JPH0447041A - Catch-basin - Google Patents

Abstract

PURPOSE:To make the work easier by forming a catch-basin main body of a tube-form with the bottom and with the opening at the upper side, providing an inflow hole and two outflow holes projecting integrally at the side of the basin main body, inserting an inverted member to the basin main body, and providing a communicating passage to the inverted member. CONSTITUTION:A catch-basin main body 31 of a tube-form with the bottom and with the opening at the upper side is formed of a hard vinylchloride resin, and a bottom wall 32 and a peripheral wall 33 with a tapered surface are provided. And a cylindrical inflow hole 35 and the first and the second outflow holes 36 and 37 are formed at the peripheral wall 33 of the main body 31 integrally projecting to the outer side in the diameter direction. Then, an inverted member 41 being the member other than the main body is inserted in the main body 31, and a communicating passage 49 to communicate with one of the outflow holes 36 and 37 is formed to the inverted member 41. As a result, a renewal work can be made easily.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a drainage basin installed in a residential area or the like.

(Conventional technology) In homes in areas without public sewage systems, frozen ground is purified in a septic tank and then drained to a drainage destination such as a roadside gutter, and miscellaneous wastewater from kitchens, baths, etc. is discharged as is, or The wastewater is discharged through a gray water treatment tank. On the other hand, if public sewage systems are in service, all wastewater from households, including frozen ground, will be collected and discharged into the public sewage system. Therefore, drainage pipe piping is different depending on whether there is a public sewer system or not.

By the way, even in areas where public sewage systems are scheduled to begin service in the near future, if you are building a new house or other property before the start of public sewage service, it is necessary to install frozen land that requires a septic tank, as mentioned above. It is necessary to run separate pipes for this pipe and other pipes for gray water to the drainage destination such as a side gutter, but conventionally, the plumbing work for the drain pipes had to be redone once the public sewer system was put into service. Therefore, a method was adopted in which pipes were installed to collect wastewater from households and drain it into the public sewer system.

(Problem to be solved by the invention) However, in the conventional method, even though it is known that the public sewer system will be put into service soon, the piping work itself has to be redone, resulting in extra costs. This was extremely uneconomical.

The present invention is intended to solve such problems, and is used when it is known that public sewer service will begin service soon. The object of the present invention is to provide a drainage basin that can be easily and inexpensively switched between pipes.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, the drainage basin of claim 1 of the present invention is provided with a bottomed cylindrical tree body with an open top surface, and a drainage basin is provided on the side of the tree body. An inlet and two outflow ports are integrally provided, and an invert member, which is a separate member from the tree body, is fitted into the tree body, and the invert member has an inlet of the tree body and one flow outlet. A communication path is formed to communicate with the outlet.

In addition, in the drainage basin of the second aspect, both outflow ports of the tree body are provided in protruding positions symmetrically with respect to the inflow port.

(Function) The drainage basin according to claim 1 of the present invention is used when it is known that the public sewerage system will be put into service soon. The inlet of the tree body is connected to a drainage source such as a toilet via a drain pipe, the outlet of one side of the tree body is connected to a road gutter, etc. via a drainage pipe containing a septic tank, etc. Connect the outlet to the public example for public sewerage via a drain pipe. And, before the public sewerage system begins service,
An inlet of the tree body is communicated with the one outlet through a communication path of an invert member fitted into the tree body from its upper opening. In this state, the wastewater that has flowed in from the inlet will flow from the one outlet to the road gutter or the like via the septic tank, without flowing toward public facilities from the other outlet. Further, after the public sewer system is put into service, the inlet of the tree body is communicated with the other outlet through the communication path of the invert member fitted into the tree body from its upper opening. In this state, the wastewater that has flowed in from the inlet will not flow toward the one outlet (but will flow from the other outlet toward the public drain). When switching, the invert member may be replaced through the upper opening of the tree body, or the same invert member may be rotated.

