk portion 11 itself may be increased to improve the ventilation performance.

Further, in the drainage pipe joint 10 of the embodiment, the backflow prevention eaves portion 15 is disposed above the drainage W above the center 14c of the communication opening 14 viewed from the axial center C side of the body portion 11. A water collecting portion 16 for collecting and flowing down the water is provided.
Therefore, the drainage water W flowing down from the upper side is the backflow prevention eaves portion 15 from above.
When it interferes with, as shown in FIG. 5, it flows down from above the center 14c of the communication opening 14 in the eaves portion 15 and becomes difficult to flow down from the left and right edges 15d and 15e of the eaves portion 15. That is, the lateral connection portion 24 is provided at the portion of the communication opening 14 below the left and right edges 15d and 15e of the eaves portion 15.
Since the space portion A communicating with the side is secured, the sealing water in the drain trap of the lateral branch pipe 4 connected to the lateral connection portion 24 is not broken.

By the way, if drainage flows from the toilet connected to the lateral branch pipe 4 with the communication opening 14 blocked by the drainage W flowing down from the side of the vertical pipe 1, the drain trap of the lateral branch pipe 4 will be described. The water for sealing flows into the lower connecting portion 22 side together with the drainage from the toilet bowl and is easily broken. If the sealing water of the drain trap is broken, the odor on the side of the vertical pipes 1 and 2 flows to the inside of the room, which is not preferable.

Further, in the backflow prevention eaves portion 15, two kinds of recesses 1 are simply provided on the protruding end 15a side and the upper surface 15b side.
7 and 18 are provided to form the water collecting portion 16, so that the eaves portion 15 can be easily attached to the body portion 11 without increasing the space for disposing the eaves portion 15 along the axial direction of the body portion 11. Can be installed at

Further, in the drainage pipe joint 10 of the embodiment,
A boss portion 26 to which the auxiliary pipe 32 can be connected is provided in the body portion 11 by drilling. The boss portion 26 is drilled so that the drainage pipe joint 10 can be easily washed by hand. An auxiliary pipe 32 for flowing the drainage from the vessel or the like can be connected. Then, the function of collecting a small amount of drainage can be easily added to the drainage pipe joint 10 that is compact in the axial direction.

In particular, the boss portion 26 of the embodiment is the body portion 11
Is formed to extend upward from. Therefore, the vertical pipe 1
Even if the drainage W flowing down from the rises up the inner peripheral surface 27 of the boss portion 26 and tries to flow back to the side of the auxiliary pipe 24 connected to the boss portion 26, gravity acts, so that the auxiliary pipe of the drainage W. Backflow to the 32 side can be effectively prevented.

In the embodiment, the case where two types of the end face side water collecting concave portion 17 and the upper surface side water collecting concave portion 18 are provided as the water collecting portion 16 provided in the backflow preventing eaves portion 15 has been shown. 6
8 to 8, the backflow prevention eaves portion 15A is provided with only the end surface side water collecting recesses 17, or the backflow prevention eaves portion 15B is provided with only the upper surface side water collecting recesses 18 as shown in FIGS. May be.

As a matter of course, as the backflow preventing eaves portion 15, one having no water collecting portion 16 may be used as long as there is no obstacle on the side of the lateral branch pipe 4. For example, you may comprise like the backflow prevention eaves part 15C shown in FIGS. 12-14, and the backflow prevention eaves part 15D shown in FIGS.

Backflow prevention eaves portion 15C shown in FIGS.
Is a substantially crescent-shaped plate, and has an inner peripheral surface 12 of the body portion 11.
Is arranged so as to project from the upper edge 14a of the communication opening 14 that communicates with the lateral connection portion 24 on the side toward the trunk axis C side, and is arranged in the direction orthogonal to the axis C of the trunk portion 11. Has been done. Even in such a backflow prevention eaves portion 15C, if the drainage W flowing down from above interferes with the eaves portion 15C, the drainage W will be made to flow down at a position away from the communication opening 14, and the lateral connection portion. It is possible to prevent backflow of drainage to the 24 side.

