JP2595397Y2 - Drainage pipe fittings - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint of a drainage pipe installed in a multi-story building such as an apartment house or an office building, or in a general house.

[0002]

2. Description of the Related Art In an apartment house, for example, a drainage stack for rainwater is installed along the outer wall, or a drainage stack for sewage or miscellaneous drainage is installed by penetrating a floor slab of a common facility piping space. Drainage facilities are provided in which these drainage pipes are separately connected to the standing part of the horizontal drainage pipe.

At present, cast iron pipes, drainage lining pipes, double-layer fiber mortar pipes, and the like are used as drainage standing pipes in this drainage facility. However, there is a problem that the material cost and the construction cost are increased, and the total cost is high.

In some cases, a lightweight and inexpensive synthetic resin pipe is used as a drainpipe for rainwater gutters installed outdoors. In this case, however, the material is inferior in weather resistance, so that it is difficult to use it. In addition to its short age, there is a problem that it is easily damaged by a small shock due to age-related fatigue.

[0005] Since these problems are all caused by the material of the drainage riser, the use of a lightweight, inexpensive, and other weather-resistant pipe as the drainage riser is required. It is possible to solve. As such a pipe, a helical pipe made of thin stainless steel for air conveyance, which is widely used in the field of air conditioning equipment, can be considered. This spiral tube has a structure in which strip-shaped thin stainless steel is spirally wound and adjacent edges are connected by means of caulking or the like. Has features such as long.

[0006]

However, when this spiral pipe is used as a drainage pipe, the following problems occur. That is, conventionally, as a pipe joint for connecting the above-mentioned helical tubes, as shown in FIG. 3, a sheet metal sleeve 8 having a bulged portion c bulged at an intermediate portion is used. And the overlapping portions thereof were fastened with tapping screws 9.

[0007] This connection means is permitted because the object to be conveyed is air. If the above spiral pipe is used as a standing pipe for drainage, and the same connection means is used for this, the drainage on the upper side is used. Drainage directly enters between the standpipe 2 and the sleeve 8, and oozes out from the screw 9 stop portion and the like. Of course, the drainage also flows between the lower drainage riser 3 and the sleeve 8 so as to lick the tube wall due to the capillary phenomenon, which oozes out from the screw 9 stop portion.

Further, the spiral pipe itself is lightweight and easy to handle at the time of construction. However, it requires cumbersome and troublesome connection work with the tapping screw 9, and the lower drainage vertical pipe is formed of a cast iron pipe or the like. In the case of a drainage lining tube or the like, the sleeve 8 cannot be screwed.

The present invention has been made based on the results of the above considerations, and has as its object to provide a pipe joint suitable for using a thin-walled stainless steel spiral pipe as a drainage riser.

[0010]

The technical measures taken by the present invention to achieve the above object are as follows. That is, the pipe joint according to the present invention is a pipe joint for connecting an upper drainage riser made of a thin stainless steel spiral tube to a lower drainage riser. A joint body having a mouth and an insertion opening for the lower drainage stack, and an outer flange portion at an upper end which is separate from the joint body and is interposed between the upper drainage stack and the receiving port But
It comprises a cylindrical elastic packing connected continuously , and an O-ring interposed between the lower drainage riser and the insertion opening, and the O-ring is fitted to the outer peripheral surface of the insertion opening. The feature is that an annular groove for holding is provided.

