JP2001248197A - Piping system on-slab for drain pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a piping system on-slab for drain pipes which is capable of maintaining the joint strength of pipes and an appropriate drainage gradient and allowing simple construction work. SOLUTION: In the on-slab piping system for the drain pipes, a horizontal drain pipe 4 connecting a draining apparatus 9 to a vertical drain branch joint 20 intervening in a vertical drain pipe 5 is disposed between a slab 10 and a floor 8. The horizontal drain pipe 4 is screwed to the draining apparatus 9 at its upstream end and screwed to the vertical drain branch joint 20 at its downstream end, with the mid section of the pipe 4 joined to the joint 20 by insertion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drain pipe on a slab of a drain pipe in which a horizontal drain pipe (horizontal branch pipe) for a vertical drain pipe is a so-called rolling pipe on a slab.

[0002]

2. Description of the Related Art For example, in repair work of drainage pipes in a dwelling unit of an apartment house, if a drainage horizontal pipe extending from a vertical drainage pipe is installed under a slab, if this pipe is replaced, another person's dwelling downstairs is replaced. It is necessary to change the ceiling at the same time. For this reason, in the renovation work, a new drainage horizontal pipe is installed on the slab so that only the relevant dwelling unit is installed. In such a newly constructed drainage horizontal drawing pipe, piping is performed by combining a PVC lining steel pipe for drainage and an MD joint (flexible joint for drainage steel pipe).

[0003]

Since the pipes on the slab are provided with drainage pipes between the slab and the floor, if the distance between the drainage equipment and the vertical drainage pipe is long, an appropriate drainage gradient is required. May not be able to be secured. Further, even if the drainage gradient can be secured, there is a problem that the flange of the MD joint is stuck to the floor plate. On the other hand, if a threaded drainage joint is used, the joint strength of the pipe can be increased, and the protrusion of the joint does not hinder the joint. However, if all of the drainage horizontal pulling pipes are screwed, it is necessary to finally screw a drainage device (for example, a drainage trap) into the drainage pipe, resulting in a problem that the workability is extremely deteriorated.

[0004] It is an object of the present invention to provide a drain pipe on slab piping system which can maintain the joint strength of the pipe and an appropriate drain gradient and can easily perform the construction.

[0005]

According to the present invention, there is provided a drainage pipe on a slab piping system, wherein a drainage horizontal pulling pipe for connecting a drainage device and a vertical drainage branch joint provided on a drainage vertical pipe is provided between the slab and the floor. In the slab piping system of the drainage pipe interposed between the drainage horizontal pulling pipe, the upstream end is screw-joined to the drainage device, and the downstream end is screw-joined to the vertical drainage branch joint, and is inserted and joined at the middle part. It is characterized by being.

[0006] According to this configuration, the upstream end is screwed to the drainage device and the downstream end is screwed to the vertical drainage branch joint, so that the drainage lateral drawing pipe can have sufficient bonding strength. it can. Also, since the drainage horizontal pulling pipe is inserted and joined at the middle part, the upstream side of this joint is screwed to the drainage device, the downstream side is screwed to the vertical drainage branch joint, and finally By assembling the drainage horizontal drawing pipe by insertion joining, this can be easily constructed.

In this case, it is preferable that the bayonet joint is formed by interposing an O-ring and a press ring between the shaved tube on the connecting side and the receiving port for receiving the shaved tube.

According to this configuration, it is not necessary to use a flange or a bolt for the plug-in connection portion, so that the connection operation can be performed with one touch, and there is no obstruction such as the flange or the like being stuck to the floor plate.

[0009] In these cases, a socket joint is formed at the most downstream portion of the drainage horizontal drawing pipe on the upstream side for insertion connection, and a male screw is formed on the downstream side for external connection for threaded connection to the vertical drainage branch joint. Is preferably provided.

[0010] According to this configuration, by the socket joint,
The screw joint with the vertical drainage branch joint and the insertion joint with the upstream pipe portion of the horizontal drainage pipe can be performed with a single joint. For this reason, the number of parts of the tube material can be reduced.

