JP7274962B2 - drainage structure - Google Patents

Description

The present invention relates to drainage structures.

A structure is disclosed in which a water trap is provided in a waterproof pan used in a place where water-related equipment such as a washing machine is installed (see Patent Document 1). In this structure, the hose from the plumbing equipment is connected to the water sealing container of the drain trap (first channel). In addition, in preparation for the case where the hose is torn, a second flow path is provided that passes through the lid body and communicates with the sealed water container, in addition to the first flow path.

JP 2019-44522 A

However, in the siphon drainage system, even if the drainage flows into such a second channel, the force of pushing the drainage from the drainage trap to the horizontal pipe is weak because of the low head. On the other hand, it takes a certain amount of time before the siphon force starts to be generated in the horizontal draw pipe, and until then much waste water does not flow. For these reasons, there is a risk that air will accumulate in the flow path, and the waste water that has not completely entered the second flow path will overflow onto the waterproof pan. Raising the water head can be considered as a countermeasure, but simply increasing the water head would require a larger space under the floor in the height direction.

SUMMARY OF THE INVENTION It is an object of the present invention to suppress the height of a drain trap and allow the drain water that has passed through the water seal of the drain trap to flow smoothly into a siphon drain pipe.

A drainage structure according to a first aspect includes a drainage trap configured to store sealing water, a siphon drainage pipe connected downstream of the sealing water of the drainage trap, and the sealing water of the drainage trap. a vent pipe connected above the siphon drain pipe on the downstream side; a communication pipe connecting the vent pipe and the siphon drain pipe; a float valve that allows air in the pipe to flow bi-directionally to and from the drain pipe, allows waste water to pass from the vent pipe to the siphon drain pipe, and prevents waste water from passing from the siphon drain pipe to the vent pipe.

In this drainage structure, the air flows to the vent pipe without remaining in the downstream side of the sealed water in the drain trap, and even if waste water flows into the vent pipe, the waste water is discharged to the siphon drain pipe through the communicating pipe. be done. Therefore, it is possible to drain water from the ventilation pipe.

In addition, since a float valve is provided inside the communicating pipe, it is possible to discharge air from the siphon drain pipe to the vent pipe through the communicating pipe, and to drain air from the siphon drain pipe to the vent pipe through the communicating pipe. can suppress the inflow of

A second aspect is the drainage structure according to the first aspect, wherein the vent pipe has a low portion located at the boundary between a portion extending downward from a connection portion between the vent pipe and the drain trap and a portion extending upward again. and the communication tube is connected to the lower portion of the vent tube.

In this drainage structure, since the communicating pipe is connected to the lower portion of the vent pipe, even if waste water flows into the vent pipe, the waste water is easily discharged to the siphon drain pipe through the communicating pipe. Therefore, it is possible to efficiently drain water from the ventilation pipe.

A third aspect is the drainage structure according to the second aspect, in which a waterproof pan is provided on a floor material that is a plate-shaped member, and the upper part of the drainage trap is inserted into a penetration part provided in the floor material. and is connected to the waterproof pan, and the lower portion of the vent pipe overlaps the through portion when viewed from above.

In this drainage structure, the drainage trap is connected to the waterproof pan, and when viewed from the top, the lower part of the vent pipe overlaps the penetration part of the floor material, so the communicating pipe connected to the lower part is located near the drainage trap. Located in Therefore, it is possible to easily clean the communication pipe to which dirt easily adheres from the drain trap side.

A fourth aspect is the drainage structure according to the second aspect, in which a waterproof pan is provided on a floor material that is a plate-shaped member, and the upper part of the drainage trap is inserted into a penetration part provided in the floor material. and connected to the watertight pan, the floor material is provided with a notch opening to the penetration part within the installation range of the watertight pan, and the vent pipe passes through the notch to the upper part of the drain trap. and the lower portion of the vent pipe is provided in the portion without the notch and is connected to the communication pipe.

In this drainage structure, the vent pipe is connected through a notch provided in the floor material to a position including the upper part of the drainage trap inserted into the penetration part of the floor material. Therefore, interference between the ventilation pipe and the floor material can be suppressed.

Also, the lower portion of the vent pipe is provided in the portion without the notch and is connected to the communicating pipe. In other words, the distance from the drainage trap to the communication pipe is longer than when the lower portion of the vent pipe overlaps the penetration portion of the floor material. For this reason, the inflow of waste water into the ventilation pipe can be allowed to some extent.

A fifth aspect is the drainage structure according to the third aspect or the fourth aspect, wherein the vent pipe is connected to a position including the upper portion of the drainage trap inserted into the penetration portion, and the drainage trap comprises an outer cage to which the siphon drain pipe and the vent pipe are connected, an inner cage arranged inside the outer cage and capable of storing the sealing water, and an inner cage arranged inside the inner cage to form the sealing water. It has an inner cylinder, and the lower end of the inner peripheral surface of the siphon drain pipe is located at the height of the bottom of the outer cage.

