JP2849906B2 - Sewage riser with trap - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewage tank provided with a U-shaped trap for sewage piping such as residential land, and more particularly to a trap made of synthetic resin.

[0002]

2. Description of the Related Art As is well known, a drainage basin with a cleaning port is installed at a junction of a sewer pipe, a bending point, a point where a slope or a pipe diameter changes. In case of domestic sewer pipe, FIG.
Are connected to the sewage main pipe 6 because a large number of branch pipes 5, 5,... Communicating with the flush toilet 1, the washroom 2, the bathtub 3, the kitchen 4, and the like are connected. It is necessary to install sewage tanks 8, 8,.

[0003] Recently, due to the narrowing of residential land, there is no longer a place for installing a conventional large sewage tank.
As shown in FIG. 0, a small-diameter sewage basin with a cleaning port is used as the sewage basin 8. A cleaning pipe 7 is set up at the cleaning port of each of the drainage basins with a cleaning port. In addition, among these drainage basins with a cleaning port, there is also a drainage basin 8a with a trap, which incorporates a trap function such as a U-shaped trap. The drainage basin 8a with a trap is so large that a trap cannot be separately provided. We install in narrow place of and use.

[0004] The U-shaped trap is a device provided in the sewage system, and has a water seal portion therein to prevent odor from flowing back into the room without obstructing the flow of sewage. It is a device that can do.

FIG. 8 shows an example of the sewage box 8a with a trap.
And with reference to FIG.
No. 8). The sewage box 8a with a trap has sewage main sockets 9 and 9 at both ends, and an invert portion 10 through which sewage flows is formed between the sockets 9 and 9. Above the invert portion 10, a connection tube 11 for connecting a cleaning pipe is formed. In addition, this sewage rise 8a
Is integrally formed with an elbow-shaped connecting pipe 12 protruding laterally, and a connecting port 13 at the tip thereof opens downward to the side of the invert section 10 via an overflow section 14. One end of a U-shaped trap 15 is rotatably connected to the connection port 13. The inflow-side end of the trap 15 is connected to the lower connection pipe of the branch pipe 16, and the sewage branch pipe 5 is connected to the connection pipe on the side of the branch pipe 16. The trap-side cleaning pipe 17 is connected to the upper connection cylinder of the branch pipe 16. Lids 18 and 19 are detachably attached to upper openings of the trap-side cleaning pipe 17 and the drainage-side cleaning pipe 7, respectively.

According to the sewage box 8a with a trap, the diameter R of the connecting tube 11 to which the cleaning pipe 7 is connected is formed smaller than the total size of the groove width W of the inverting portion 10 and the diameter r of the connection port 13. Therefore, the sewage tank 8a can be installed and used in a narrow place. In other words, although not shown in the drawing, the conventional large drainage basin with a trap has the diameter R of the connecting cylinder 11 and the groove width W of the invert portion 10 and the connecting port 1.
3 was larger than the total size of the diameter r, so this large sewage tank with a trap could not be installed and used in a narrow place. If the sewage box 8a with a trap is used, it can be installed in a narrow place.

[0007]

However, in the conventional sewage box 8a with a trap, when cleaning the sewage outflow side 15b of the trap 15, as shown in FIG.
Is opened, a flexible cleaning brush or the like is passed through the cleaning pipe 7 on the sewage riser side, and the tip of the brush or the like is moved to about 90 in the sewage riser 8a.
Bend through the connection pipe 12 on the side, and then bend about 90 degrees and feed downward into the sewage outflow side 15b of the trap 15, or open the lid 18 to trap the trap. A flexible brush or the like is passed through the side cleaning pipe 17, and the tip of the brush or the like is inserted into the sewage inflow side portion 15a of the trap 15 and is bent by about 180 ° so as to be directed upward and into the sewage outflow side portion 15b. Since it is necessary to send to
It has been very difficult to clean the inside of the sewage outflow side portion 15b at the back. As described above, it is very difficult to clean the inside of the sewage outflow side portion 15b, so that garbage and mud may be clogged in this portion.

The diameter R of the cleaning pipe connecting cylinder 11 is formed to be larger than the sum of the groove width W of the inverting portion 10 and the diameter r of the connecting port 13, and the brush is moved from the cleaning pipe 7 into the sewage outflow side portion 15b. However, in this case, the sewage box 8a may not be installed in a narrow place as described above.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a drainage basin with a trap which can be easily cleaned in a U-shaped trap and can be installed in a narrow place.