In other words, if both the outflow ports are located symmetrically with respect to the inflow port as in the drainage basin of claim 2, the communication relationship between the inflow port and the two outflow ports can be established simply by rotating the invert member. can be switched. To explain in more detail, one end of the communication path of the invert member is aligned with the inlet, the other end of the communication path is aligned with one outlet, and the inlet communicates with one outlet. If the invert member is rotated by the angle formed by the outflow port, the other end of the communication path of the invert member will meet the inflow port, the one end of the communication path will meet the other outflow port, and the inflow port will connect to the other flow port. It will lead to the exit.

(Example) Hereinafter, one example of the drainage basin of the present invention will be described based on the drawings.

This drainage basin is used when it is known that the public sewer system will be put into service in the near future, such as six months or a year from now. , will be explained with reference to FIG.

In the figure, 1 is a residential area, 2 is a road, 3 is a side gutter, and 4 is a public example for public sewerage, and the outlet 41 of this public example 4 is
A mounting pipe 5 having a diameter of 15 o 11+1 is connected to.

A drain pipe 7 from a domestic toilet 6 is connected to a switching invert pipe 8, and this switching invert pipe 8 is connected to the side gutter 3 via a drain pipe 9. The septic tank 1o purifies sewage, and drainage basins II and +2 are installed before and after the septic tank 1o.

Further, a drain pipe 13 from a home kitchen or bath is connected to another switching invert pipe 14. and,
A drain pipe 15 from the switching invert basin 14 and a rainwater drain pipe 16 are connected to a drainage basin 17, and this drainage basin 17 is connected to the side gutter 3 via a drain pipe 18.

Further, a drain pipe 19.20 from the dual switching invert basin 8.14 is connected to a drainage basin 21, and this drainage basin 21 is connected to the inlet 4b of the public basin 4 via a drain pipe 22. There is.

Next, the double-switching invert basin 8.14, which is a drainage basin,
The configuration will be explained in detail with reference to FIGS. 1 to 4.

Reference numeral 31 denotes a barrel body, and the barrel body 31 is integrally molded from hard vinyl chloride resin into a bottomed cylindrical container shape with an open top surface, and becomes narrower toward the bottom with a bottom wall portion 32 on the lower side. The peripheral wall portion 33 has a tapered surface. Note that the opening on the upper surface of the peripheral wall portion 33 has a nominal diameter of, for example, 150 mm.

The upper opening of the barrel body 31 is a cylindrical cleaning port 34 that projects upward, and an annular stepped portion 34a is formed at the lower part of the inner peripheral surface of the cleaning port 34. . Furthermore, on the side part of the barrel body 31, that is, the peripheral wall part 33,
A cylindrical inlet 35, a first outlet 36, and a second outlet 37 are integrally formed and project outward in the radial direction. At the base of the inner peripheral surfaces of these inlet ports 35 and outlet ports 36 and 37, there are stepped portions 35M and 371 (the first outlet port 3
6 (not shown) are formed. In addition,
In the following description, the axial direction of the inlet 35 will be referred to as the front-rear direction.

Both of the outflow ports 36 and 37 are provided in protruding positions symmetrically with respect to the inflow port 35. To explain in more detail, both the outlet ports 36 and 37 are located symmetrically with respect to a vertical plane containing the central axis of the inlet port 35 as a plane of symmetry. Therefore, the angle α0 (for example, 135°) formed by both the outlet ports 36 and 37 with respect to the inlet port 35 is equal. Note that this angle α0 can be arbitrarily set other than the illustrated 135°.

Further, on the bottom wall portion 32 of the barrel body 31, a bulging portion 38 is provided.
is formed in the center, and a positioning protrusion 39
is formed on the inner peripheral surface of the peripheral wall portion 33.

4I is an invert member, and this invert member 41 is
It is integrally molded from synthetic resin or the like, and is a separate member from the barrel body 31, and is inserted into the barrel body 31 through its cleaning opening 34.