[0011]

According to the above arrangement, for example, a cylindrical elastic package is provided.
Insert the king from the outer flange side into the upper drainage standpipe
Then, fit the socket of the fitting body into the elastic packing.
The upper and lower drainage risers are connected to each other in a watertight manner by a construction procedure of inserting the O-ring fitted and held into the lower drainage riser. According to this construction procedure
Fit the elastic packing into the upper drainage stack
In addition to being able to visually check the amount of
When fitting into the packing, the outer
The elastic packing is connected so that the elastic packing
It does not fit inside the
By visually checking the gap between the flange part and the receiving edge,
Visually confirm the amount of sexual packing inserted into the receptacle
It is possible to mark the outer flange part
To adjust the amount of elastic packing
You can avoid.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a connecting structure of a standing pipe of a drainage system in which a large pressure is not applied, such as rainwater, sewage, and miscellaneous drainage. Here, a strip-shaped thin stainless steel material 1 is spirally wound and adjacent to each other. The thin stainless steel helical tube, which is lightweight, inexpensive, has excellent weather resistance, and has a long service life, has a structure in which the fitting edges are connected by means of caulking or the like.
3 used.

A pipe joint 4 for connecting the upper and lower drainage pipes 2, 3
Is a tubular joint body 5 made of sheet metal (stainless steel).
And a tubular elastic packing 6 for sealing the drainage riser 2 on the upper side, and an O-ring 7 for sealing the drainage riser 3 on the lower side.

Specifically, the joint main body 5 has an upper side receiving port 5a having a diameter larger than the outer diameter of the upper side drainage pipe 2 and into which the upper side drainage pipe 2 is inserted, and a lower side receiving port 5a. The drainage pipe 3 having a diameter slightly smaller than the inner diameter of the drainage pipe 3 and the lower side thereof
The lower side insertion port 5b for inserting the
An annular groove a that fits and holds an O-ring 7 that is in close contact with the inner surface of the lower drainage pipe 3 by elastic deformation is provided on the outer peripheral surface of the insertion port 5b therein. I have.

On the other hand, the cylindrical elastic packing 6 is made of rubber, for example, and is provided at an upper end of a cylindrical portion 6a which is in close contact with the outer surface of the upper drainage standing pipe 2 and the inner surface of the receiving port 5a of the joint body 5. The outer flange portion 6b is integrally connected.

The upper and lower drainage pipes 2 by the above-mentioned pipe joint 2
Connection 3 is performed, for example, in the following procedure. First,
The elastic packing 6 is fitted into the upper drainage riser 2 from the outer flange portion 6b side so that the cylindrical elastic packing 6 is forcibly covered on the swaged portion b of the upper drainage riser 2.

Next, the socket 5a of the joint body 5 is fitted into the elastic packing 6 so that the socket 5a of the joint body 5 is brought into close contact with the elastic packing 6, and the joint body 5 is inserted and connected to the drainage pipe 2 on the upper side.

At this time, since the outer flange portion 6b is continuously provided at the upper end of the elastic packing 6, the elastic packing 6 does not fit into the receiving port 5a.
By visually checking the gap between the outer flange portion 6b and the edge of the receiving port 5a, it is possible to visually confirm the insertion amount of the elastic packing 6 into the receiving port 5a. That is, by using the outer flange portion 6b as a mark, it is possible to avoid excessive or insufficient insertion amount of the elastic packing 6 into the receiving port 5a.

Next, with the O-ring 7 fitted and held in the annular groove a, the insertion port 5b is fitted into the lower drainage riser 3 and the O-ring 7 is inserted into the lower drainage riser 3. The joint body 5 is brought into close contact, and inserted and connected to the lower drainage riser 3.

The above connection procedure is an example.
The insertion port 5b of the joint body 5 in which the O-ring 7 is fitted and held is inserted into the lower drainage riser 3, and the socket 5 of the joint body 5 is inserted.
It is also possible to take a connection procedure in which the drainage riser 2 on the upper side is inserted into a through the elastic packing 6.

FIG. 2 shows another embodiment of the present invention. In this embodiment, for example, a standing portion of a horizontal drainage pipe such as a cast iron pipe or a lining pipe for drainage is used as a lower drainage standing pipe 3.
The structure in which the upper drainage riser 2 made of a thin stainless steel spiral tube is connected to the drainage riser 3 via the above-described pipe joint 4 is shown.