[0010]

According to a first aspect of the present invention, there is provided a sewage box with a trap having a cylindrical cleaning opening at an upper portion, a substantially horizontal bottom surface at a lower portion, and one side of the box body. An inflow connection tube and an outflow connection tube which are arranged linearly when viewed from above and open to the side surface of the box main body, and a U-shaped trap which is open to the bottom surface and biased to the other side of the box main body. The connected trap connection tube, and the flow path from the trap connection tube to the outflow connection tube leaving the inflow connection tube side edge of the trap connection tube side from the inflow connection tube side edge toward the outflow connection tube direction. It is characterized by comprising a dike projected on the bottom surface, and the lowermost part of the inflow connection tube is located at substantially the same height as the bottom surface.

In the sewage box with a trap according to the second aspect of the present invention, in the sewage box with a trap according to the first aspect of the present invention, the lowermost portion of the outlet connection tube is located at substantially the same height as the bottom surface. It is characterized by having.

According to a third aspect of the present invention, in the sewage box with a trap according to the first aspect of the present invention, the lowermost portion of the outlet connection tube is lower than the bottom surface. Things.

According to the first aspect of the present invention, the bottom surface of the box main body is formed substantially horizontally, and a trap connecting cylinder to which a U-shaped trap is connected is provided on the bottom surface, and the overflow section 11 shown in FIG. 8 is removed. By doing so, there is no obstacle to prevent the brush or the like from being fed into the trap when the inside of the U-shaped trap is cleaned from the cleaning opening of the sewage box through, for example, a flexible cleaning brush. The trap can be inserted substantially straight downward from the mouth into the outlet side of the trap. This makes it possible to clean the trap easily and reliably. And since the dike guides the sewage, mud, and sludge flowing from the inflow connection tube toward the outflow connection tube, it is possible to prevent such sewage from flowing into the trap connection tube. it can.
In addition, the sewage overflowing from the trap is discharged from the outlet connection tube through a flow path from the trap connection tube to the outlet connection tube.

According to the second aspect of the present invention, since the lowermost part of the outlet connection tube is located at substantially the same height as the bottom surface of the box body, the lowermost part of the outlet connection tube traps the cleaning brush. It does not become an obstacle when sending it inside.

According to the third aspect of the present invention, since the lowermost portion of the outlet connection tube is located lower than the bottom surface of the box body,
For example, mud or sludge flowing from the inflow connection tube quickly goes down the step and flows out of the outflow connection tube.
Thereby, it is possible to prevent mud and sludge from flowing into the U-shaped trap. Also, due to the step between the lowermost portion of the outlet connection tube and the bottom surface of the box body, the sewage flowing from the inlet connection tube and the sewage overflowing from the trap can be quickly discharged to the outlet connection tube side. However, it is possible to prevent the sewage from flowing backward from the outflow connection tube side into the inflow connection tube and the trap.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a sewage tank with a trap according to the present invention will be described with reference to the drawings. FIG. 3 is a plan view of the sewage box 21 with a trap according to the first embodiment.
The sewage box 21 with a trap is made of a synthetic resin such as ABS or vinyl chloride. Reference numeral 25 shown in FIG. The main body 25 has an inner diameter of about 166 mm at its upper part.
The connecting cylinder 25a of FIG.
The connecting tube 25a is used as a cleaning port and an inspection port by inserting the cleaning pipe 7 shown in FIG. Then, as shown in FIG. 3, the drain connection tube 25 b, which is biased toward one side of the box main body 25 and is linearly arranged when viewed from above, forms a water outlet for the sewage on each of the left and right side walls of the box main body 25. Inlet connecting tube 2 forming the inlet
5c is provided, and the drain main pipe 6 shown in FIG. 10 is inserted into each of the connection tubes 25b and 25c. A main passage 27 is formed between the connection tubes 25b and 25c.

Then, as shown in FIG.
A trap connecting tube 29 is provided at the bottom of the box main body 25 on the left side of 7, and one opening end of the U-shaped trap 30 is connected to a connection port 29 a formed by the trap connecting tube 29. This one open end forms the outlet 30a. The other open end of the U-shaped trap 30 is shown in FIG.
The trap cleaning pipe 17 and the branch pipe 5 are connected via a T-shaped branch pipe 16 in the same manner as the conventional one shown in FIG. The other open end forms the inflow port 30b.

