JP2004036384A - Drain pipe joint and its connecting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drain pipe joint for easily responding to a request for such a barrier free structure for requiring to fix the drain pipe joint to a concrete slab so that even a horizontal branch pipe socket of the drain pipe joint becomes the height extremely close to the concrete slab for requiring to lay a horizontal branch pipe under the narrow floor in the barrier free structure of a building. <P>SOLUTION: This drain pipe joint 20 has a lower connecting part 25 arranged in a straight pipe shape. This drain pipe joint 20 can connect the horizontal branch pipe socket 22, in its turn, the horizontal branch pipe 28 in a state of approaching an upper surface of the concrete slab 30 by inserting the lower connecting part 25 via packing into an upper socket 27a of a downstream side vertical pipe 27 fixed so as to become flush by aligning an upper end part with an upper surface of the concrete slab 30. <P>COPYRIGHT: (C)2004,JPO

Description

The present invention, for example in drainage path collective housing apartments, etc., about the drainage pipe joint hands and its connection structure for connecting the floor of the lateral branch pipe to the standpipe which is piping through the lower floor from the upper floor.

FIG. 6 shows an example of piping construction using the drainage pipe joint. As shown in the figure, the drainage pipe joint 1 is fixed (backfilled) or supported so as to penetrate a concrete slab 4 that partitions an upper floor and a lower floor. The drainage pipe joint 1 connects a trunk 10 provided with horizontal branch pipe receiving ports 5 and 6 for connecting a horizontal branch pipe 7 and an upright standing pipe 2 provided on an upper portion of the trunk 10. And a lower connecting portion 1b provided at a lower portion of the body portion 10 and for connecting the standing pipe 3 on the downstream side. A toilet 8 is connected to the drainage pipe joint 1 and thus to the standpipe 3 via a horizontal branch pipe 7.
In recent years, the drainage fitting 1 of this type is provided with a swirling blade 9 for spirally turning the inflowing drainage inwardly in a pipe, so that the drainage flowing down to the swirling blade 9 is caused to collide. A so-called single-pipe type drain that generates a swirling flow to form an air core constantly communicating with the atmosphere at the center of the pipe, thereby keeping the pipe pressure constantly at atmospheric pressure and suppressing fluctuations in the pipe pressure accompanying the drainage flow The system is mainstream.
JP-A-2000-199248

As described above, since the drainage pipe joint 1 having the conventional swirl vanes 9 is directly buried and fixed in the concrete slab 4, the impact when the draining water flowing down collides with the swirl vanes 9 causes vibration and the concrete slab 4 is vibrated. To the drainage noise, which is particularly unpleasant for the residents on the lower floors.
Further, even in the drainage pipe joint 1 having no swirl blade 9, there is a problem that vibration occurs due to the inflow of the horizontal branch pipe drainage colliding with the inner wall of the pipe, which also causes a drainage noise.
The present invention has been made in view of this problem, and has as its object to provide a drainage pipe joint that can significantly reduce drainage noise even when vibration is generated from the drainage pipe joint, and a connection structure thereof.

For this reason, the present invention provides a drainage pipe joint having the configuration described in the claims or a connection structure thereof .
According to the drainage pipe joint according to the first aspect, the drainage pipe joint for connecting the horizontal branch pipe to the stack pipe drainage path is not directly fixed to the concrete slab, but is fixed to the concrete slab on the downstream side. Connected via a tube. In addition, since the packing mounted on the receiving port is interposed between the lower connection portion of the drain pipe joint and the receiving port of the downstream standing pipe, vibration generated at the drain pipe joint is absorbed by the packing, Therefore, the vibration propagating to the concrete slab is greatly reduced.
For this reason, for example, since the swirl vanes are provided inside the drainage pipe joint, even if vibration occurs due to the collision of the drainage with the swirl vanes, it is difficult for the vibration to be transmitted to the concrete slab, thereby greatly reducing the drain noise. Can be reduced.
In addition, even in the case of the drain pipe joint not provided with the swirling vanes, since the vibration generated by the inflow of the drain water from the horizontal branch pipe is difficult to propagate to the concrete slab, the drain noise is significantly reduced as described above. Can be reduced.