In these cases, it is preferable that a stepped socket joint in which an axis on the inflow side and an axis on the outflow side are offset is provided at an intermediate portion of the drainage horizontal drawing pipe.

[0012] According to this configuration, the drain drain horizontal pulling pipe can be prevented from having a steep gradient by making only a part of the drain horizontal pull pipe steep by the stepped socket joint. Therefore, it is possible to prevent bubbles and foreign substances from remaining in the pipe without flowing, and to make the flow of drainage smooth. In addition, since it is not necessary to make each part have a steep gradient equal to or higher than the design value, it is possible to prevent an excessive force from being applied to the joint.

In these cases, it is preferable that the drainage device is a drainage trap for a washing machine. Also, in this case, a horizontal drainage branch joint that merges drainage from the drainage trap for a washing machine and drainage from another drainage trap is provided at an intermediate portion of the horizontal drainage pipe, and the horizontal drainage branch joint is connected to the washing machine. The drainage trap side has one receiving port, the other draining trap side has another receiving port, and a downstream merging portion. The other receiving port has a small diameter and a flat bottom surface with respect to the merging portion. Is preferably eccentric.

According to this configuration, in the horizontal drainage branch joint,
Detergent foam flows into the washing machine drain trap together with drain water through one of the receiving ports. In this state, even if the drainage of another drainage trap flows in through the other receptacle, since this receptacle is provided eccentrically, it is difficult for the foam of the detergent to prevent the inflow, and the drainage flow is smooth. It can be. In addition, a Y-shaped pipe, a T-shaped pipe, and a TY-shaped pipe are considered as a horizontal drainage branch joint.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view showing a drain pipe on a slab piping system according to an embodiment of the present invention; . As shown in the perspective view of FIG. 1 and the detailed plan view of FIG. 2, in this drain pipe repair work, the existing washbasin provided in the dressing room and corridor is removed, and a new vanity table 1 is installed. A small-sized washing machine drain pan 2 is installed so that the washing machine can be installed beside the vanity stand 1.
In connection with this renovation work, a new hot water supply pipe 3 for the vanity vanity 1 and a horizontal drainage pipe 4 for the washing machine drain pan 2 will be installed. Further, with the installation of the washing machine drain pan 2 and the new installation of the horizontal drainage pipe 4, the floor of the corridor and the dressing room is replaced.

When installing the vanity table 1, the water supply system
Use the existing water supply pipe up to the stopcock. In the hot water supply system, a new hot water supply pipe 3 is piped from the existing bath kettle and connected to the vanity stand 1. The drainage system uses an existing drainage branch pipe 6 extending from the existing drainage vertical pipe 5, and connects the P trap 7 of the vanity stand 1 to this. Although not shown, it is preferable to use a flexible joint for connecting the water supply pipe and the hot water supply pipe 3 to the vanity stand 1.

When the washing machine drain pan 2 is installed, an opening is formed in the newly provided floor plate 8, and the washing machine drain trap 9 provided in the washing machine drain pan 2 is suspended from the opening onto the slab 10 (FIG. 3). reference). On the other hand, the vertical drainage branch joint 20 is attached to the existing drainage vertical pipe 5, and the vertical drainage branch joint 20 is attached.
A drain passage (drain outlet) is perforated in the drain vertical pipe 5 by utilizing the above. Then, the vertical drainage branch joint 20 and the washing machine drainage trap 9 are connected by the drainage horizontal pulling pipe 4. That is, the washing machine drain trap 9 is connected to the existing drain vertical pipe 5 via the newly installed drain horizontal pulling pipe 4.

Next, with reference to FIG. 3 and FIG. 4, the structure around the drainage horizontal drawing pipe 4 for the washing machine will be described in detail. The drain horizontal pipe 4 includes a socket joint 21 connected to a vertical drain branch joint 20 and a drain trap 9 for a washing machine.
And a connecting straight pipe 22 connected thereto. These straight pipes and joints are composed of a coated steel pipe having a pipe diameter (nominal inner diameter) of 50 mm and a coated steel pipe joint.

