JP2761481B2 - Drain pipe fitting - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to drainage pipe fittings, and more particularly to drainage fittings, particularly drainage horizontal pipes for discharging drainage from kitchen sinks, and spare pipes for replacement. The present invention also relates to a drainage pipe joint for connecting to a drainage pipe joint.

2. Description of the Related Art Conventionally, drainage horizontal pipes connected to kitchen sinks in drainage facilities in apartment houses and the like are relatively easy to clog and have a short life. When the pipe is clogged and cannot be repaired, a so-called renewal has been performed in which the clogged pipe is replaced.

In this case, the renewal of the piping is performed by peeling off the floor of the relevant portion, which is a large construction. In addition, there have been many inconveniences, such as the inability to use the equipment for a long time, the necessity of having the resident temporarily evacuate, and the troublesome work.

For this reason, in recent years, various piping techniques have been studied which can rationally cope with these inconveniences. However, both are in the development stage, and therefore, drainage pipe fittings suitable for this replacement have not yet been put into practical use.

(Problems to be Solved by the Invention) In view of the above circumstances, the inventor of the present application attempted to put into practical use a piping technology that can reasonably cope with the renewal of piping.
As a result of various studies, we have come up with technical means based on the following ideas.

This means is completely different from the conventional one based on the idea of “replacement of a new tube by replacing a clogged tube with a new tube”.

In other words, from the time of the initial plumbing, which is the time of new construction, separate drainage pipes are plugged at the drain end side of the drainage equipment separately from normal pipes, and are placed on the drainage stack side where space is small and work is difficult. Is to connect in advance. In this way, even if the pipes are clogged and cannot be repaired, simply connecting the drainage port of the drainage device and the plugged point and switching the pipes without any major work such as peeling the floor is required. "Renewal" can be dealt with rationally. In other words, it is considered that it is better to construct two drain horizontal pipes from the beginning, so to speak, a double-track system, because it eliminates the complexity associated with the conventional post-piping.

Further, as a result of repeated research and verification, it was found that the above-described method generally worked, but a major problem was encountered.

It is possible to connect multiple drain horizontal pipes at the same level to the drain stack side, and it can respond to various piping layouts, and also has a compact adapter type drain pipe joint that does not hinder the drainage flow performance after renewal. It is not.

The inventor of the present application considered that a basic structure of a so-called 90 ° TY joint, which has conventionally been generally used, is suitable as a general-purpose one that can respond to a piping layout. Therefore, as shown in Fig. 5, the above-mentioned double-line type piping was manufactured using this to simulate long-term use of a kitchen sink, and water containing a large amount of oils and fats was poured in the direction of the arrow in the figure. The drainage pipe was positively flown into the drainage pipe D, and the state of attachment of oils and fats was experimentally observed.

As a result, a large amount of attached oil and the like O was observed inside the 90 ° TY joint J as well as inside the drainage pipe D at the upstream portion thereof. In this state, even if the pipe was switched to a new spare pipe S, However, it was found that it was not possible to secure a smooth flow of drainage to the stack pipe V, and it was not possible to achieve the purpose of renewal.

An object of the present invention is to provide a 90 ° TY joint type drain pipe joint that can ensure the flow of drain water to a level that does not cause any practical problem even when switching to a new spare pipe S in such a double-track pipe. And

(Means for Solving the Problems) In order to achieve the above object, the drainage pipe joint of the present invention is configured such that one end is a horizontal pipe connection port of a horizontal drainage pipe connected to a drainage device such as a kitchen sink. In the direction substantially perpendicular to the axial direction of the main pipe portion, the end is a straight pipe-shaped main pipe portion having an end serving as a vertical pipe connection port for connection to the horizontal pipe connection port side of the drainage pipe joint. A spare pipe connection port of a spare pipe of the horizontal drain pipe connected to the drainage device is formed continuously, and the inside of the end of the standing pipe side connection port is tapered toward the downstream side in a tapered shape. Forming an enlarged diameter portion, and furthermore, from the connection portion between the main pipe portion and the spare pipe connection port to one side of the main pipe portion at the standpipe connection port side at the spare pipe connection port side, the inner cross section is radially The configuration is such that the bulging portion having a larger diameter is provided unevenly.