According to the drainage pipe joint according to claim 2 , the straight pipe-shaped lower connecting portion is inserted into the receptacle of the downstream standing pipe, and the downstream standing pipe is connected to the drainage pipe joint, and the downstream side pipe is connected to the downstream standing pipe. Of the drainpipe joint was made close to the upper surface of the concrete slab by fixing the riser port of the drainage pipe to the concrete slab with its upper end flush with the upper surface of the concrete slab. Since the connection can be made in a state, the horizontal branch pipe can be easily piped even when the space under the floor is low.
In recent years, the so-called barrier-free structure, which has no steps on the floor of a living room, and the free-plan structure, in which the location around the water can be arranged at a resident's preferred position, have become widespread. The clearance between the upper surface of the slab and the floor plate) is apt to be insufficient, and there is a demand that the piping of the horizontal branch pipe of the drainage pipe joint be as close as possible to the upper surface of the slab. According to the drainage pipe joint according to the second aspect, it is possible to easily meet the demand for such a barrier-free structure and a free plan structure.
According to the drainage pipe joint according to claim 3 or the connection structure according to claim 6, propagation of drainage noise to the concrete slab can be reduced in the same manner as described above.
Further, according to the drainage pipe joint according to the fourth aspect, the same operation and effect as described above can be obtained for a so-called fireproof double-layer pipe type drainage pipe joint. That is, even in the case of a fire-resistant double-layer pipe joint in which the surface of a vinyl chloride inner pipe is covered with a mortar fire-resistant coating layer, drainage flows into the joint, and vibration is caused by collision with the inner wall surface. Even if it occurs, the vibration does not directly propagate to the concrete slab, so that drainage noise caused by such vibration can be significantly reduced. In addition, since the lower connection part of the inner pipe (the exposed straight PVC pipe part with the refractory coating layer removed) is inserted into the upper receptacle of the standing pipe on the downstream side and connected, the horizontal branch is similar to the above. The pipe can be connected close to the upper surface of the concrete slab.
Further, according to the drainage pipe joint according to claim 5 , in addition to the above-mentioned effects, the horizontal branch pipe can be piped closer to the upper surface of the concrete slab. A barrier-free structure can be easily accommodated.

Next, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a connection structure of a drain pipe joint 20 according to the first embodiment. The drainage pipe joint 20 includes a body portion 21, a lateral branch pipe receiving portion 22 provided around the body portion 21, an upper receiving portion 24 provided at an upper portion of the body portion 21, and a lower connection provided at a lower portion of the body portion. It has a part 25.
For example, the toilet 8 (omitted in FIG. 1) is connected to the horizontal branch pipe receiving port 22 via a horizontal branch pipe 28. In the case of the present embodiment, a packing having a substantially cylindrical shape is interposed on the inner peripheral side of the horizontal branch pipe receiving port 22, and only by inserting the horizontal branch pipe 28 into the inner peripheral side of the packing, the horizontal branch pipe is inserted. A tube 28 is connected to the receptacle 22 in a watertight manner. In the case of this one-touch connection structure, the lateral branch pipe receiving port 22 is not provided with a portion projecting to the outer peripheral side such as a flange portion for bolt connection.
On the inner peripheral side of the body 21, swirling vanes 21 a for swirling the draining water flowing down are provided in a spirally projecting manner inward of the pipe. The stack drainage flowing down from the upstream stack 26 is decelerated by colliding with the swirling blade 21a, and after being decelerated, guided by the swirling blade 21a to form a swirling flow. Instead of or in addition to the swirling blade 21a, a guide that projects in an eave-like manner may be provided.
An upstream standing pipe 26 is inserted into the upper receiving port 24 via a packing (not shown).