In the invert member 41, inner circumferential walls 43, 44 vertically rise from both left and right sides of the lower semicircular invert part 42, and are bent vertically from the upper edges of these inner circumferential walls 43, 44 to form a clay wall. 45 and 46 extend in opposite directions, and the outer peripheral wall 47 extends from the tip edge of the upper wall 45 and 46.
．． 48 hangs down, and the outer circumferential surfaces of the amphoteric circumferential wall portions 47 and 48, including the circumferential surface of the invert portion 42, have the same tapered surface as the inner circumferential surface of the circumferential wall portion 33 of the barrel body 31. Note that the adjacent inner circumferential walls 43 and 44 and outer circumferential walls 47 and 48 are connected at side edges.

The invert portion 42 and both inner peripheral wall portions 43° 44
The space surrounded by the inlet 35 is bent at an angle α0 formed by the outlet 36, 37 with respect to the inlet 35, and both ends are opened between the circumferential walls 47, 48, and the barrel body 31
A communication path 49 selectively communicates between the inlet 35 and one of the outlet ports 36 and 37.

Further, an annular protrusion 50 surrounding the bulging portion 38 of the barrel body 31 is formed at the center of the lower surface of the invert portion 42 . Further, a groove 51 is formed at the lower edge of the outer peripheral wall 47.4g or at the outer periphery of the invert section 42, with which the positioning protrusion 39 of the barrel body 31 is slidably engaged. This groove portion 51 extends slightly beyond the angle α0 formed by the outlet ports 36 and 37 with respect to the inlet port 35. The positional relationship between the positioning protrusion 39 and the concave groove 51 is such that when the positioning protrusion 39 comes into contact with one end of the concave groove 51, the one end opening 49& of the communicating path 49 is aligned with the inlet 35, and the communicating passage 49 is aligned with the inlet 35. The other end opening 49 of the passage 49
b is aligned with the first outlet 36 and the positioning protrusion 39 abuts the other end of the groove 51, the other end opening 49h
is aligned with the inlet 35, and the one end opening 491
is set to align with the second outlet 37.

Further, jig support portions 52 are integrally formed on the upper surface of the rain wall portions 45 and 46, and engagement holes 53 are formed in the jig support portions 52, respectively, around the invert member 41. It is formed to penetrate in the direction.

Next, the operation of the above embodiment will be explained.

In piping work at the time of new construction as described above, as shown in Fig. 9, the barrel body 31 of the switching invert box 8°14
is buried underground, and a drain pipe 7.13 from a household etc. is connected to the inlet 35 of this barrel body 31. At the same time, in the switching invert basin 8 on the left side of the figure, a drain pipe 9 to the side gutter 3 is connected to the first outlet 36 of the barrel body 31, and a second
A drain pipe 19 to the public basin 4 is connected to the outlet 37 of the drain pipe 19 . On the other hand, in the switching invert box 14 on the right side of the figure, the barrel body 31
Connect the drain pipe 15 to the side gutter 3 to the second outlet 37 of
A drain pipe 20 to the public basin 4 is connected to the first outlet 36. Although not shown, a cleaning port pipe from the ground surface is connected to the cleaning port 34 of the barrel body 31. The lower end of this pipe, in which a cleaning port main body having a removable lid is fitted to the upper end opening, is abutted against the stepped portion 34a of the cleaning port 34.

