JP2001152501A - Drain pipe device and its regenerating method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the chipping work of the mortar fixing an existing union joint, vibration, and noise and to sharply reduce the construction period and the cost without requiring a skill for regeneration. SOLUTION: A vertical drain main pipe 1 arranged indoors or outdoors is connected via the union joint 6 fitted through story floor slab 2 in this drain pipe device, and the union joint 6 is fitted through the inside of an outer pipe 5 fixed through story floor slab 2. For regenerating the existing drain pipe device, the existing union 6 is cut off near the upper and lower faces of the story floor slab 2, and the remaining straight pipe portion is reutilized as the outer pipe 5 without requiring the chipping work of the mortar 4 fixing the existing union joint 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drain pipe device installed in a building such as a house indoors or outdoors, and a method for rehabilitating the same.

[0002]

2. Description of the Related Art Conventionally, as this kind of drain pipe device, there is one shown in FIGS. This drainage pipe device is
It is employed in low-rise buildings such as middle- and low-floor houses, office buildings, and the like. A vertical drain main pipe 41 is connected through a pipe joint 42 fixed through each floor slab 40. In a middle- or low-floor house, the fitting 42 is T
The floor slab 40 has a straight tube-shaped penetrating portion, and there is no such thing as a swirling flow such as a blade on its inner surface. The pipe joint 42 has a drainage pipe 43 from a sink or the like.
Is connected. A vertical drain main pipe 41 is connected to an upper receiving port of the pipe joint 42 through a drain collecting pipe 44, and a toilet 46 and the like are connected to the collecting pipe 44 through a sanitary vent 45. The collecting pipe 44 is a normal T-shaped pipe and penetrates the floor 47.

As shown in FIG. 10, the pipe joint 42 is inserted into a through hole 48 provided in a floor slab 40, and is buried between the through hole 48 and the floor slab 40. It is fixed by a mortar 49.

[0004]

However, in the above-mentioned prior art, when the existing drainage pipe device that has been piped is deteriorated, when the old drainage pipe device is renewed, all the existing drainage pipe devices are removed. However, the pipe joint 42 cannot be removed unless the mortar 49 to which the pipe joint 42 is fixed to each floor slab 40 is removed by a filing operation.
There are problems that vibration and noise are large, skill is required, and a long time is required. The present invention has been made in view of the above-described circumstances.
At the time of rehabilitation, it eliminates the mortar filing work that fixes the existing pipe joints, eliminates vibration and noise, does not require much skill, and can greatly reduce the construction period and reduce the cost of the drainage pipe device. It is to provide a rehabilitation method.

[0005]

According to the present invention, the following technical measures are taken to achieve the above object. That is,
The present invention relates to a drainage pipe device in which a vertical drainage main pipe disposed inside or outside a building such as a middle or low-rise residential building or an office building is connected via a pipe joint penetratingly mounted on a floor slab. Wherein the pipe joint is penetrated and mounted inside an outer pipe fixed to the floor slab in a penetrating manner. With this configuration, if the existing drainage pipe device needs to be rehabilitated due to aging, the connection between the pipe joint and the vertical drainage main pipe or the vertical drainage main pipe and the collecting pipe is separated, and the old existing pipe coupling is separated from the outer pipe. Then, a renewed pipe joint may be attached to the outer pipe, and a renewed vertical drain main pipe or the like may be connected to the renewed pipe joint.

Therefore, if the outer pipe is first fixed to the floor slab, it is not necessary to remove the outer pipe by filing the floor slab at the time of rehabilitation, eliminating vibration and noise.
Moreover, rehabilitation can be performed in a short period of time without much skill, and cost can be significantly reduced. Also,
The drain pipe device according to the present invention is characterized in that the outer pipe is a straight pipe portion which is cut off near the upper and lower surfaces of the floor slab of the existing pipe joint and left. According to the configuration of the present invention, in the existing drain pipe device, even when the existing pipe joint is not attached to the floor slab via the outer pipe, the existing pipe joint is used as the outer pipe when rehabilitating the existing drain pipe apparatus. It can be used, and the scribing work of the floor slab can be eliminated.