The lower connection part 25 has a straight pipe shape as shown in the figure. The lower connection part 25 is inserted into the upper receiving port 27a of the standing pipe 27 on the downstream side. As shown in FIG. 2, a rubber packing 29 is interposed between the lower connecting portion 25 and the inner peripheral surface of the upper receiving port 27a. The packing 29 has a substantially cylindrical shape, and an annular tongue-like piece 29a is provided on the inner circumference thereof over the entire circumference. The lower connecting portion 25 of the drainage pipe joint 20 is inserted into the inner peripheral side of the tongue-shaped piece 29a, and the tongue-shaped piece 29a elastically adheres to the lower connecting portion 25, thereby forming the lower connecting portion 25. Is connected to the downstream standpipe 27 in a watertight manner.
In addition, since the tongue piece 29a is elastically pressed against the lower connecting portion 25, even if vibration occurs in the drain pipe joint 20, the vibration is absorbed by the tongue piece 29a.
At the lower end of the packing 29, a buffer piece 29b projecting inward is provided, and the lower end of the lower connecting portion 25 is abutted against this buffer piece 29b. When the buffer piece 29b is elastically deformed, the thermal expansion of the lower connecting portion 25 is absorbed.
In the case of the present embodiment, when the lower connecting portion 25 is inserted until the lower connecting portion 25 abuts on the buffer piece 29b as described above, the horizontal branch pipe receiving port 22 is positioned at a height substantially in contact with the upper surface of the concrete slab 30 as shown in the figure. Thereby, the horizontal branch pipe 28 is piped at the lowest position (the target position closest to the upper surface of the concrete slab 30).

Next, the standpipe 27 on the downstream side is buried back in the concrete slab 30 (backfilling portion 30a) and fixed. The upper end of the upper receiving port 27a is flush with the upper surface of the concrete slab 30. In this way, the lower connecting portion 25 is inserted into the upper receiving port 27a of the downstream standpipe directly fixed to the concrete slab 30, and the drainage pipe joint 20 is connected to the downstream standpipe.
As described above, the drain pipe joint 20 is configured to be connected to the downstream standing pipe 27 by simply inserting the straight pipe-shaped lower connecting portion 25 into the upper receiving port 27a. The pipe receiving port 22 can be lowered to a position almost in contact with the upper surface of the concrete slab 30, whereby the gap L0 between the horizontal branch pipe 28 and the upper surface of the concrete slab 30 is extremely small. Can be piped closer to the upper surface of the concrete slab 30 (lower position).

According to the drainage pipe joint 20 of the first embodiment configured as described above, the downstream standing pipe 27 is fixed to the concrete slab 30, and the upper receiving port 27 a of the downstream standing pipe 27 is inserted through the packing 29. The drain pipe joint 20 is connected. For this reason, the vibration generated when the drainage flowing down the upstream standing pipe 26 collides with the swirl vanes or the vibration generated when the horizontal branch pipe drainage flows in and collides with the pipe wall is not affected by the tongue of the packing 29. Since the vibration is absorbed by the shape piece 29a and the buffer piece 29b, the propagation of these vibrations to the concrete slab 30 is significantly suppressed.
As described above, according to the connection structure using the drainage pipe joint 20 of the present embodiment, since the vibration generated at the drainage pipe joint 20 is absorbed by the packing 29, the vibration is not directly transmitted to the concrete slab 30, and the drainage noise is reduced. It can be greatly reduced. In this regard, conventionally, since the drainage pipe joint was directly fixed to the concrete slab, these vibrations were directly propagated to the concrete slab, and as a result, drainage noise that was particularly unpleasant for residents on lower floors was generated. .
Further, according to the drainage pipe joint 20 of the present embodiment, the drainage pipe joint 20 is connected to the downstream standing pipe 27 by simply inserting the lower connecting portion 25 into the upper receiving port 27a. It becomes easy to set the horizontal branch pipe receiving port 22 at a lower position.
Further, the lateral branch pipe port 22 has a so-called one-touch type connection structure and does not have a flange portion protruding to the outer peripheral side thereof. Down to the position where it contacts the upper surface of the. It may also be allowed lever abuts interposed rubber vibration insulator plate between the lower end surface and the concrete slab upper surface of the horizontal branch pipe socket 22.