In addition, although the invert member 41 is fitted into the barrel body 31 in advance, at the time of initial construction, that is, before the start of service of the public sewerage system, the communication path 49 of the invert member 41 is inserted into the barrel body 31 as shown in FIG. 9 (1). Thus, the inlet 35 of the barrel body 31 communicates with the drain pipe 9.15 to the gutter 3. That is, in the switching invert box 8 on the left side of the figure, the inlet port 3 of the barrel body 31
Align one end opening 491 of the communication path 49 with 5, and
The other end opening 49b of the communication path 49 is aligned with the first outlet 36 to communicate the inlet 35 with the first outlet 36. On the other hand, in the switching invert box 14 on the right side of the figure, the barrel body 31
The other end opening 49b of the communication passage 49 is aligned with the inlet 35 of
91 to connect the inlet 35 to the second outlet 37. In this state, in the switching invert box 8 on the left side of the figure, the second outlet 37 of the barrel body 31 is connected to the invert member 4.
It is shielded and closed from the inside by the outer peripheral wall portion 47 of No. 1, and the conduit to the public basin 4 is temporarily fixed. On the other hand, in the switching invert basin 14 on the right side of the figure, the first outlet 36 of the barrel body 31 is blocked from the inside by the outer peripheral wall 47 of the invert member 41, and the conduit to the public basin 4 is temporarily closed. be done.

At the same time, the outlet 4a of the public basin 4 is closed off with a cap from the inside.

When used in this state, the switching invert box 8 on the left side of the diagram
Now, from the inlet 35 to the communication path 49 of the invert member 41
The frozen ground that has flowed into the septic tank 10 does not flow from the second outlet 37 toward the public basin 4 but from the first outlet 36 to the septic tank 10.
Flows into the side gutter 3 via. On the other hand, in the switching invert basin 14 on the right side of the figure, gray water that has flowed into the communication path 49 from the kitchen or bath via the inlet 35 does not flow from the first outlet 36 toward the public basin 4; The water flows from the outlet 37 of No. 2 to the side gutter 3.

When the public sewer system is put into service, the communication path 49 of the invert member 41 connects the inlet 35 of the barrel body 31 to the drain pipe 19.20 to the public basin 4, as shown in FIG. 9(b). communicate with. That is, in the switching invert box 8 on the left side of the figure, the communication path 4 is connected to the inlet 35 of the barrel body 31.
9 and one end opening 491 of the communicating path 49 is aligned with the second outlet 37. on the other hand,
In the switching invert box 14 on the right side of the figure, one end opening 49 of the communication path 49 is connected to the inlet 35 of the barrel body 31! At the same time, the other end opening 49b of the communication passage 49 is connected to the first outlet 36.
Match. In this state, in the switching invert basin 8 on the left side of the drawing, the first outlet 36 of the barrel body 31 is closed from the inside by the outer peripheral wall 47 of the invert member 41, and the pipeline to the septic tank 10 is closed. . On the other hand, in the switching invert box 14 on the right side of the figure, the second outlet 37 of the barrel body 31
is blocked and closed from the inside by the outer circumferential wall portion 47 of the invert member 41, and the pipeline to the side gutter 3 is closed.

At the same time, the outlet 41 of the public basin 4 is opened by removing the cap.

When used in this state, the switching invert box 8 on the left side of the diagram
Now, from the inlet 35 to the communication path 49 of the invert member 41
The frozen ground that has flowed into the septic tank 1θ from the first outlet 36
from the second outlet 37 to the public basin 4 without flowing towards the
flows to On the other hand, in the switching invert basin 14 on the right side of the figure, gray water that has flowed into the communication passage 49 through the inlet 35 from the kitchen or bath does not flow from the second outlet 37 toward the side gutter 3; The water flows from the outlet 36 to the public basin 4.

As mentioned above, when switching the outflow direction of the waste water from the barrel body 31 after the public sewer system has been put into service, a jig 6I as shown in FIG. 6 is used. This jig 61 includes a handle 63 provided at the upper end of a rod 62, and a pair of engagement protrusions 64 provided at the lower end of the rod 62. As shown in FIG. 6(b), these engaging protrusions 64 are both bent, for example, in a counterclockwise direction when viewed from above.