As shown in FIG. 3, the trap-side flow path 3 extending from the trap connection cylinder 29 to the outlet connection cylinder 25b.
2, the inlet connection tube 2 on the trap connection tube 29 side.
The main body 2 extends from the side edge 5c toward the outlet connection tube 25b.
5 has a dike 26 projecting therefrom.
As shown in FIG. 1, the upper edge is formed as an inclined surface that becomes higher toward the inflow connection tube 25c.

Further, as shown in FIGS. 1 and 3, the U-shaped trap 30 is provided at the bottom of the box body 25 between the outlet end 26a of the dike 26 and the side wall of the box body 25. Trap-side flow path 32 from outlet 30a to main pipe-side flow path 27
Are formed. The trap-side flow path 32 is for allowing the sewage overflowing from the outflow port 30a through the U-shaped trap 30 to join the main pipe-side flow path 27 and drain to the outflow port connection tube 25b side.

As shown in FIGS. 1 and 2, the bottom surface of the box body 25 is formed substantially horizontally. That is, the lowermost part of the bottom of the trap-side flow path 32, the lowermost part of the bottom of the main-side flow path 27, and the trap-side flow path 32 and the main-side flow path 27
The lowermost part of the bottom surface of the confluence part 31 is formed horizontally at substantially the same height.

Next, the outlet 30a of the U-shaped trap 30
As shown in FIG. 2, an annular step 33 projecting in the diameter direction is provided on the outer peripheral surface of the side end portion. Every three engagement portions 34 are provided. By engaging these three engaging portions 34 with the step portions 33, the end of the U-shaped trap 30 on the outlet 30a side is prevented from coming off the trap connecting cylinder 29, and the U-shaped trap 30 is removed from the outlet 30a. It is rotatably supported as a center (see FIGS. 2 and 5). Three annular grooves are provided on the outer peripheral surface of the step portion 33, and O-rings 35 are attached to the upper and lower grooves, thereby maintaining the watertightness of the fitting portion. And the central groove is filled with a lubricant 36,
Thereby, the sliding in the circumferential direction between the outer peripheral surface of the step portion 33 and the trap connecting cylinder 29 is improved.

The inlet 30b of the U-shaped trap 30
Is about 15 mm higher than the height of the trap-side flow path 32 in order to secure the trap sealing depth.

Next, the operation of the sewage box 21 with a trap configured as described above will be described. This sewage box 21 with a trap is used in place of the sewage box 8a shown in FIG. That is, the cleaning pipe 7 is connected to the upper connection cylinder 25a,
The drain main pipe 6 is connected to the inlet / outlet connecting tubes 25c and 25b, and the T-shaped branch pipe 16 is connected to the inlet 30b of the U-shaped trap 30 similarly to the conventional one shown in FIG.
The trap cleaning pipe 17 and the branch pipe 5 are connected to the branch pipe 16 for use.

Now, for example, when the water in the washroom 2 shown in FIG. 10 is drained, the water flows into the main passage 27 of the sewage box 21 through the branch pipe 5 and flows out of the outlet connection cylinder 25b. And
Drained through the drain main 6. Further, when the water in the bathtub 3 is drained, the water passes through the branch pipe 5 and the U-shaped trap 30.
And overflows from the outlet 30a of the U-shaped trap 30, and the overflowed water flows into the main channel 27 through the trap channel 32 and flows out of the outlet connection tube 25b. It flows out and is drained through the drain mains 6. That is, the water discharged from the lavatory 2 is supplied to the inflow connection tube 25.
c into the main passage 27,
Can prevent the water from flowing to the outlet 30a of the U-shaped trap 30, and can allow the water to pass through the main pipe side flow path 27 to the outlet connecting cylinder 25b.
Therefore, mud and sludge flowing into the sewage tank 21 together with water are
The inflow into the outlet 30a of the trap 30 can be prevented.

Next, when cleaning the outlet 30a of the U-shaped trap 30 attached to the sewage box 21, the upper opening of the sewage box side cleaning pipe 7 connected to the connection tube 25a shown in FIG. For example, a flexible cleaning brush is passed through the outlet, and the tip of the brush is located substantially below the cleaning pipe 7 and the outlet 30 of the trap 30 opened upward.
What is necessary is just to insert in a. At this time, as shown in FIG.
by positioning the bottom of c to substantially the same height as the bottom of the boxes body 25, conventional sewage indicating the distance H ₁ between the lower edge of the connecting tube 25a and the bottom of the trap-side flow path 32 in FIG. 8 because it is longer than the distance of H ₂ squares 8a, apt to insert the brush than before the outlet 30a in the trap 30,
Therefore, cleaning is easy. That is, in the conventional sewage tank 8a shown in FIG. 8, since the overflow portion 14 exists,
The distance H ₂ is shorter than the distance H ₁ by the height of the overflow portion 14, and the brush is connected to the outlet 15 of the trap 15.
It was difficult to insert it into b.