The vertical drainage branch joint 20 includes a joint body 31 having a branch connection portion 32, a saddle band 33 rotatably attached to the joint body 31, and a bolt / nut for fastening the saddle band 33 to the joint body 31. 34. The branch connection part 32 has a female screw 3 for pipe on the inner surface of the tip part.
2a are formed, and an O-ring 35 is mounted on the inner surface of the base. In this case, the branch connection portion 32 projects slightly upward from the joint main body 31 so as to have a drainage gradient of 1/50.

In this vertical drainage branch joint 20, the drainage vertical pipe 5
So that the saddle band 33 is
And the O-ring 35 is fixed to the vertical drainage pipe 5 by bringing the O-ring 35 into close contact with the outer peripheral surface of the vertical drainage pipe 5. Although not shown in the figure, the branch connection portion 32 is guided in this state, and a drain port is formed in the vertical drain pipe 5 by a hole saw. In addition, since the mounting position (mounting height) of the vertical drainage branch joint 20 is arbitrary, it is determined in consideration of the level of the drainage trap 9 for the upstream washing machine and the drainage gradient (1/50). In particular, in the case of wastewater mixed with detergent bubbles, it is necessary to observe a 1/50 drainage gradient in order to make the wastewater flow smoothly.

The socket joint 21 has a plug-in type pipe receiving port 21a formed on the upstream side, and a male screw 21 for pipe formed on the downstream side.
b, and is screwed to the branch connection portion 32 of the vertical drainage branch joint 20. That is, the socket joint 2 is connected to the branch connection portion 32 of the vertical drainage branch joint 20.
The socket joint 21 is joined to the vertical drainage branch joint 20 by screwing the male screw 21 b while rotating the joint 1. In this way, by screwing the socket joint 21 to the vertical drainage branch joint 20, the socket joint 21 can be firmly bonded to the vertical drainage branch joint 20 with a predetermined drainage gradient.

The connecting straight pipe 22 is provided with a male screw 2 for pipe on the upstream side.
2a is formed as a shaved pipe 22b with the downstream side cut, and is inserted and joined to the socket joint 21 and screwed to the drain trap 9 for a washing machine. In this case, the O-ring 37 and the press ring 38 are attached to the shaved pipe 22b, and these are inserted into the socket 21a of the socket joint 21, so that the inner peripheral surface of the socket 21a and the outer peripheral surface of the shaved pipe 22b are provided. The O-ring 37 and the press ring 38 are inserted, and the connection straight pipe 22 is joined to the socket joint 21 in a watertight manner. That is, the connection straight pipe 22 is connected to the socket joint 21 with one touch in a state where the drain trap 9 for the washing machine is connected to the upstream end thereof.

The washing machine drain trap 9 penetrates through the washing machine drain pan 2 and is attached thereto in a watertight manner. A nozzle 41 for connecting a hose is attached to the upper part thereof so as to be adjustable in angle. The trap body 42 has a substantially P-type trap structure having a partition wall, and a female screw 43 a for a pipe is formed on the inner surface of the outflow portion 43. Although not shown in the figure, the trap body 42 for the washing machine drain pan 2 is not shown.
A spacer can be interposed in the mounting portion of the device, and a height adjustment (level adjustment) of about 10 mm is possible.

The drainage horizontal pulling pipe 4 configured as described above
Is piped with a 1/50 drainage gradient. As described above, the drainage gradient is set at the position where the drainage trap 9 for the washing machine is attached to the washing machine drainage pan 2 and the vertical drainage branch joint 2.
It can be adjusted by the attachment position to the drainage vertical pipe 5 of 0. The adjustment can also be made by the stepped socket joint 23 shown in FIG. The socket joint 23 has a steeply inclined portion 23c at an intermediate portion between the pipe receiving port 23a side and the pipe connection 23b side (shaved pipe). In other words, the axis on the inflow section side is offset from the axis on the outflow section side, and the step is approximately 15 mm. As described above, by using the stepped socket joint 23, 1/50 as a whole is obtained.
Since the drainage gradient of the wastewater can be maintained, it is possible to suppress the detergent bubbles remaining in the pipe, which are obstacles to the drainage.