Then, remove the lid of the cleaning port body that is fitted onto the upper end of the cleaning port pipe connected to the cleaning port 34 of the barrel body 31, and insert the jig 61 into the cleaning port pipe from the ground. Both engaging protrusions 64 of this jig 61 are respectively engaged with the engaging holes 53 of both jig supporting parts 52 of the invert member 41.

After that, operate the jig 61 to slightly pull up the invert member 41 fitted into the barrel body 31, and then move the invert member 41 horizontally at a predetermined angle α0.
Rotate and then push the invert member 41 downward.

That is, both outlet ports 36 and 37 of the barrel body 31 are the inlet port 3.
5, one opening 49a of the communication passage 49 of the invert member 41 is aligned with the inlet 35, and the other opening 49b of the communication passage 49 is aligned with one of the outlet 36. Therefore, if the invert member 41 is rotated by the angle α0 formed by the inlet port 35 and both outlet ports 36 and 37, the other opening 49b of the communication path 49 of the invert member 41 is aligned with the inlet port 35, and the communication path 49
The one opening 49I is aligned with the other outlet 37.

At this time, in the switching invert box 8 on the left side of the drawing, the invert member 41 is rotated counterclockwise by an angle α0, and in the switching invert box 14 on the right side of the drawing, the invert member 41 is rotated counterclockwise by an angle α0.
1 by an angle α0 in the clockwise direction. therefore,
For the double switching invert box 8°14, the engaging protrusion 6
It is necessary to use a jig 61 in which the portions 4 are bent in opposite directions. Note that the jig 61 shown in FIG. 6 is for the switching invert box 8 on the left side of the figure.

However, any jig having two pairs of engaging protrusions bent in the clockwise direction and the counterclockwise direction can be used in both the switching invert boxes 8.14.

Further, when switching the outflow direction of the waste water from the barrel body 31 in this way, when the invert member 41 is rotated in a predetermined direction, the positioning protrusion of the barrel body 31 is formed at the end of the concave groove portion 51 of the invert member 41. When the portion 39 abuts from the circumferential direction, that is, the rotational direction, the invert member 41 is locked, and the openings 491 and 49b at both ends of the communication passage 49 are accurately connected to the inlet 35 and the predetermined outlet 36, 37 of the barrel body 31. It becomes a combined state.

The switching invert pits 8 and 14 are buried at a depth of about 10 CDI underground.
Although the invert member 4 is located deep underground, the invert member 41 can be easily and reliably operated from the ground using the jig 61 as described above.

In addition, in order to operate from the ground, a switching invert box 8.1
Although you can't see the inside of 4 very well, there is a concave groove 5 as mentioned above.
1 and the positioning protrusion 39, the barrel body 3
1 and the invert member 41 can be easily aligned, and switching can be performed more reliably.

Note that the structure for aligning the barrel body 31 and the invert member 41 is not limited to the one described above. It is also possible to form protrusions on the invert member 41 that are movable within the range between the protrusions.

Similarly, contrary to the embodiment described above, it is also possible to form a concave groove on the barrel body 31 and a protrusion on the invert member 11. Furthermore, the uneven relationship between the bulge 38 and the annular protrusion 50 can also be reversed.

Further, as shown in FIG. 5, for example, a pair of recesses 56 that open upwardly and are spaced apart by α0 are formed on the outer periphery of the lower surface of the barrel body 31, and the recesses 56 are selectively fitted into the recesses 56 from above. The protrusion 57 may be formed on the outer peripheral portion of the lower surface of the invert member 41. Of course, the relationship between the unevenness may be reversed.

In the case shown in FIG. 5, when switching the outflow direction of the waste water from the barrel body 31,
The engagement holes 53 of both jig support parts 52 of the invert member 41
First, lift the invert member 41 a little, and remove the invert member 4 from one recess 56 of the barrel body 31.
Pull out the protrusion 57 of No. 1 upward. Next, invert member 4
1 is rotated by α0, for example, and then the invert member 41 is pushed downward to fit the protrusion 57 into the other recess 56 from above.

