JPH0728286U - Drainage pipe fittings - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a pipe joint that is lightweight and inexpensive, has excellent weather resistance, and can be used as a drain pipe for a spiral pipe made of thin-walled stainless steel having a long service life. [Structure] A pipe joint 4 for connecting an upper drainage vertical pipe 2 made of a thin stainless steel spiral pipe to a lower drainage vertical pipe 3, and a receiving port 5a for the upper drainage vertical pipe 2. A joint body 5 having an insertion port 5b for the lower side drainage vertical pipe 3, a tubular elastic packing 6 interposed between the upper side drainage vertical pipe 2 and the receiving port 5a, and a lower side drainage vertical pipe 3 and an O-ring 7 interposed between the insertion port 5b and an annular groove a for fitting and holding the O-ring 7 on the outer peripheral surface of the insertion port 5b.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pipe joint for a drainage plumbing pipe to be installed in a multi-story building such as an apartment house or an office building, or other general houses.

[0002]

[Prior art]

 For example, in an apartment house, a rainwater drainage pipe is installed along the outer wall, or drainage pipes for sewage and miscellaneous drainage are installed through the floor slab of the common equipment piping space. Drainage facilities are provided in which drainage vertical pipes are separately connected to the vertical pipe portions of the horizontal drainage pipes.

At present, a cast iron pipe, a drainage lining pipe, a fiber mortar double-layer pipe, or the like is used as a drainage vertical pipe in this drainage facility, but the work efficiency in construction is extremely high because all of them are heavy. There was a problem that the cost was high, the material cost and construction cost were high, and the total cost was high.

In addition, a lightweight and inexpensive synthetic resin pipe may be used as a drainage pipe for rainwater gutters installed outdoors. However, in this case, since the material lacks weather resistance, In addition to the short number of years, there was a problem that it was easily damaged by a slight shock due to fatigue over the years.

By the way, since all of these problems are caused by the material of the drainage vertical pipe, it is possible to use a lightweight, inexpensive, and weatherproof pipe of another material as the drainage vertical pipe. It is possible to solve. As such a pipe, a spiral pipe made of thin stainless steel for air transportation, 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-walled stainless steel is spirally wound and adjacent edges are connected by means such as caulking, and it is lightweight and inexpensive, and has excellent weather resistance. It has features such as long service life.

[0006]

[Problems to be solved by the device]

 However, when this spiral pipe is used as a drainage vertical pipe, the following problems occur. That is, as a pipe joint for connecting the above-mentioned spiral pipes to each other, a sleeve 8 made of sheet metal having a bulged portion c bulged in an intermediate portion is conventionally used as shown in FIG. Was inserted into the upper and lower spiral tubes, and their overlapping portions were fastened with tapping screws 9.

This connecting means was permitted because the object to be conveyed was air, and if the above spiral pipe is used as a standing pipe for drainage, and if the same connecting means is used, the drainage on the upper side The drainage directly enters between the standing pipe 2 and the sleeve 8 and oozes to the outside from the screw 9 fixing portion. Of course, the drainage also flows between the lower drainage pipe 3 and the sleeve 8 by licking the pipe wall due to the capillary phenomenon, and this drains out from the screw 9 stopper portion.

Further, the spiral pipe itself is lightweight and easy to handle at the time of construction, but it requires a troublesome and troublesome connection work by the tapping screw 9, and the drainage standing pipe on the lower side is a cast iron pipe or In the case of a drainage lining pipe, the sleeve 8 cannot be screwed.

The present invention has been made on the basis of the above consideration results, and an object of the present invention is to provide a pipe joint suitable for using a spiral pipe made of thin-walled stainless steel for a drainage vertical pipe.

[0010]

[Means for Solving the Problems]

 The technical means 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 the upper side drainage vertical pipe made of a thin stainless steel spiral pipe to the lower side drainage vertical pipe. A joint body having a receiving port and an insertion port for the lower drainage pipe, a cylindrical elastic packing interposed between the upper draining pipe and the receiving port, and a lower drainage pipe. It is characterized in that it is composed of an O-ring interposed between the insertion opening and the insertion opening, and that an outer peripheral surface of the insertion opening is provided with an annular groove for fitting and holding the O-ring.

[0011]

[Action]

 According to the above configuration, the drainage vertical pipe on the upper side is inserted into the receiving port via the cylindrical elastic packing, and the insertion port fitted with the O-ring is inserted into the drainage vertical pipe on the lower side. By doing so, the upper and lower drainage pipes are connected to each other in a watertight manner.

[0012]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. Figure 1 shows the structure of the connection of the vertical pipe of the drainage system such as rainwater, sewage, and miscellaneous drainage that does not apply a large pressure. Here, the strip-shaped thin stainless steel material 1 is spirally wound and Light-weight, inexpensive, weatherproof, and long-life thin-walled stainless steel spiral tubes, which have a structure in which adjacent edges are connected by means such as caulking, are used for the drainage standpipes 2 and 3.

The pipe joint 4 connecting the upper and lower drainage vertical pipes 2 and 3 includes a tubular joint body 5 made of sheet metal (stainless steel) and a cylindrical elastic pad for sealing the drainage vertical pipe 2 on the upper side. It consists of a king 6 and an O-ring 7 for sealing the lower drainage pipe 3.