Backflow prevention eaves portion 15D shown in FIGS.
Is a substantially crescent-shaped plate, and has an inner peripheral surface 12 of the body portion 11.
Is arranged so as to project from the upper edge 14a of the communication opening 14 that communicates with the lateral connection portion 24 on the side toward the trunk axis C side, and is substantially orthogonal to the axis C of the trunk portion 11. It is arranged. It should be noted that the eaves portion 15D has an upper surface 15b side that is closer to the right edge 1 than the left edge 15d so that the drainage water W from above can be decelerated and a slight swirl can be imparted when viewed from the body axis C side.
5e is arranged above. Even in such a backflow prevention eaves portion 15D, the drainage W flowing down from above is eaves portion 15D.
If it interferes with, the drainage W will be made to flow down at the position away from the communication opening 14, and it is possible to prevent the drainage W from flowing back to the lateral connection portion 24 side.

Further, in the embodiment, as the boss portion 26,
Although the one configured to extend upward from the body portion 11 is illustrated, if the end side opening 28 formed by drilling is arranged above the connection opening 20 of the body inner peripheral surface 12,
It may be formed so as to extend substantially horizontally from the connection opening 20 and extend upward.

Further, if there is no risk that the drainage W will flow backward to the side of the auxiliary pipe 32 connected to the boss portion 26, like the boss portions 26A and 26B shown in FIG. The intersection angle α with and may be approximately 90 °.

Regarding the core for casting on the inner peripheral surface 12 side of the body portion of the casting die used for casting the drainage pipe joint 10, the eaves portion 15 of the embodiment is constructed even if the tilting guide 13 can be cast. In each joint 10 having the eaves portions 15A, 15B, and 15C of the modified example, as shown in FIGS. 3, 4, 7, 10, and 12, the divided surfaces PL passing through the eaves center 15c, It can be divided into two, the molding of the core can be easily performed, and the casting cost of the joint 10 can be reduced.

Of course, in this case, the boss portions 26, 26L,
26R, 26A, and 26B are also configured without the undercut portion so that they can be easily cast on the split surface PL.

Further, in the backflow prevention eaves portion 15 provided with the water collecting portion 16 of the embodiment, the swivel guide 13 is provided as in the embodiment.
Not being limited to the drainage pipe joint 10 having a compact structure, or disposed at the upper edge 14a of the communication opening 14 that communicates with the lateral connection portion 24 to be connected to the lateral branch pipe 4. Not only those that are provided, but also in the case where a protruding part such as a connecting part for connecting a ventilation pipe or a cleaning cylinder part having a cleaning port opened on the protruding end side is provided in the protruding part, The eaves portion 15 may be arranged on the upper edge side of the communication opening that opens to the inner peripheral surface side of the body portion that communicates.

For example, the drainage pipe joint 4 shown in FIGS.
0, the drainage pipe joint 60 shown in FIGS.
The backflow prevention eaves portion 15 may be provided in the drainage pipe joint 70 and the like shown at 26.

In the drainage pipe joint 40 shown in FIGS.
A protruding portion 23 (23B) as a cleaning cylinder portion 46 extending obliquely upward and a lateral connection portion 24A for the lateral branch pipe 4 are provided on the body portion 11.
And a projecting portion 23A. Then, the backflow prevention eaves portion is provided at the upper edges 44a and 14a of the communication opening 44 of the cleaning tubular portion 46 on the body inner peripheral surface 12 side and the communication opening 14 of the lateral connection portion 24A on the body inner peripheral surface 12 side, respectively. 15 are provided.

In this drainage pipe joint 40, the lid 50 attached to the mounting seat 49 is removed by using bolts and nuts, etc., and the end side opening 48 of the cleaning tubular portion 44 is opened, and then the standing portion is opened. A cleaning nozzle for cleaning the pipes 1 and 2 and the lateral branch pipes 4 is inserted to clean the pipes. The attachment seat 49 is detachably attached to the lid 50 by using three sets of bolts and nuts, as in the flexible joint type connection structure.
Further, in the drainage pipe joint 40, even if the drainage W flows down from the vertical pipe 1 side during cleaning, the cleaning cylinder portion 44 extends upward, and therefore, due to the action of gravity during the ascent of the inner peripheral surface 47. It does not fall and the drainage W does not leak from the end side opening 48. Further, since the backflow prevention eaves portion 15 is provided at the upper edge of the communication opening 44, it is more difficult for the backflow prevention eaves portion 15 to flow into the cleaning cylinder portion 44 side, and the drainage W from the end side opening 48 during the cleaning operation is further reduced. Leakage can be prevented.

Of course, in this drainage pipe joint 40, since the backflow preventing eaves portion 15 is also formed at the upper edge 14a of the communication opening 14 of the lateral connecting portion 24A, the lateral branch pipe 4 is also provided as in the embodiment. Prevention of backflow of the drainage W to the side and prevention of breakage of sealing water in the drainage trap of the lateral branch pipe 4 connected to the lateral connection portion 24A can be ensured.