On the other hand, for example, as shown in FIG. 3, a flange portion 43 is provided at the lower connection portion, and this flange portion 43 is bolted to a flange portion 45 a inserted through the upright pipe 45 on the downstream side, so that the drainage pipe joint 40 is connected. In the case of connecting to the standpipe 45 on the downstream side, it is necessary to secure a space for tightening the bolts and nuts, and there is a limit in reducing the height of the lateral branch pipe receiving port 42. As a result, the lateral branch The gap L1 between the pipe 28 and the upper surface of the concrete slab 30 is larger than the gap L0 when adopted in the connection structure of the present embodiment.
However, even in the connection structure shown in FIG. 3, the downstream standpipe 45 is projected and fixed to the concrete slab 30 and the drainage pipe joint 40 is connected to the downstream standpipe 45 via packing (not shown). Is connected, drain noise can be reduced as in the first embodiment.
Furthermore, since the downstream standpipe 27 is directly fixed to the concrete slab 30, it is necessary to suspend the downstream standpipe on the lower surface side of the concrete slab in a hanging manner. No special fixture is required.
In addition, you may support using a hanging metal fitting etc. according to the construction method of backfilling.

Next, a drain pipe joint 37 according to a second embodiment will be described with reference to FIG. The second embodiment is different from the first embodiment in the connection form of the horizontal branch pipe. That is, the horizontal branch pipe receiving port 22 of the drain pipe coupling 20 according to the first embodiment is a so-called one-touch type receiving port. However, the horizontal branch pipe receiving port 31 of the drain pipe coupling 37 according to the second embodiment is a cap nut. The horizontal branch pipe 33 is connected by tightening the pipe 32 (cap nut type).
In this case, a ring-shaped packing (not shown) is attached to the inner peripheral side of the lateral branch pipe receiving port 31, and the lateral branch pipe 33 is inserted through the inner peripheral side of the packing and the inner peripheral side of the cap nut 32. By tightening the cap nut 32 in this inserted state, the horizontal branch pipe 33 is connected to the horizontal branch pipe receiving port 31 in a watertight manner.
As shown in the figure, in the case of this cap nut type connection form, since the cap nut 32 protrudes to the outer peripheral side of the receiving port 31, the horizontal branch pipe is in a range immediately before the cap nut 32 comes into contact with the upper surface of the concrete slab 30. The receptacle 31 can be made to approach. Therefore, as compared with the first embodiment, it is limited that the side branch pipe receiving port 31 approaches the concrete slab 30 by the amount of the overhang of the cap nut 32 (L0 <L2).
However, the drainage pipe joint 37 in this embodiment also has an upper receiving port 34 for connecting the upstream standing pipe 36 and a lower connecting part 38 for connecting the downstream standing pipe 35 to the lower standing pipe 36. The connecting portion 38 also has a straight pipe shape, and is inserted and connected to the receiving port 35a of the standing pipe 35 on the downstream side via a packing. Therefore, even if vibration occurs due to the drainage flowing from the horizontal branch pipe 33 colliding with the inner wall of the pipe joint, or the drainage stack colliding with, for example, the swirl vane 37b projecting from the body 37a, Since this vibration is absorbed by the packing, the vibration that propagates to the concrete slab 30 is greatly reduced, thereby making it possible to reduce unpleasant drainage noise.