(Effect) If the above-described double-line pipe is formed by using the drainage pipe joint configured as described above, the adhesion of oils and fats and the like inside the drainage pipe joint as well as the inside of the drainage pipe at the upstream portion thereof can be achieved. However, there is an enlarged portion inside the end of the standpipe-side connection port, the cross-section of the pipe is larger than that of the main pipe, and a bulge provided unevenly on one side of the spare pipe connection side. Because of the enlarged portion, clogging is positively prevented at this portion.

Therefore, even when switching from the drainage horizontal pipe on the side of the horizontal pipe connection to the spare pipe, drainage can smoothly flow from the spare pipe connection through the space formed by the enlarged diameter portion and the expanded portion and having no adhesion. .

That is, even if the drainage horizontal pipe on the side of the horizontal pipe connection is clogged, by switching to a new spare pipe, the flow of drainage that does not interfere with practical use can be secured, and the purpose of renewal can be achieved.

(Embodiment) Next, an embodiment of the present invention will be described in detail with reference to FIG. 1 and FIG.

A drain pipe joint 1 according to the present invention has a horizontal pipe connection port 2 of a drain horizontal pipe D connected to a kitchen sink (not shown) at one end, and a straight main pipe having a standpipe connection port 3 at the other end. The main part is mainly composed of a part 4 and a spare pipe connection port 5 of a spare pipe S of a drainage horizontal pipe protrudingly connected in a direction substantially orthogonal to the axial direction of the main pipe part. Here, the standpipe side connection port 3 is connected to the horizontal pipe connection port side of the drainage standpipe joint V shown by a two-dot chain line in the figure.

By the way, since the drain horizontal pipe D and the spare pipe S are connected to the same drainage device, they are connected in parallel. Therefore, the drain horizontal pipe D is in principle connected via an elbow L or the like as shown in the figure. The pipe will be provided along the spare pipe S.

The spare pipe connection port 5 is where the spare pipe S, which is a spare drain pipe connected to the kitchen sink, is connected. At the time of drainage, the drainage smoothly flows toward the downstream side, that is, toward the upright-side connection port 3. It has an inclined portion 6 and a guide portion 7 and is integrally connected to the main pipe portion 4 so as to flow. Although not shown, the terminal of the spare pipe S is plugged near the trap portion of the kitchen sink so that the pipe can be easily switched in the future.

The basic structure of the above-described embodiment is the same as the basic structure of a conventional so-called 90 ° TY joint.

However, in the present example, a diameter-enlarging portion 8 is formed inside the end of the riser tube side connection port 3 of the main pipe portion 4 so as to taper toward the downstream side. Also, the enlarged diameter portion 8
A flange 10 having four bolt holes 9 at the corners is formed on the outside of the flange 10 and a tubular rib 11 having the same inner diameter as the enlarged diameter portion 8 is formed on the surface of the flange 10. I have.

The drainage pipe joint 1 is formed by fitting the annular rib 11 into the horizontal pipe connection port of the drainage pipe joint 1 and is flange-joined through a bolt (not shown).

Further, from the connection portion 12 between the main pipe portion 4 and the spare pipe connection port 5 to one side of the main pipe portion 4 on the side of the spare pipe connection port in the standpipe side connection port 3, the inner cross section is directed radially in the third direction. In FIG. 4 and FIG. 4, a bulging portion 13 having an increased diameter is provided unevenly with respect to a base line B indicated by a one-dot chain line. As a result, the expanded portion 13
In the present example, is formed in a so-called crescent shape when viewed from the axial direction of the main pipe portion 4.

Thus, due to the enlarged diameter portion 8 and the expanded portion 13, the flow path cross section of the drainage is formed significantly larger than that of the main pipe portion 4, especially in the expanded portion 13.

Now, in this example, both the drain horizontal pipe D and the spare pipe S are made water-tight by tightening a cap nut 15 through an annular packing 14 made of synthetic rubber or the like by a so-called slide method, so that each horizontal pipe is connected. The port 2 and the spare pipe connection port 5 are connected. Note that this connection method is not particularly limited, and may be, for example, a method of directly screwing. This means
The same applies to the standpipe connection port 3.