[0007] The drainage pipe device according to the present invention is characterized in that the pipe joint is made of a corrosion-resistant material such as stainless steel or synthetic resin. According to such a configuration,
The endurance of the pipe joint can be improved, the thickness of at least a portion of the pipe joint inserted into the outer pipe can be reduced, and the inner diameter of the pipe joint can be reduced to reduce the drainage flow area. Reduction can be prevented. When a synthetic resin is used for a pipe joint, it is necessary to cover the outer periphery of the pipe joint with a refractory. The method of rehabilitating a drainage pipe device according to the present invention is a method of rehabilitating an existing device of a drainage pipe, in which an existing pipe joint fixed to a floor slab is cut near upper and lower surfaces of the floor slab. Remove the upper and lower part and the existing vertical drain main pipe, and cut the existing pipe joint and leave the straight pipe part as the outer pipe,
A renewal pipe joint is inserted through the outer pipe, and a renewal vertical drain main pipe is connected to the renewal pipe joint.

Therefore, when the drainage pipe device is rehabilitated, it is not necessary to remove the existing pipe joint by filing the floor slab, the vibration and noise can be eliminated, and the rehabilitation can be performed in a short period of time without much skill. Cost reduction can be achieved. The renewal pipe joint is preferably made of a corrosion-resistant material such as stainless steel, synthetic resin or the like. Thereby, the durability of the pipe joint can be improved, the thickness of at least a portion of the pipe joint inserted into the outer pipe can be reduced, and the inner diameter of the pipe joint can be reduced from being reduced. It is possible to prevent a reduction in drainage area.
When a synthetic resin is used for a pipe joint, it is necessary to cover the outer periphery of the pipe joint with a refractory.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a first embodiment of an indoor drainage pipe device according to the present invention. As shown in FIG. 1, an indoor drainage pipe device according to the present invention includes a vertical drainage main pipe 1 installed indoors and a through hole 3 provided in a floor slab 2 of a middle / low-rise building in a penetrating manner. Inserted and mortar 4
Outer pipe 5 backfilled and fixed by the above, a pipe joint 6 inserted and mounted inside the outer pipe 5, and an upper end receiving port 7 of the pipe joint 6
And a drain collecting pipe 8 connected to the drain pipe.

In this drainage pipe apparatus, the outer pipe 5 is a straight pipe, the length of which is slightly longer than the thickness of the floor slab 2, and which is vertically fixed by the mortar 4, as shown in FIG. You. The outer tube 5 is, of course, fixed prior to the piping. The pipe joint 6 is formed in a straight tubular shape and formed with the receiving port 7 having an enlarged diameter portion at an upper end, a lower end serving as a port 9 of a straight pipe, and a rubber ring 10 (seal member) in the receiving port 7. It is installed. The pipe fitting to be attached to the outer pipe 5 is, in addition to the straight pipe one-touch joint type, a T type,
G-shaped fittings can be used.

Although only the lower portion of the drainage pipe 8 is shown, a conventional drainage pipe shown in FIG. 9 can be employed. The vertical drain main pipe 1 has a flange joint structure provided with a flange 1a on the outer periphery of an opening of the receiving end, and is fitted to the spigot 9 of the pipe joint 6 by a press ring 11, a packing 12, and the like. It has become. In the first embodiment, at the time of piping, the pipe joint 6 is inserted from above into the outer pipe 5 fixed to the floor slab 2 in advance, and the vertical drainage main pipe 1 on the lower floor is started up. At this time, the pipe joint 6 is slightly pulled up and held at the position shown by the two-dot chain line in FIG. Next, as shown by a two-dot chain line in FIG. 3, the vertical drain main pipe 1 is located at a position immediately below the spigot 9 of the pipe joint 6, and then the pipe joint 6 is lowered and the spigot 9 is vertically drained. The vertical drain main pipe 1 and the pipe joint 6 can be connected by inserting the push ring 11 into the receiving flange 1a of the vertical drain main pipe 1 with bolts and nuts (not shown).