In the structure shown in FIG. 4, the invert member 41 can only be rotated in one direction when switching the outflow direction, but according to the structure shown in FIG.
1 can be rotated in either direction. For example, in the switching invert box 8 on the left side of FIG. 9, when switching is performed with the start of service of the public sewer system, the invert member 41 may be moved counterclockwise by α0, or conversely, clockwise. It may be rotated by 360-α0 in the direction. Therefore, the left and right switching invert box 8.1 in FIG.
4, the same jig 61 shown in FIG. 6 can also be used. Furthermore, the rotation of the invert member 410 is reliably prevented.

However, in terms of operability, the one shown in FIG. 4 is actually better.

Note that the inner circumferential surface of the barrel body 31 and the outer circumferential surface of the invert member 41 are tapered surfaces, so by lifting the invert member 41, the invert member 41
The sliding resistance when rotating is reduced.

Furthermore, the structure for rotating the invert member 41 is not limited to that of the embodiment described above. For example, as shown in FIG. 7, a pair of engagement holes 58 opened upward are formed on the upper surface of the invert member 41 in place of the pair of jig support parts 52 of the above embodiment, and the jig 61 Alternatively, a device having a pair of engaging protrusions 66 hanging downward at the lower tip may be used.

In this case, when switching the outflow direction, the invert member 41 can simply be rotated by engaging the image body mating projections 66 of the jig 61 with the image body mating holes 61 of the invert member 41 from above. Therefore, this invert member 41 cannot be lifted. Therefore, it cannot be applied to what is shown in FIG. 5 above. However, since the invert member 41 can be rotated in both directions, the fourth
When applied to what is shown in the figure, the same jig 61 can be used for the left and right switching invert boxes 8 and 14 in FIG.

Note that if the dimensional relationship is set so that the pressure contact between the invert member 41 and the barrel body 31 is loose in order to facilitate the rotation operation of the invert member 41, there is a risk that liquid tightness will be impaired. Therefore, in order to reliably maintain liquid tightness, it is better to allow the invert member 41 to move up and down during the rotation operation.

Further, as shown in FIG. 8, the invert member 41 can be rotated using a water pipe 67 made of vinyl chloride resin and having an inner diameter of 13 mm, for example. To this end, a pair of cylindrical operation protrusions 59 that are fitted to the inner circumferential side of the water pipe 67 are integrally provided on the upper surface of the invert member 41, instead of the pair of jig support parts 52 of the embodiment described above. It is sufficient if it is installed protrudingly.

In this case, when switching the outflow direction, first apply adhesive to the inner peripheries of the tips of the pair of water pipes 67, and then
The tips of 7 are fitted into both operating projections 59 of the invert member 41 and bonded. Next, the upper end of the rainwater pipe 67 is grasped and pulled up, and the invert member 41 is rotated by a predetermined angle α0. Thereafter, the water pipe 67 is cut to an appropriate length and buried in the cleaning port 34 of the barrel body 31 and the cleaning port pipe above the cleaning port 34. In this way, the water pipe 67 will not get in the way even if it remains adhered to the invert member 41.

Furthermore, in the embodiment described above, the outflow direction is changed by rotating one invert member 41, but by replacing the invert member 41 through the cleaning port 34 of the barrel body 31, the outflow direction can be changed by rotating one invert member 41. It is also possible to have a structure in which the direction is switched. In this case, barrel body 3
An invert member 41 having a communication path 49 that connects the inlet 35 of the I to the first outlet 36, and an invert member 41 that connects the inlet 35 to the first outlet 36
An invert member 41 having a communication passage 49 communicating with the outlet 37 of the invert member 41 must be provided separately.

However, it is not necessary to position both outflow ports 36.37 symmetrically with respect to the inflow port 35, and due to design considerations, both outflow ports 36.
37 and the inlet 35 can be freely set.