Next, referring to FIG. 6 and FIG. 7, drainage horizontal drainage pipe 4 for a washing machine in another dwelling unit of a different type.
Will be described in detail. In this dwelling unit, the drainage from the vanity 1 flows into the drainage horizontal piping 4 in addition to the drainage from the washing machine drain pan 2. That is, the drainage of the washing machine drain pan 2 and the drainage of the vanity stand 1 merge in the middle of the drain horizontal pulling pipe 4 and flow into the vertical drain pipe 5 via the vertical drain branch joint 20. For this reason, the socket joint 21 is connected to an eccentric TY drainage joint (lateral drainage branch joint) 24 for merging, and the eccentric TY drainage joint 24 is connected to a connection straight pipe 22 for connecting the drain trap 9 for a washing machine. A long elbow 25 connecting the S trap 11 of the vanity 1 is connected. Also in this case, the straight pipe and the joint are constituted by a coated steel pipe having a pipe diameter (nominal inner diameter) of 50 mm and a coated steel pipe joint. However, the long elbow 25 of the bathroom vanity 1 series has a tube diameter of 40 mm.

The eccentric TY drainage joint 24 is composed of a junction 24a having a downstream end with a shaved pipe, a straight pipe receiving port 24b to which the long elbow 25 is connected, and a curved pipe receiving port 24c to which the connecting straight pipe 22 is connected. Have been. The junction 24a and the bent pipe receiving port 24c have a pipe diameter of 50
mm, the straight pipe receiving port 24b is designed to have a pipe diameter of 40 mm because the basin drainage flows. For this reason, the portion of the straight pipe receiving port 24b has a reducer structure in which the pipe diameter changes from 40 mm to 50 mm. More specifically, the merging portion 24a side and the straight pipe receiving port 24b side are flush with each other, and the axis of the straight pipe receiving port 24b is slightly eccentric (about 6 mm) downward with respect to the axis of the merging portion 24a. I have.

Thus, even if detergent bubbles remain on the merging section 24a side, the basin drainage flows under the bubbles, so that the flow of the basin drainage is not blocked by the bubbles. Moreover, the flow of bubbles can be promoted by the basin drainage. When the position of the washing machine drain pan 2 is farther than the position of the vanity 1 with respect to the vertical drain pipe 5, the vanity 1 is connected to the curved pipe receptacle 24c of the eccentric TY drainage joint 24. The bent tube receiving port 24c is made eccentric as described above. Also in this case, the joining portion 24a is joined to the socket joint 21 in an insertion form (an O-ring and a pressing ring), and the straight pipe receiving port 24b and the curved pipe receiving port 24c also have the long elbow 25 and the connecting straight pipe 22 respectively. They are joined in an insertion form (O-ring and push ring).

The long elbow 25 has an insertion type pipe receiving port 25a formed on the upstream side and a shaved pipe 25b with the downstream side cut off. The downstream side is inserted and joined to the eccentric TY drainage joint 24. The S trap 11 of the vanity 1 is inserted and joined (O-ring and pressing ring) on the upstream side. Pipe socket 25a of long elbow 25
A short pipe 45 having a tube diameter of 40 mm is used as an attachment at a joint between the S pipe 11 and the S trap 11, and a rubber ring 46 is interposed between the short pipe 45 and the S trap 11. In addition, the socket joint 21 and the connection straight pipe 22 have the same joining form as described above. Also,
The above-mentioned stepped socket joint 23 may be interposed between the socket joint 21 and the eccentric TY drainage joint 24.

As described above, according to the present embodiment, the vertical drainage branch joint 20 and the socket joint 21 are screw-connected, and the connecting straight pipe 22 and the washing machine drain trap 9 are screw-connected. The joining strength at the upstream end and the downstream end of the drainage horizontal drawing pipe 4 can be increased (even if a person gets on the pipe). Further, since the socket joint 21 and the connection straight pipe 22 or the eccentric TY drainage joint 24 are inserted and joined, the final pipe joining of the drainage lateral drawing pipe 4 can be easily performed. Therefore, the drainage drainage pipe 4 does not have an irregular drainage gradient, and can be easily installed.