Then, a drainage collecting pipe 8 is connected to a receiving port 7 of the pipe joint 6.
By inserting the lower end spigot 8a, the pipe joint 6 and the drainage pipe 8 can be connected with one touch. According to the first embodiment, if the inner diameter of the outer pipe 5 is slightly larger than the outer diameter of the straight pipe portion of the pipe joint 6, the pipe joint 6 can be easily inserted and mounted, and the workability is improved. Then, when the drain pipe device is deteriorated and the need for rehabilitation arises, the vertical drain main pipe 1 and the drain collecting pipe 8 of the initial construction are removed from the pipe joint 6, and then the pipe joint 6 is connected to the outer pipe 5
Can be pulled out upwards, and the mortar 4 does not need to be frayed at all, and the renewed vertical drain main pipe, pipe fittings, drainage collecting pipes, etc. can be piped immediately, and work can be done in a short period of time It is. In addition, since the outer pipe 5 is centered in the initial construction, the centering work is not required at the time of rehabilitation, the skill is not required, the safe rehabilitation work without vibration and noise can be performed, and the cost is greatly reduced. Can be planned.

In the above embodiment, the material of the pipe material such as the vertical drain main pipe 1, the outer pipe 5, the pipe joint 6, and the drain collecting pipe 8 is not limited, but the pipe material has corrosion resistance. Are preferred. The outer tube 5 of the first embodiment
Is to cut the existing pipe joint 61 (indicated by a two-dot chain line in FIG. 2) in the vicinity of the upper and lower surfaces of the floor slab 2 and apply the remaining straight pipe part when rehabilitating the existing drain pipe device due to aging. It is the method of rehabilitating the existing drainage pipe device according to the present invention that adopts such means.

That is, the embodiment of the drain pipe rehabilitation method according to the present invention provides a method for rehabilitating an existing drain pipe apparatus.
An existing pipe joint 61 (shown by a two-dot chain line in FIG. 2) fixed to the floor slab 2 is cut in the vicinity of the upper and lower surfaces of the floor slab 2 (see a part shown by a one-dot chain line C in FIG. 10). The upper and lower portions of the pipe and the existing vertical drain main pipe are removed, and the straight pipe portion of the existing pipe joint left after cutting is defined as an outer pipe 5.
And a renewal vertical drain main pipe 1 is connected to the renewal pipe joint 6. According to the embodiment of the rehabilitation method of the present invention, the mortar 4 is not required to be frayed at all, and the renewed pipe joint is inserted into the straight pipe portion of the existing pipe joint 61 already centered, that is, the outer pipe 5. Updating vertical drain main pipe, drain collecting pipe, etc. can be immediately installed on this,
It is possible to carry out construction in a short period of time. Moreover, the outer tube 5
As mentioned above, since it was centered in the initial construction,
No centering work is required for rehabilitation, no skill is required,
Safe rehabilitation work without vibration and noise can be performed, and the cost can be significantly reduced.

In this embodiment of the rehabilitation method, since the outer diameter of the renewal pipe joint 6 is slightly smaller than the inner diameter of the existing pipe joint 61, the cross-sectional area of the drainage flow is slightly reduced. By using a material having high corrosion resistance such as stainless steel, the wall thickness of the straight pipe portion of the renewal pipe joint 6 can be reduced, and the decrease rate of the drainage cross-sectional area can be reduced. Further, as a material of the renewal pipe joint 6, a corrosion-resistant material such as a synthetic resin other than stainless steel can be adopted. FIG. 4 shows another receiving structure of the pipe joint 6, wherein the receiving port 7 is provided with a tapered portion 7a which expands in a trumpet shape, and the sealing member 13 has an enlarged diameter portion 14 which comes into contact with the inner surface of the tapered portion 7a.
Is provided, and the circumference of the tapered portion 7a is tightened by a ring-shaped tightening band 16 having a diameter-reducing tightening portion 15 at one location in the circumferential direction.