In this example, an inspection cleaning port 17 provided with two screw holes 16 is opened. By doing so, even if the inside of the drainage pipe joint is almost completely blocked by oils and fats, it can be easily removed. However, at the time of piping, although not shown, a lid is provided. In addition, a spare seat 18 for an inspection cleaning port, which can be used as an inspection cleaning port as required, is integrally provided at the bottom.

Next, a description will be given of a case in which the above-described double-track piping is performed by using the drain pipe joint according to the present embodiment, and the initial drain horizontal pipe D has been used for many years.

In this case, fats and oils and the like also adhere to the inside of the drain pipe joint 1. However, the drainage is mainly elbow L
Since a centrifugal force is applied due to the shape of the pipe such as a bent pipe or a bent pipe, the centrifugal force flows on one side (upward in FIG. 3) opposite to the side of the auxiliary pipe connection. Also, at the end of the riser tube side connection port 3, an enlarged diameter portion 8 is formed, and further, on one side of the spare pipe connection side, an expanded portion 13 is unevenly provided. Adhesion such as oil and fat separation to the swelling portion 13 is reduced as compared with other portions. That is, clogging is positively prevented at the expanded portion 13.

Therefore, even if the drainage horizontal pipe D on the side of the horizontal pipe connection port 2 is switched to the auxiliary pipe S, the drainage is discharged from the auxiliary pipe connection port 5 by the adhering substance formed by the above-described enlarged diameter portion 8 and expansion portion 13. It can flow smoothly through no space. In other words, if the drainage horizontal pipe D on the side of the horizontal pipe connection is clogged and switched to a new spare pipe S, the flow of drainage that does not hinder practical use can be secured, and the purpose of renewal can be achieved very easily. You can.

It is needless to say that the expanded portion 13 is unevenly distributed as much as possible, and that the cross section of the flow passage is preferably formed as large as possible as compared with that of the main pipe portion 4.

(Effect of the Invention) The drainage pipe joint according to the present invention is configured as described above. Therefore, using the above-mentioned double-track type piping,
If the drainage horizontal pipe at the horizontal pipe connection side is clogged, simply connect the drainage port of a drainage device such as a kitchen sink to the plugged-in portion of the spare pipe, and switch the piping to a new pipe. As a result, a flow of drainage that can be used for practical use can be secured, and the purpose of renewal can be achieved.

In other words, according to the drainage pipe joint according to the present invention, even if the pipe is clogged and cannot be repaired, it is possible to simply switch the pipe without any major work such as peeling off the floor.
The above-described double-track piping technique that can reasonably cope with pipe replacement can be easily put into practical use.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of a drainage pipe joint according to the present invention, FIG. 2 is a right side view thereof, FIG. 3 is a partially cutaway plan view thereof, and FIG. FIG. 4 is a sectional view taken along the arrow A in FIG. FIG. 5 is a partially cutaway plan view for illustrating the state of adhesion of oils and fats when a general 90 ° TY joint is used. DESCRIPTION OF SYMBOLS 1 ... Drainage pipe joint 2 ... Horizontal pipe connection port 3 ... Standpipe side connection port 4 ... Main pipe part 8 ... Large diameter part 13 ... Expansion part

Claims (1)

(57) [Claims] 1. One end is a horizontal pipe connection port of a drain horizontal pipe connected to a drainage device such as a kitchen sink, and the other end is a vertical pipe connection port for connection to a horizontal pipe connection port side of a drain vertical pipe joint. In the direction substantially perpendicular to the axial direction of the main tube portion, a spare tube connection port of a spare line of a drain horizontal tube connected to the drainage device is connected to the main tube portion formed in a straight tubular shape. Inside the end of the standpipe-side connection port, there is formed a diameter-enlarging section that expands in a tapered shape toward the downstream side, and furthermore, a connection section between the main pipe section and the spare pipe connection port. A drainage pipe characterized in that, on one side of the main pipe portion on the side of the spare pipe connection port at the standpipe side connection port, an expanded portion whose inner cross section is increased in a radial direction is unevenly provided. Fitting