Further, in the drain pipe joint 40,
It is also possible to insert a telescopic camera for inspection and repair of the stand pipe 1 or the like from the cleaning cylinder portion 46, or to insert a full water test ball during a full water test. Furthermore, the ventilation pipe may be connected to the cleaning cylinder portion 46 by using the mounting seat 49.

The drainage pipe joint 60 shown in FIGS. 22 to 24 has two horizontal connecting portions (projecting portions) 66 and 68 that intersect in the orthogonal direction.
The vertical pipes 1A and 2A and the lateral branch pipes 4A and 4B to be connected to the upper connection portion 2
It is a straight pipe joint type that can be connected simply by pushing it into the 1A / 22A or the lateral connecting portions 66/68. Each horizontal connection 66
68 is a stopper 66a, 68a and a sealing material 66b
-68b is arranged and configured. Further, the communication opening 6 on the side of the inner peripheral surface 12 of the body portion that communicates with the lateral connection portion 66
4, a swivel guide 63 is disposed above the upper edge 64a side, and a backflow prevention eaves portion 15 is disposed on an upper edge 14a of the communication opening 14 of the body inner peripheral surface 12 that communicates with the lateral connection portion 68. It is set up.

The swivel guide 63 functions as an eaves portion for preventing the backflow of the drainage W into the communication opening 64, and is capable of imparting swirlability to the drainage W. The upper surface on the side is tilted to the lower left side as a turning guide inclined surface 63a having a large area, and is tilted downward to the side of the body axis C, and the upper surface from the side of the body axis C to the right is The lower right inclined surface 63b having a small area is inclined to the lower right side and is inclined downward to the body axis C side.

When viewed from the body axis C side, the communication opening 14 of the lateral connecting portion 68 is opened in the extension direction of the turning guide inclined surface 63a in the lower left direction of the turning guide 63, but the opening upper edge is formed. Since the backflow prevention eaves portion 15 is disposed in the 14a, even if the drainage W guided by the turning guide inclined surface 63a flows down, it is possible to prevent the backflow to the lateral connection portion 68 side.

In the drainage pipe joint 60, the horizontal connecting portion 68 is arranged on the left side of the body portion 11 in FIG. 22, but the horizontal connecting portion 68 is shown in FIG. You may arrange | position on the right side, ie, the extension direction side of the lower right inclined surface 63b.

In the drainage pipe joint 70 shown in FIGS.
The horizontal connecting portions 66 and 68 of FIGS. 22 to 24 are arranged to face each other along the diametrical direction of the body portion 11, and further, the auxiliary pipe 32 (not shown) is provided in the extension direction of the turning guide inclined surface 63a. A boss portion 26 that can be connected to is arranged. The drain pipe joint 70 can obtain the same action and effect as the drain pipe joint 60, and further, even when the auxiliary pipe is connected to the boss portion 26, the boss portion 26 is arranged so as to extend upward. Therefore, even if the drainage W guided by the turning guide inclined surface 63a flows down, it is possible to prevent the backflow to the auxiliary pipe side connected to the boss portion 26.

Then, such boss portions 26, 26A,
26B is not limited to the drainage pipe joint 10 that includes the swivel guide 13 as in the embodiment, or the compactly configured drainage pipe joint 10, like the backflow prevention eaves portion 15.
It may be applied to a normal drain pipe fitting. For example, in FIG.
As shown in, the drain pipe joint 60 can also be formed with the boss portion 26A. Further, the number of the boss portions 26, 26A, 26B arranged on the body portion 11 is not limited to one, but a plurality of appropriate numbers can be provided.

In the drainage pipe joint 10 of the embodiment, the case where the drainage pipe joint 10 is arranged immediately above the slab S is shown.
The lid 50 of the drainage pipe joint 40 may be attached to the pipe 4, and the joint 10 may be arranged between the vertical pipes 1 and 2 between the slabs S. In this case, if the lid body 50 is removed, the opening of the lateral connection portion 24 can be used as a cleaning port. Even in this case, the cleaning opening is
It is also possible to insert a telespect camera or a full water test ball.

The bosses 26, 26A and 26B are exemplified as the case where the end side opening 28 is formed by punching after casting, but it is obvious that the bosses 26, 26A can be used.
-If it is 26B, it may be opened by casting at the time of casting.