By adopting such a receiving structure, the tightening state around the outer periphery of the receiving port 7 can be made uniform to enhance the sealing performance. FIG. 7 shows another example of the connection structure between the pipe joint 6 and the vertical drain pipe 1. The vertical drain pipe 1 is a straight pipe having no receiving port at the upper end, and the spigot 9 of the pipe joint 6 and the vertical drain pipe 1 are connected. The upper end is abutted with a sealing material 17 therebetween, and is fastened and fixed by a radially expandable and contractible band-like joint 18 composed of a C-shaped ring shown in FIGS. This band-shaped joint 18
Is a method in which a rubber-made cylindrical sealing material 19 is surrounded by a C-shaped split plate 20, and a bolt 2 is attached to a tightening flange 21 projecting substantially radially outward from both ends of the split plate 20.
2, the split plate 20 is configured to be able to expand or contract in the radial direction by tightening and loosening the bolt 22. Therefore, the joint 18 is previously fitted to the upper end of the vertical drain main body 1 at a position shown by a two-dot chain line in FIG. Pushing up the joint 18 upwards as shown in FIG.
By tightening and fixing the bolts 22 at the positions shown by solid lines in FIG.

FIG. 8 shows a second embodiment of the drainage pipe device according to the present invention. The main difference from the first embodiment is that the pipe joint 6 is divided into upper and lower parts so that an upper pipe joint 6a and a lower pipe joint 6b are formed.
And the two pipe joints 6a and 6b are butt-connected in the outer pipe 5 via the seal member 23. The upper pipe joint 6a has a mechanical joint type receiving structure at the upper end, and a lower half part is a straight tube and is a port to the outer pipe 5. That is, the outer peripheral portion of the end of the receiving end 24 of the upper fitting 6a is expanded and the outward flange 24 is formed.
a is formed, and a packing receiving portion 24 is formed at an open end of the receiving port 24.
The lower end b of the drainage collecting pipe 8 is inserted. The packing 25, the collar 26, the lock ring 27, the press ring 28
So that the upper fitting 26a and the drainage pipe 8 are connected by tightening and connecting the pressing ring 28 to the flange 24a using bolts 29 and nuts 30. Has become.

The lower pipe joint 6b has a straight tubular upper part and a spigot to the outer pipe 5, and a receiving port 31 is formed in the lower part. And a packing receiving portion 33, and a male thread portion 34 is provided on the outer periphery of the end of the receiving port 31. The upper end of the vertical drain main pipe 1 is a straight tubular spout, and the cap nut 35 is rotatably fitted to the outside. In the second embodiment,
When inserting and connecting the spout of the vertical drain main pipe 1 to the lower pipe joint 6b, first, a seal ring 36 is inserted into the sealing material receiving portion 32 of the lower pipe joint 6b, and the cap nut 35 is attached to the upper end of the vertical drain main pipe 1. The vertical drain main pipe 1 is inserted into the receptacle 31 of the lower pipe joint 6b, and the upper end of the vertical drain main pipe 1 is pressed against the seal ring 36. By screwing the cap nut 35 into the male thread portion 34 and tightening, the connection work between the vertical drain main pipe 1 and the lower pipe joint 6b is completed.

In the second embodiment, the receiving structure of the upper pipe joint 6a can be the one-touch joint type of the first embodiment, the joint type shown in FIG. 4, or the bunt joint type shown in FIG. Further, as the upper pipe joint 6a, a T-shaped or a G-shaped pipe joint shown in FIG. 10 can be employed. The lower pipe joint 6b uses a so-called straight pipe whose lower end is a straight tubular spout.
As the upper end receiving structure, a one-touch joint type in addition to the receiving structure shown in FIGS. 1, 4, and 7 can be adopted.

The drain pipe device according to the second embodiment of the present invention can be used for a method of rehabilitating an existing drain pipe device. That is, the existing pipe joint is cut near the upper and lower portions of the floor slab 2 and the remaining straight pipe portion is reused as the outer pipe 5, whereby the drainage pipe device can be rehabilitated. The present invention is not limited to the above embodiments. For example, a corrosion-resistant material such as stainless steel, a synthetic resin, or even a cast iron pipe can be adopted as a constituent material outside the pipe joints 6, 6a, 6b.