Next, FIG. 5 shows a drainage pipe joint 44 according to a third embodiment. This third embodiment relates to a so-called fire-resistant coated double-layer pipe type drain pipe joint . In the figure, reference numeral 40 denotes an upstream standing pipe, reference numeral 41 denotes a downstream standing pipe, reference numeral 42 denotes a first adapter pipe, reference numeral 43 denotes a second adapter pipe, and reference numeral 44 denotes a drain pipe joint. These all have a structure in which an inner pipe (so-called PVC pipe) is coated with a fire-resistant mortar layer.
The upright pipe 40 on the upstream side is connected to the upper receiving port 44 a of the drain pipe joint 44. The lower portion of the upstream standing tube 40 is a portion (not shown ) in which the inner tube is exposed (bare) without a fire-resistant coating layer, and the exposed portion is inserted into the upper receiving port 44a, and A standpipe 40 is connected to a drain fitting 44. As shown, in this connected state, the exposed portion of the standing pipe 40 is not exposed to the outside.
The lower connection portion 44b of the drainage pipe joint 44 is also a straight pipe-shaped portion having no fireproof coating layer and an exposed inner pipe. The lower connection portion 44b is inserted into the upper receptacle of the first adapter pipe 42. . A packing 42a is mounted on the inner peripheral side of the upper receptacle of the first adapter pipe 42, and the packing 42a is elastically adhered to the inserted lower connection portion 44b.
A substantially lower half of the first adapter tube 42 is also a portion where the inner tube 42d without the mortar coating layer 42c is exposed, and the exposed portion 42b is inserted into the second adapter tube 43. The exposed portion 42b is inserted into the flange portion 43b formed on the inner periphery of the inner tube 43a in a state where there is almost no gap with the inner tube 43a of the second adapter tube 43 until it comes into contact with the flange portion 43b from above. It is glued.
In the second adapter tube 43, the outer peripheral surface of the inner tube 43a is entirely covered with a mortar coating layer 43c. The first and second adapter pipes 42 and 43 are directly backfilled and fixed in the concrete slab 30 (backfilling portion 30a).

The upright pipe 41 on the downstream side is connected to the second adapter pipe 43. The upper part of the standing pipe 41 on the downstream side is also a part where the inner pipe 41b without the mortar coating layer 41a is exposed, and the exposed part 41c is formed in a state where the second adapter pipe 43 has substantially no gap. 43b is inserted from below until it is almost abutted, and adhered in this inserted state.
As described above, the first and second adapter tubes 42 and 43 and the downstream standpipe 41 are integrated by bonding, and these constitute the downstream standpipe described in the claims. The upper receiving port (the portion where the packing 42a is attached) of the first adapter tube 42 corresponds to the upper receiving port described in the claims.
In addition, as shown in the drawing, also in the third embodiment, the upper end of the first adapter pipe 42 is substantially flush with the upper surface of the concrete slab 30. The drain pipe joint 44 is inserted into the first adapter pipe 42 to a position where the horizontal branch pipe receiving port 44b is almost brought into contact with the upper surface of the concrete slab 30, whereby the horizontal branch pipe 45 is extremely inserted into the concrete slab 30. It is piped in a low position close to.
Also according to the connection structure of the drainage pipe joint 44 of the third embodiment configured as described above, the lower connection part 44b of the drainage pipe joint 44 is inserted into the first adapter pipe 42 fixed to the concrete slab 30. Is provided with a packing 42a. For this reason, the vibration generated in the drainage pipe joint 44 is mainly absorbed by the packing 42a and does not propagate to the concrete slab 30, whereby drainage noise can be significantly reduced.
Further, the drainage pipe joint 44 has a one-touch connection mode in which the lower connection section 44b having a straight pipe shape is connected to the first adapter pipe 42 simply by inserting the same, so that the flange section shown in FIG. It can be connected at a lower position than the bolted connection type, so that the horizontal branch pipe 45 can be piped at a lower position so that it can easily cope with a barrier-free structure with a low underfloor space. Become.