The eccentric TY drainage joint is replaced with an eccentric Y
A drainage joint or an eccentric T drainage joint may be used.
Although not particularly shown, the floor plate and the joist may be cut or cut off at a portion where the horizontal drainage pipe interferes with the floor plate and the joist.

[0031]

As described above, according to the drainage pipe-on-slab piping system of the present invention, the drainage horizontal pulling pipe is constituted by a joining form combining screw joining and insertion joining, so that the joining strength is increased. And at the same time, the workability can be improved. Therefore, even in the case of piping on the slab, it is possible to maintain an appropriate drainage gradient, and in the renovation work, the work can be quickly performed without inconveniencing the neighbors.

[Brief description of the drawings]

FIG. 1 is an external perspective view illustrating a drainage pipe repair work in a dwelling unit to which a drainage pipe slab piping system according to an embodiment of the present invention is applied.

FIG. 2 is a detailed plan view illustrating a drainage pipe repair work in a dwelling unit according to the embodiment.

FIG. 3 is a side view around a drainage horizontal drawing pipe according to the embodiment.

FIG. 4 is an exploded perspective view around a drainage horizontal drawing pipe according to the embodiment.

FIG. 5 is a side view around another drainage horizontal drawing pipe according to the embodiment.

FIG. 6 is a detailed plan view illustrating another type of drainage pipe repair work in a dwelling unit according to the embodiment.

FIG. 7 is a side view around another type of drainage horizontal drawing pipe according to the embodiment.

[Explanation of symbols]

 Reference Signs List 4 drainage horizontal pipe 5 drainage vertical pipe 7 P trap 8 floor plate 9 washing machine drainage trap 10 slab 11 S trap 20 vertical drainage branch joint 21 socket joint 21a pipe socket 21b male screw 22 connecting straight pipe 22a male screw 22b shaved pipe 23 step socket Joint 24 Eccentric TY drainage joint 24a Confluence 24b Straight pipe receptacle 24c Curved pipe receptacle 37 O-ring 38 Press ring

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Kazuhiro Fujita 2-5-13 Sanno, Ota-ku, Tokyo F-term in Bencan Corporation 2D061 AA05 AB07 AC07 AD01 DD11 3H019 BA04 BA14 BB01 BB08

Claims (6)

[Claims] 1. A drain-on-slab piping system for a drainage pipe connected between a slab and a floor, the drainage horizontal pulling pipe connecting a drainage device and a vertical drainage branch joint interposed in a drainage vertical pipe, The on-slab piping system for a drainage pipe, wherein an upstream end is screw-joined to the drainage device and a downstream end is screw-joined to the vertical drainage branch joint, and is inserted and joined at an intermediate portion. . 2. The drainage pipe according to claim 1, wherein the insertion joint is formed by interposing an O-ring and a press ring between a shaved pipe on a connection side and a receiving port for receiving the shaved pipe. Piping system on slab. 3. A socket having a receptacle for the insertion connection formed on the upstream side at the most downstream portion of the drainage horizontal drawing pipe, and a male screw formed on the downstream side for screw connection with the vertical drainage branch joint. The piping system on a slab of a drainage pipe according to claim 1 or 2, wherein a joint is provided. 4. A stepped socket joint in which an axis on the inflow side and an axis on the outflow side are offset at an intermediate portion of the drainage horizontal drawing pipe. Or a piping system on a slab of a drain pipe according to 3. 5. The on-slab piping system for a drain pipe according to claim 1, wherein the drainage device is a drainage trap for a washing machine. 6. A horizontal drainage branch joint for joining drainage from the drainage trap for a washing machine and drainage from another drainage trap is provided at an intermediate portion of the horizontal drainage pipe. Consists of one receiving port on the drain trap side for the washing machine, the other receiving port on the other drain trap side, and a downstream merging section, and the other receiving port has a small diameter with respect to the merging section. The on-slab piping system of a drainage pipe according to claim 5, wherein the pipe is formed and is eccentric with the bottom being flush.