Furthermore, in the drainage pipe joint 10 of the embodiment,
Although the flexible joint type is illustrated, as shown in FIGS. 27 and 28, the present invention may be applied to a straight pipe joint type drainage pipe joint 10A. Furthermore, the number of horizontal connecting portions to be connected to the body portion 11 is not limited to one, and a plurality of horizontal connecting portions 66 and 68 may be arranged in the body portion 11 as shown in FIGS.

Each horizontal connection portion 66 of this drainage pipe joint 10A
Similarly to the joint 60 shown in FIGS. 22 to 24, 68 is a stopper portion 66a / 68a and a sealing material 66b / 68b (reference numeral 6).
And 8b are not shown in the drawing). Then, the inner peripheral surface 12 of the body portion communicating with each of the lateral connecting portions 66 and 68.
A backflow prevention eaves portion 15 having a water collecting portion 16 is arranged at each of the upper edges 14a of the communication openings 14 on the side.
Further, on the inner peripheral surface 12 of the body portion 11, each of the lateral connection portions 66.6
8 and the opening 14 of the lateral connection portion 66 at the same level as
A swivel guide 13 similar to the joint 10 of the embodiment is arranged at a position opposed to.

It should be noted that each of the lateral connecting portions 66 and 68 has a lower end 13
The swivel guide 13 is disposed on the body 11 so that the side b is separated from the lateral connecting portions 66 and 68, and as shown in FIG.
With the body axis C as the center, the L-shaped lateral connection portion 66.6
8 may be arranged, or, as shown in FIG. 29, the horizontal connecting portions 66 and 68 may be arranged in an inverted L shape with the body part axis C as the center. Further, as shown in FIG. 30, the lateral connecting portions 66 and 68 are arranged so as to face each other with the trunk portion center axis C therebetween, and the trunk inner surface 1 between the lateral connecting portions 66 and 68 is disposed.
One or two swivel guides 13 may be provided on the two.

Furthermore, according to the present invention, as shown in FIG. 31, the inner tube layer 10a formed of a synthetic resin material such as vinyl chloride resin is disposed on the inner peripheral surface side and the outer surface side. It may be applied to the drainage pipe joint 10B having a fire-resistant double-layer structure, which is formed of at least a double-layer structure of an outer pipe layer 10b made of mortar or the like having fire resistance, which is disposed at a site.
In this drainage pipe joint 10B, a backflow prevention eaves portion 15 having a water collecting portion 16 is provided at an upper edge 14a of the communication opening 14 on the inner peripheral surface 12 side of the body portion 11 which is communicated with the lateral connection portion 24B. The turning guide 13 is arranged on the inner peripheral surface 12 of the body portion at the same level as the opening 14. It should be noted that the upper / lower / horizontal connection portions 21, 22, 24B of this joint 10B are respectively provided with corresponding drainage stack pipes 1B, 2B of a fireproof double-layer structure.
-The lateral branch pipe 4C is to be connected.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a usage mode of a drainage pipe joint according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of the drainage pipe joint of the same embodiment, which corresponds to a II-II portion in FIG. 1.

FIG. 3 is a cross-sectional view of the drainage pipe joint of the same embodiment, which corresponds to a III-III portion in FIG. 1.

FIG. 4 is a cross-sectional view of the drainage pipe joint of the same embodiment, which corresponds to the IV-IV portion in FIG. 1.

FIG. 5 is a partial perspective view showing a backflow prevention eaves portion of the same embodiment.

FIG. 6 is a partial perspective view showing a modified example of the backflow prevention eaves portion.

FIG. 7 is a plan view of the backflow prevention eaves portion shown in FIG.

8 is a vertical cross-sectional view of the backflow prevention eaves portion shown in FIG.

FIG. 9 is a partial perspective view showing another modified example of the backflow prevention eaves portion.

10 is a plan view of the backflow prevention eaves portion shown in FIG. 9. FIG.

11 is a vertical cross-sectional view of the backflow prevention eaves portion shown in FIG.

FIG. 12 is a plan view showing still another modified example of the backflow prevention eaves portion.

13 is a vertical cross-sectional view of the backflow prevention eaves portion shown in FIG.

14 is a front view of the backflow prevention eaves portion shown in FIG.

FIG. 15 is a plan view showing still another modified example of the backflow prevention eaves portion.

16 is a vertical cross-sectional view of the backflow prevention eaves portion shown in FIG.

FIG. 17 is a front view of the backflow prevention eaves portion shown in FIG. 15.