The embodiments described above can be implemented with various changes. The present invention does not directly fix the drainage pipe joint to the concrete slab, but fixes the downstream standpipe to the concrete slab, and forms a straight pipe-shaped lower part of the drainpipe joint at the upper receptacle of the downstream standpipe. By inserting the connection portion through packing, the vibration generated at the drainage pipe joint is absorbed by the packing to reduce the vibration that propagates to the concrete slab, thereby significantly reducing drainage noise. It is characteristic. Therefore, as the connection form of the horizontal branch pipe, a one-touch type or a cap nut type can be appropriately selected and applied. However, by using the one-touch connection mode, the horizontal branch pipe can be piped at a lower position.
In addition, the configuration in which the upper receiving port of the downstream standing pipe is flush with and fixed to the upper surface of the concrete slab has been described as an example. That is, the upper end of the receiving port of the standing pipe on the downstream side may protrude from the upper surface of the concrete slab by several millimeters to several tens of millimeters , or may be recessed from the upper surface by several millimeters to several tens of millimeters. and rather it may also protrude size of this extent, if the surface is flush with the slab upper surface, including the pull-in dimensions, it is possible to obtain the advantageous effects described above. This configuration corresponds to an embodiment of the invention described in claim 3 or claim 6.
Further, the horizontal branch pipe receiving port is exemplified as a one-port type, but a drain pipe joint having two or more ports can be similarly implemented.
Further, the drainage pipe joint 20 (37) having the swirling blades 21a (37b) has been exemplified. However, this type of drainage pipe joint having no swirling blades can be similarly implemented. Can be obtained.

It is a figure which shows 1st Embodiment of this invention, and is a side view of the periphery of the connection part of the drainage pipe joint with respect to the standing pipe on the downstream side. It is a partially broken side view which shows the periphery of the upper receiving port of the downstream standpipe. It is a figure which shows another embodiment of this invention, Comprising: It is a side view around the said connection part of the form which connects a drainage pipe joint to a downstream standing pipe by bolting a flange. It is a figure which shows 2nd Embodiment of this invention, and is a side view which shows the vicinity of the connection part with respect to the standing pipe on the downstream side of the drainage pipe joint which has a cap nut type horizontal branch pipe socket. It is a figure which shows 3rd Embodiment of this invention, and is a side view which shows the periphery of the connection part with respect to the standpipe on the downstream side of the refractory two-layer pipe joint. It is a side view which shows the connection structure of the conventional drainage pipe joint.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 ... Conventional drainage pipe joint, 1b ... Lower connection part 20 ... Drainage pipe joint (1st Embodiment)
21a: swirl vane 22: horizontal branch pipe receiving port 25: lower connecting part 27: downstream standing pipe 28: horizontal branch pipe 29: packing 30, concrete slab 32, cap nut 42, first adapter pipe 44, fire-resistant double-layer pipe Joints L0, L1, L2: Clearance between horizontal branch pipe and upper surface of concrete slab

Claims (4)

Connecting a substantially cylindrical body, a horizontal branch pipe receiving port provided around the body for connecting a horizontal branch pipe, and an upstream standing pipe provided at an upper part of the body. An upper receiving port for, provided at the lower portion of the body, a connection structure to the downstream standing pipe of a drainage pipe joint having a lower connecting portion for connecting a downstream standing pipe,
The downstream standpipe is fixed to a concrete slab that defines an upper floor and a lower floor, and packing is interposed on the inner periphery of an upper receptacle of the downstream standpipe, and the lower part is disposed on the inner periphery of the packing. A connection structure for a drain pipe joint, wherein a connection part is inserted to connect the drain pipe joint to the upright pipe on the downstream side. The connection structure according to claim 1, wherein the lower connection portion has a straight pipe shape, and the upper end of the downstream standing pipe is flush with the upper surface of the concrete slab and fixed. Construction. Connecting a substantially cylindrical body, a horizontal branch pipe receiving port provided around the body for connecting a horizontal branch pipe, and an upstream standing pipe provided at an upper part of the body. An upper receiving port for connecting a drainage pipe joint made of vinyl chloride provided with a lower connecting portion for connecting a downstream standing pipe provided at a lower portion of the body to the downstream standing pipe. So,
The trunk portion, the horizontal branch pipe receiving port, and a fire-resistant coating layer provided on the surface of the upper receiving port, while the downstream standing pipe is fixed to a concrete slab that defines an upper floor and a lower floor, A drainage pipe joint having a configuration in which packing is interposed on the inner periphery of the upper receiving port of the standing pipe and the lower connection part is inserted into the inner peripheral side of the packing to connect the drainage pipe joint to the downstream standing pipe. Connection structure. The connection structure for a drainage pipe joint according to any one of claims 1 to 3, wherein the horizontal branch pipe receiving port is in contact with an upper surface of the concrete slab.

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