When cleaning the inlet 30b of the trap 30, it is sufficient to insert the trap 30 through the upper opening of the trap-side cleaning pipe 17 into the inlet 30b through a flexible brush or the like. Of course, the inlet 30b and the outlet 30a of the trap 30 can be cleaned through the cleaning brush from the upper opening of the cleaning pipe 7 or 17.

According to the sewage box 21 with a trap, as shown in FIG. 2, a cleaning connection tube 25a (cleaning opening).
Is smaller than the sum of the groove width W of the main pipe side flow path 27 and the inner diameter r of the trap connection tube 29 (connection port 29a), so that the inside diameter R is connected to the cleaning connection tube 25a at the time of burying construction. The cleaning tube 7 to be used may be of a small diameter,
The embedding space can be reduced as compared with the case where a sewage box having a large-diameter cleaning port is buried in the related art.

Further, since the trap 30 is rotatably connected to the trap connecting tube 29, the trap 30 is rotated and adjusted, for example, as shown in FIG. The trapped sewer box 21 can be installed even in a considerably narrow place. And Trap 3
Since the position of the trap 30 and the branch pipe 5 can be easily adjusted by rotating and adjusting 0, the trap 30, the branch pipe 16, and the branch pipe 5 can be easily installed.

Next, a second embodiment of the present invention will be described with reference to FIGS. 6 and 7. FIG. The sewage cell 22 of the second embodiment differs from the sewage cell 21 of the first embodiment in that a step 43 is provided. Except for this, the second embodiment is the same as the first embodiment, and the same parts are denoted by the same reference numerals and the detailed description thereof will be omitted.

The step 43 is provided so that the lowermost part of the bottom surface of the outlet connection tube 25b is lower than the bottom surface of the box body 25. As shown in FIG. It is provided along the direction obliquely crossing the main pipe side flow path 27 from the connection pipe 25b side to the inflow connection pipe 25c. The step E of the step 43 is about 30 mm,
It is necessary to determine the dimensions according to the diameters of the inlet connection tube 25c and the outlet connection tube 25b. That is, the step E needs to be increased as the diameter increases.

Now, for example, when the water in the lavatory 2 shown in FIG. 10 is drained, it flows into the main pipe side flow path 27 of the sewage box 22 through the branch pipe 5 and the sewage main pipe 6 and flows out of the outlet connection pipe 25b. Although it flows out, as shown in FIG.
Diagonally, the sewage firstly flows from a portion of the step portion 43 that crosses diagonally near the side wall 39 of the main channel 27 on the opposite side of the trap 30, and thereby the sewage flows. The sewage flowing through the pipe side flow path 27 is trapped 30
Into the outflow port 30a.

When the water is simultaneously drained from various places in the house shown in FIG. 10, the sewage may flow backward in the drain main pipe 6, but the backflow is reduced by the step 43 provided in the sewage box 22. Bathtub 3
Such water can be quickly drained to a sewage main pipe (not shown) through the drain main pipe 6.

Also, as shown in FIG.
Since the opening is formed toward the outlet connection tube 25b, the sewage overflowing from the outlet 30a of the U-shaped trap 30 can be directed to the outlet connection tube 25b. Thereby, the outlet 30a of the U-shaped trap 30
The more overflowing sewage can be drained very quickly.

Further, since the sewage can be drained much more quickly than in the case of using the conventional sewage tank with a trap shown in FIG. 8, the flow rate of the sewage is higher than in the conventional case. It is difficult for mud or sludge to accumulate in the main pipe side flow path 27, the drain main pipe 6, and the branch pipe 5, and it is possible to prevent the flow path from being narrowed.

However, in the second embodiment, the dike 2
6, but the dike 42 may be omitted.

In the second embodiment, the step portion 4
3 is provided adjacent to the junction 31,
May be provided on the side approaching the outlet connection tube 25b with an interval from the junction 31.

[0037]

According to the first aspect of the present invention, the overflow portion 11 shown in FIG. 8, which is an obstacle when cleaning the inside of the U-shaped trap through a cleaning brush or the like from the cleaning opening provided in the sewage box, is removed. Since the trap has been removed, the inside of the trap can be easily and reliably cleaned, thereby preventing the trap from clogging at the outlet side of the trap, which has been a problem in the past. Can be cleaned for easy drainage.