[0021]

As described above, the drainage pipe device according to the present invention is a drainage pipe device in which a vertical drainage main pipe is connected via a pipe joint penetratingly mounted on a floor slab. Since the existing drainage pipe system is configured to be penetrated inside the outer pipe fixed to the floor slab in a penetrating manner, if the existing drainage pipe device needs to be rehabilitated due to aging, the pipe joint and the vertical drainage main pipe or vertical drainage main pipe are required. After separating the connection with the collecting pipe and the like, and removing the old existing fitting from the outer pipe, the replacement fitting is installed in the outer pipe, and the updated vertical drain main pipe or the like may be connected to the replacement fitting. .

Therefore, if the outer pipe is first fixed to the floor slab, it is not necessary to remove the existing pipe joint by fraying the floor slab at the time of rehabilitation, eliminating vibration and noise, and further improving the skill. The drain pipe device according to the present invention cuts the outer pipe near the upper and lower surfaces of the floor slab of the existing pipe joint without need. It is composed of the straight pipe part left as it is. Therefore, even when the existing fitting is not attached to the floor slab via the outer pipe, the existing fitting can be used as the outer pipe at the time of rehabilitation of the existing drainage pipe device,
It is possible to eliminate the breaking work of the floor slab.

Further, the method for rehabilitating a drainage pipe device according to the present invention is a method for rehabilitating an existing drainage pipe device, wherein an existing pipe joint fixed to a floor slab is located near upper and lower surfaces of the floor slab. To remove the upper and lower parts and the existing vertical drain main pipe, cut the existing pipe joint and leave the straight pipe portion remaining as an outer pipe, insert a renewal pipe joint through the outer pipe, and install the renewal pipe. Since the renewed vertical drain main pipe is connected to the joint, it is not necessary to remove the existing pipe joint by scouring the floor slab, eliminating vibration and noise, and rehabilitating in a short time without much skill, It is possible to significantly reduce costs.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view showing a first embodiment of a drain pipe device according to the present invention.

FIG. 2 is a longitudinal sectional view showing a state where the outer tube is fixed to a floor slab in the embodiment.

FIG. 3 is a longitudinal sectional view showing a state where the pipe joint according to the embodiment is attached to an outer pipe.

FIG. 4 is a longitudinal sectional view showing another example of the socket structure of the pipe joint in the embodiment.

FIG. 5 is a partially cutaway front view of the band-shaped joint.

FIG. 6 is a top view of FIG. 5;

FIG. 7 is a longitudinal sectional view showing another example of the connection structure of the vertical drain main pipe and the pipe joint in the first embodiment.

FIG. 8 is a longitudinal sectional view showing a second embodiment of the drainage pipe device according to the present invention.

FIG. 9 is a front view showing an example of a conventional drain pipe device.

FIG. 10 is an enlarged sectional view of a main part of the conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vertical drain main pipe 2 Floor slab 4 Mortar 5 Outer pipe 6 Pipe joint 6a Upper pipe joint 6b Lower pipe joint

Claims (4)

[Claims] 1. A drainage pipe device in which a vertical drainage main pipe provided in a building is connected via a pipe joint penetratingly mounted on a floor slab, wherein the pipe joint is fixed to the floor slab in a penetrating manner. A drain pipe device, wherein the drain pipe device is penetrated and mounted inside the outer pipe. 2. The drainage pipe device according to claim 1, wherein the outer pipe is a straight pipe portion that is cut off near the upper and lower surfaces of a floor slab of an existing pipe joint. 3. The drainage pipe device according to claim 1, wherein the pipe joint is made of a corrosion resistant material. 4. A method for rehabilitating an existing device of a drain pipe,
The existing pipe joint fixed to the floor slab is cut near the upper and lower surfaces of the floor slab to remove the upper and lower parts and the existing vertical drain main pipe, and the straight pipe left after cutting the existing pipe joint is removed. A method for rehabilitating a drainage pipe device, characterized in that a pipe portion is an outer pipe, a renewal pipe joint is penetrated and mounted on the outer pipe, and a renewed vertical drain main pipe is connected to the renewal pipe joint.