Specifically, the joint body 5 has a diameter larger than the outer diameter of the upper drainage vertical pipe 2 and an upper receiving port 5a for inserting the upper drainage vertical pipe 2 and a lower portion. The drainage vertical pipe 3 has a diameter slightly smaller than that of the side drainage vertical pipe 3 and a lower insertion port 5b for inserting into the lower drainage vertical pipe 3 is connected by a funnel-shaped member 5c. An annular groove a for fitting and holding an O-ring 7 that comes into close contact with the inner surface of the lower drainage standpipe 3 by elastic deformation is provided on the outer peripheral surface of the insertion port 5b.

On the other hand, the tubular elastic packing 6 is made of rubber, for example, and is provided at the upper end of the tubular portion 6a which is in close contact with the outer surface of the upper drainage 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 vertical pipes 2 and 3 are connected by the pipe joint 4 in the following procedure, for example. First, the elastic packing 6 is fitted into the upper drainage standing tube 2 from the outer flange portion 6b side so as to tightly cover the caulking portion b of the upper side draining standing tube 2 with the tubular elastic packing 6 so as to be in close contact therewith. .

Next, the receptacle 5 a of the joint body 5 is fitted into the elastic packing 6 so that the receptacle 5 a of the joint body 5 is closely contacted, and the joint body 5 is inserted and connected to the drainage standing pipe 2 on the upper side. .

At this time, since the outer flange portion 6b is continuously provided on the upper end of the elastic packing 6, the elastic packing 6 is not fitted inside the receiving port 5a, and the outer flange portion 6b and By visually observing the gap with the end edge of the receiving port 5a, the insertion amount of the elastic packing 6 into the receiving port 5a can be visually confirmed. That is, by using the outer flange portion 6b as a mark, it is possible to avoid excess or deficiency of the 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 drainage standing pipe 3 on the lower side, and the O-ring 7 is placed on the drainage standing pipe 3 on the lower side. , And the joint body 5 is inserted into and connected to the drainage standing pipe 3 on the lower side.

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

FIG. 2 shows another embodiment of the present invention. In this embodiment, a vertical pipe portion of a horizontal drain pipe such as a cast iron pipe or a drainage lining pipe is used as a lower drain pipe 3, and the drain vertical pipe 3 is connected to the thin-walled stainless steel via the pipe joint 4 described above. It shows a structure in which the upper drainage vertical pipe 2 made of a steel spiral pipe is connected.

According to the configurations of the respective embodiments described above, the drainage standing pipe 2 on the upper side is inserted into the receiving port 5a of the joint body 5 via the elastic packing 6, and the insertion port 5b of the joint body 5 is inserted into the O-ring 7. The upper and lower drainage pipes 2 and 3 can be connected to each other by simply inserting them into the drainage pipe 3 on the lower side via, and no complicated connecting work with tapping screws is required, and work efficiency in construction is improved. Even if the drainage vertical pipe 3 on the lower side is a vertical pipe portion of a horizontal drainage pipe such as a cast iron pipe, it can be easily connected to the drainage vertical pipe 2 on the upper side. .

Moreover, in addition to the fact that the drainage does not directly enter between the drainage standing pipe 2 on the upper side and the receiving port 5a, and between the insertion port 5b and the drainage standing pipe 3 on the lower side. Since there is the elastic packing 6 and the O-ring 7 between them, the leakage of water from the connecting portion is reliably prevented.

In the embodiment, the elastic packing 6 having a tubular shape is configured to forcibly cover the caulked portion b of the upper drainage vertical pipe 2, but a spiral groove having a shape corresponding to the caulked portion b is formed. The elastic packing 6 may be preformed on the inner peripheral surface of the tubular portion 6a and screwed into the drainage standing pipe 2 on the upper side.

[0025]

[Effect of device]

 As described above, according to the drainage pipe fitting of the present invention, the drainage pipe on the upper side and the drainage pipe on the lower side are inserted through the elastic packing and the O-ring. Even if the drain pipe on the lower side is a spiral pipe made of thin stainless steel or cast iron, the connection target is not limited by the simple work of inserting each It is possible to easily connect the upper drainage vertical pipe, which is a spiral pipe made of thin stainless steel, to the drainage vertical pipe on the side in a simple and leak-free state.

Therefore, a thin-walled stainless steel spiral pipe, which is lightweight and inexpensive, has high weather resistance, and has a long service life, which has heretofore been used only in the field of air-conditioning equipment, can be used for rainwater, sewage or miscellaneous drainage. It has become possible to use it for drainage vertical pipes, etc., and this has led to improvement of work efficiency in construction and low-cost construction of drainage facilities.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a structure of a connecting portion between drainage vertical pipes made of a spiral pipe made of thin stainless steel.

FIG. 2 is a cross-sectional view showing a structure of a connecting portion between drainage vertical pipes in which a drainage vertical pipe on the lower side is a vertical pipe portion of a horizontal drainage pipe made of cast iron or the like.

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

[Explanation of symbols]

2 ... Upper drainage vertical pipe, 3 ... Lower side drainage vertical pipe, 5 ... Joint body, 5a ... Receiving port, 5b ... Inserting port, 6 ... Cylindrical elastic packing, 7 ... O-ring, a ... Annular groove .

Claims (1)

[Scope of utility model registration request] 1. A pipe joint for connecting an upper drainage vertical pipe made of a thin-walled stainless steel spiral pipe to a lower drainage vertical pipe, the receiving port for the upper drainage vertical pipe and the lower side. A joint body with an insertion port for the drainage pipe of
It comprises a cylindrical elastic packing interposed between the upper side drainage vertical pipe and the receiving port, and an O-ring interposed between the lower side drainage vertical pipe and the insertion port. The outer peripheral surface of
A pipe joint for a drainage vertical pipe, wherein an annular groove for fitting and holding the O-ring is provided.