Since the trap can be easily cleaned as described above, the inner diameter of the cleaning port is adjusted by changing the inner diameter of the cleaning port (the sewage formed between the inlet connection pipe and the outlet connection pipe). 8) and the inner diameter of the trap connecting cylinder can be formed smaller than the sum of the groove widths, thereby reducing the installation area of the trapped sewage tank as in the conventional case shown in FIG. be able to. As a result, there is an effect that the sewage tank with the trap can be installed and used in a narrow place.

Further, by providing the dike, it is possible to prevent, for example, mud or sludge flowing from the inlet connection tube from flowing into the U-shaped trap. The clogging of the trap can be prevented.

According to the second aspect of the present invention, since the lowermost part of the outlet connection cylinder is located at substantially the same height as the substantially horizontal bottom surface of the box body, the lowermost part holds the cleaning brush inside the trap. Therefore, there is an effect that the trap is not obstructed, so that the trap can be easily cleaned.

According to the third aspect of the present invention, since the lowermost portion of the outlet connection tube is located lower than the bottom surface of the box body,
For example, mud or sludge flowing from the inflow connection tube can be made to flow down from the outflow connection tube by lowering the stepped portion, thereby preventing the inflow into the U-shaped trap. Thereby, it is possible to prevent the trap from being clogged by the mud or sludge.

This step can prevent the sewage from flowing backward from the outflow connection tube to the inflow connection tube side or into the trap. For example, a large amount of sewage flows from each branch pipe 5 shown in FIG. When the water is discharged, it is possible to prevent the sewage from flowing back into each branch pipe 5 so that each branch pipe 5 is not filled with water, whereby drainage of the flush toilet 1, the washroom 2, the bathtub 3 and the like can be satisfactorily performed. There is an effect that can be.

In addition, since the drainage of each branch pipe 5, sewage box, and main pipe 6 can be improved in this way, the flow rate of sewage is relatively high, and as a result, each branch pipe 5, sewage box, ,
In addition, it is difficult for mud and sludge to accumulate in the main pipe 6, and it is possible to prevent the passage from being narrowed.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a sewage box with a trap according to a first embodiment of the present invention, as viewed from a direction AA in FIG.

FIG. 2 is a vertical cross-sectional view of the sewage box with a trap according to the first embodiment as viewed from the direction BB of FIG. 4;

FIG. 3 is a plan view of the sewage box with a trap according to the first embodiment.

FIG. 4 is a front view of the sewage box with a trap according to the first embodiment.

FIG. 5 is a plan view showing a state in which the U-shaped trap of the first embodiment has been rotated to the right position.

FIG. 6 is a longitudinal sectional view of the sewage tank with a trap according to the second embodiment of the present invention, as viewed from the direction of arrows CC in FIG. 7;

FIG. 7 is a plan view of a sewage box with a trap according to the second embodiment.

FIG. 8 is a longitudinal sectional view of a conventional drainage basin with a trap.

FIG. 9 is a plan view of the conventional drainage basin with a trap.

FIG. 10 is a perspective view of a conventional in-house pipe.

[Explanation of symbols]

 6 Drain main pipe 25 Square main body 25a Cleaning port connection pipe 25b Outflow port connection pipe 25c Inlet connection pipe 26 Flow guide bank 27 Main pipe side flow path 29 Trap connection pipe 29a Connection port 30 U-shaped trap 32 Trap side flow path 43 Step

Claims (3)

(57) [Claims] 1. A box body having a cylindrical cleaning opening at the top and a substantially horizontal bottom surface at the bottom, and one side of the box body biased toward one side and arranged linearly as viewed from above, An inlet connection tube and an outlet connection tube that are open, a trap connection tube that is biased to the other side of the box body and that is open to the bottom surface and that is connected to a U-shaped trap, and an outlet from the trap connection tube A flow dike projecting from the side edge of the inflow connection tube on the trap connection tube side toward the outflow connection tube direction, leaving a flow path toward the connection tube. A sewage tank with a trap, wherein the lowermost part of the connection tube is located at substantially the same height as the bottom surface. 2. The sewage tank with a trap according to claim 1, wherein a lowermost portion of the outlet connection tube is located at substantially the same height as the bottom surface. 3. The drainage tank with a trap according to claim 1, wherein a lowermost portion of the outlet connection tube is located lower than the bottom surface.