According to the construction of each of the above embodiments, the upper drainage standpipe 2 is inserted into the socket 5a of the joint body 5 via the elastic packing 6, and the insertion opening 5b of the joint body 5 is connected to the O-ring 7 The upper and lower drainage stacks 2 and 3 are connected to each other simply by being inserted into the lower drainage stack 3 via
No need for cumbersome connection work with tapping screws,
Not only does the work efficiency in the construction greatly improve, but even if the lower drainage pipe 3 is a standing part of a horizontal drainage pipe such as a cast iron pipe, this can be easily replaced with the upper drainage pipe 2. Can be connected to

Moreover, between the drainage riser 2 on the upper side and the receiving port 5a, and between the insertion port 5b and the drainage riser 3 on the lower side,
In addition to the fact that the drainage does not enter directly, the elastic packing 6 and the O-ring 7 exist between them, so that leakage from the connection portion is reliably prevented.

In the embodiment, the cylindrical elastic packing 6 is used.
Is formed so as to forcibly cover the swaged portion b of the upper side drainage vertical pipe 2. However, a spiral groove having a shape corresponding to the swaged portion b is formed in advance on the inner peripheral surface of the cylindrical portion 6a, and elasticity is improved. A configuration in which the packing 6 is screwed into the drainage riser 2 on the upper side may be adopted.

[0025]

[Effects of the Invention] As described above, according to the pipe joint of the drainage riser according to the present invention, the tubular elastic packing can be connected to the outer flange.
From the flange side into the upper drainage stack, and then
Insert the socket of the main body into the elastic packing, and
Insert the insertion hole into which the
Connect the upper and lower drainage stacks according to the construction procedure
Can be elastic packing against upper drainage stack
The fitting amount can be visually confirmed, and the fitting
When fitting into the elastic packing,
Since the outer flange part is connected continuously, elastic packing
Does not fit inside the socket, and
Visually check the gap between this outer flange part and the receiving edge
To visually check the amount of elastic packing inserted into the receptacle.
And the outer flange part is used as a mark.
Insufficient or insufficient amount of elastic packing
Can be avoided. Therefore, regardless of whether the lower drainage pipe is a spiral pipe made of thin stainless steel or made of cast iron, the connection target thereof is not limited,
An upper drainage standing pipe made of a thin stainless steel spiral pipe can be easily connected to the lower drainage standing pipe without any water leakage.

Therefore, a thin stainless steel spiral tube, which is lightweight, inexpensive, has excellent weather resistance and has a long service life, which has hitherto only been adopted in the field of air conditioning equipment, can be used for rainwater, sewage or gray water. Thus, it has become possible to use the same for drainage risers, thereby improving the work efficiency in construction and achieving low-cost construction of drainage equipment.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a connection structure between drainage risers formed of a spiral tube made of thin stainless steel.

FIG. 2 is a cross-sectional view showing a connection structure between drainage risers in which a lower drainage riser is a standing portion of a horizontally drawn drainage pipe made of cast iron or the like.

FIG. 3 is a cross-sectional view showing a connection structure between spiral tubes made of thin stainless steel for comparison with the present invention.

[Explanation of symbols]

2 ... Drainage riser on the upper side, 3 ... Drainage riser on the lower side, 5 ... Joint body, 5a ... Receptacle, 5b ... Insertion, 6 ... Elastic cylindrical packing, 7 ... O-ring, a ... Annular groove .

Claims (1)

(57) [Scope of request for utility model registration] 1. A pipe joint for connecting an upper drainage riser made of a thin-walled stainless steel spiral pipe to a lower drainage riser, comprising a receiving port for the upper drainage riser and a lower side. A fitting body having an opening for a drainage pipe of
A cylindrical elastic packing , which is separate from the joint body and has an outer flange portion connected to the upper end interposed between the upper drainage standpipe and the receiving port, is inserted into the lower drainage standpipe. An O-ring interposed between the opening and the opening, and an annular groove for fitting and holding the O-ring is provided on the outer peripheral surface of the insertion opening. Fittings.