On the other hand, according to the structure of the above embodiment in which both the outlet ports 36 and 37 are located symmetrically with respect to the inlet port 35, by simply rotating one invert member 41 within the barrel body 31, The communication relationship between the inlet 35 and the two outlet ports 36 and 37 can be switched, and two types of invert members 41 are available.
There is no need to provide a switch, which is advantageous in terms of manufacturing and also makes switching work easier.

Note that the structure of the present invention has a barrel body 31 with a nominal diameter of 150 m.
It can be applied to any drainage basin, regardless of its size.

Further, although the barrel body 31 is made of hard vinyl chloride resin, the invert member 41 may be made of any material other than vinyl chloride resin. It is also possible to make the material of the invert member 41 different from that of the barrel body 31 so that the invert member 41 can rotate smoothly. A material for this purpose is, for example, ABS resin.

In any case, according to the configuration, the switching invert box 8
．． 14 is installed, the outflow direction can be easily changed, so it can be used when it is known that the public sewer service will begin service soon, without having to redo the piping work itself. It is possible to easily and inexpensively switch between the pipeline before the start of service and the pipeline after the start of service. In other words, the switching operation can be performed from the ground, and the work of digging holes can be omitted, which is very economical.

〔Effect of the invention〕

According to the present invention, the following effects can be obtained.

In the drainage basin according to claim 1, an inlet and two outlets are integrally provided on the side of the barrel body whose top surface is open, an invert member is fitted into the tree body, and the invert member has an inlet and one outlet. Since we have created a communication path that connects the inlet to the outlet, if it is known that public sewerage will be put into service soon, it is necessary to connect the inlet to the drainage source in the home etc. during piping work when constructing a new house. One outlet should be connected to a road gutter, etc., and the other outlet should be connected to a public catch basin for public sewerage, and before the public sewerage service begins, the inlet should be connected to one outlet. Then, after the public sewer system begins service, by rotating the invert member within the tree body or replacing the invert member to connect the inlet to the other outlet, it is possible to connect the inlet to the other outlet without having to redo the piping work itself. , it is possible to easily and inexpensively switch between a pipeline before the start of public sewerage service and a pipeline after the start of service.

In addition, in the drain basin according to claim 2, both the outlet ports of the barrel body are provided in protruding positions symmetrically with respect to the inlet port, so that one
By simply rotating two invert members within the tree body, the communication relationship between the inlet and the two outlets can be switched, which is advantageous in manufacturing and also makes the switching work easier.

[Brief explanation of the drawing]

The drawings show an embodiment of the drainage basin of the present invention, and FIG. 1 is an overall plan view, and FIG. 2 is an A-P, -0- in FIG. 1.
3 is a sectional view along line B, FIG. 3 is a sectional view of the invert member along line P + P 2 in FIG. 1, FIG. 4 is a plan view of the barrel body, and FIG. 5 is another example of the barrel body. A plan view, FIG. 6(1) is a side view showing an example of a structure for rotating the invert member, and FIG. 6(b) is C, -C in FIG. 6(&)d. 7 is a side view showing another example of the structure for rotating the invert member; FIG. 8 is a side view showing still another example of the structure for rotating the invert member. , FIG. 9m, (b) is an explanatory plan view showing the piping relationship. 8.14...Switching invert basin which is a drainage basin, 3I...
Barrel body, 35... Inlet, 36... First outlet, 37
...Second outlet, 41...Invert member, 49...
Communication path.

Claims (2)

[Claims] (1) A bottomed cylindrical basin body with an open top surface, an inlet and two outlets integrally protruding from the sides of the basin body, and a separate member from the basin body inside the basin body. A drainage basin characterized in that an invert member is fitted therein, and a communication path is formed in the invert member to communicate an inlet of the basin body with one outlet. (2) The drainage basin according to claim 1, characterized in that both outflow ports of the basin body project at positions symmetrical to the inlet.