FIG. 18 is a vertical cross-sectional view showing a modified example of the boss portion.

FIG. 19 is a vertical cross-sectional view showing a usage state of another drainage pipe joint using the backflow prevention eaves portion of the embodiment.

20 is a vertical cross-sectional view of the drain pipe joint shown in FIG.
It corresponds to the XX-XX site in FIG.

FIG. 21 is a cross-sectional view of the drain pipe joint shown in FIG.
It corresponds to the XXI-XXI site in FIG.

FIG. 22 is a vertical cross-sectional view showing a usage state of still another drainage pipe joint using the backflow prevention eaves portion of the embodiment.

23 is a vertical cross-sectional view of the drain pipe joint shown in FIG.
It corresponds to the XXIII-XXIII site in FIG.

24 is a cross-sectional view of the drain pipe joint shown in FIG. 22,
It corresponds to the XXIV-XXIV site in FIG.

FIG. 25 is a vertical cross-sectional view showing a usage state of still another drainage pipe joint using the backflow prevention eaves portion of the embodiment.

26 is a cross-sectional view of the drain pipe joint shown in FIG. 25,
It corresponds to the XXVI-XXVI site in FIG.

FIG. 27 is a vertical sectional view showing a drainage pipe joint of another embodiment.

28 is a cross-sectional view of the drain pipe joint shown in FIG. 27,
It corresponds to the XXVIII-XXVIII site in FIG.

29 is a cross-sectional view showing a modified example of the drainage pipe joint shown in FIG. 28. FIG.

FIG. 30 is a cross-sectional view showing another modified example of the drainage pipe joint shown in FIG. 28.

FIG. 31 is a vertical sectional view showing a drainage pipe joint of still another embodiment.

[Explanation of symbols]

1, 1A, 1B, 2, 2A, 2B ... Drainage stack pipe, 4A, 4B, 4C ... (Piping) side branch pipe, 10 / 10A, 10B ... Drainage pipe joint, 11 ... Body part, 12 ... Inner circumference Surface, 14 ... Communication opening, 14a ... Upper edge, 14c ... Center, 15.15A ・ 15B ・ 15C ・ 15D ... Backflow prevention eaves portion, 16 ... Water collecting portion, 17 ... End surface side water collecting recess, 18 ... Top surface side Water collecting concave part, 20 ... Connection opening, 21 ... Upper connecting part, 22 ... Lower connecting part, 24.24B, 66.68 ... Horizontal connecting part, 26.26A, 26B, 26L, 26R ... Boss part, 32 ... Auxiliary Piping, C ... Shaft axis, W ... Drainage.

Claims (6)

[Claims] 1. A substantially cylindrical body portion having upper and lower connecting portions, which are respectively connectable to a drainage vertical pipe, at upper and lower ends thereof, and is provided with a pipe other than the vertical pipe. Is a drainage pipe joint configured by arranging a horizontal connection part, wherein the body part is provided at an upper edge of a communication opening communicating with the horizontal connection part on the inner peripheral surface side of the body part. A backflow prevention eaves portion that is disposed in a direction substantially orthogonal to the axis and that prevents drainage flowing down from above from flowing into the lateral connection portion, is arranged so as to project toward the axial center side of the body portion, and A swirl guide capable of imparting swirlability to the drainage flowing down from above is arranged in a region from the vicinity of the upper edge of the communication opening to immediately before the lower connection part on the inner peripheral surface of the portion. A drainage pipe joint characterized by the above. 2. The backflow preventing eaves is provided with a water collecting portion for collecting drainage from above and flowing down above the center of the communication opening as viewed from the axial center side of the body. The drainage pipe joint according to claim 1, wherein the drainage pipe joint is provided. 3. The water collecting part has the projecting end near the center of the communication opening at the projecting end toward the axial center of the trunk part when viewed from above the backflow prevention eaves part. The drainage pipe joint according to claim 2, wherein the drainage pipe joint is configured so as to be provided with an end surface side recessed portion that approaches the side. 4. The water collecting part is configured by forming a downwardly recessed upper surface side recessed portion above the center of the communication opening on the upper surface side of the backflow prevention eaves portion. The drainage pipe joint according to claim 2 or claim 3. 5. The drainage pipe joint according to claim 2, wherein a boss portion to which an auxiliary pipe can be connected is formed in the body portion by drilling. 6. The drainage pipe joint according to claim 5, wherein the boss portion is formed so as to extend upward from the body portion.