In this drainage structure, the vent pipe is connected to a location of the drainage trap that includes the upper portion inserted into the penetration. Thereby, the vent pipe can be connected to a higher position of the drain trap while suppressing interference between the vent pipe and the plate-shaped member. Further, as a result, the vertical distance between the vent pipe and the siphon drain pipe is increased, so that the connecting position between the drain trap and the vent pipe is prevented from being clogged with the drain water that has passed through the sealing water. Therefore, the air downstream from the water seal in the drain trap flows into the vent pipe, and the air is prevented from remaining in the drain trap. In addition, since the vertical distance between the vent pipe and the siphon drain pipe increases, the water head also increases, so that the waste water that has passed through the sealing water can easily flow smoothly into the siphon drain pipe. Furthermore, by aligning the lower end of the inner peripheral surface of the siphon drain pipe with the height of the bottom of the outer car, the height of the drain trap can be further reduced.

According to the drainage structure of the present invention, it is possible to suppress the height of the drainage trap and allow the drainage that has passed through the water seal of the drainage trap to flow smoothly into the siphon drainage pipe.

It is a sectional view showing a drainage structure concerning a 1st embodiment. FIG. 4 is a cross-sectional view showing a float valve inside the communication pipe; It is a sectional view showing the drainage structure concerning a 2nd embodiment. It is a cross-sectional view showing a drainage structure according to a reference example. FIG. 4 is a cross-sectional view showing the internal structure of a drainage trap in a reference example; It is a perspective sectional view which shows the internal structure of an outer basket. It is a perspective sectional view which shows the internal structure of an outer basket. FIG. 4 is a perspective cross-sectional view showing a state in which the wall forming member is removed from the outer basket; FIG. 3 is a perspective view showing a wall-forming member; FIG. 11 is a perspective view showing the wall forming member viewed from another direction; FIG. 10 is a cross-sectional view showing an example in which the ventilation path is not opened downward in the reference example;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments for carrying out the present invention will be described based on the drawings.

[First embodiment]
In FIG. 1 , the drainage structure 10 according to the first embodiment has a drainage trap 12 , a lateral pipe 14 as an example of a siphon drainage pipe, and a vent pipe 16 .

Above the floor slab 18 of the building 17, a floor material 22, which is an example of a plate-like member, is provided horizontally. An underfloor space 24 is provided between the floor material 22 and the floor slab 18 . A waterproof pan 26 is provided on the floor material 22 . On the waterproof pan 26, a washing machine (not shown) or other equipment related to water is installed. The plumbing equipment and the drain trap 12 are connected by a hose 28 . By using the waterproof pan 26, even if the hose 28 is broken and the drainage leaks, the drainage can be received by the waterproof pan 26 and flowed to the drainage trap 12. - 特許庁A penetration portion 32 is formed in the floor material 22 . The drain trap 12 is connected to the waterproof pan 26 through the through portion 32 .

The drainage trap 12 is configured to be able to store the seal water 34 , and is installed by inserting the upper portion 41 A into the penetration portion 32 provided in the floor material 22 . Specifically, the drain trap 12 has an outer basket 41 , an inner basket 42 and an inner cylinder 43 . The upper portion 41A is a portion of the drain trap 12 that is positioned to overlap the floor material 22 in the horizontal direction when the upper end of the drain trap 12 is connected to the waterproof pan 26 .

The outer basket 41 is the outermost container of the drain trap 12 to which the lateral pipe 14 and the vent pipe 16 are connected. An upper portion 41A of the outer basket 41 is inserted into the through portion 32 of the floor material 22 . The outer basket 41 is in contact with the lower surface of the waterproof pan 26 . An annular mounting member 36 is arranged on the upper surface side of the waterproof pan 26 . A packing 38 is provided between the mounting member 36 and the waterproof pan 26 . The mounting member 36 can be screwed onto the threaded portion 41B of the outer car 41 (see FIGS. 6 to 8). A waterproof pan 26 is watertightly sandwiched between them. Thereby, the outer basket 41 is fixed to the lower surface of the waterproof pan 26 .

The inner basket 42 is a container arranged inside the outer basket 41 and capable of storing the sealing water 34 . A drain window 42A for determining the upper limit of the water level of the seal water 34 is formed through the outer peripheral surface of the inner cage 42 . The inner basket 42 is detachable from the waterproof pan 26 side to the inner side of the outer basket 41 through an opening (not shown) of the drain trap 12 that opens.

The inner cylinder 43 is a cylindrical member arranged inside the inner basket 42 and forming the sealing water 34 . The inner cylinder 43 is detachable from the waterproof pan 26 side to the inner side of the inner basket 42 through an opening (not shown) of the drain trap 12 that opens to the waterproof pan 26 . In the drainage trap 12, the drainage from the plumbing equipment flows into the inner cylinder 43 and mixes with the sealing water 34, and the drainage overflowing from the drainage window 42A of the inner basket 42 enters the outer basket 41 and flows into the horizontal pipe. 14 to the outside of the drain trap 12.

The horizontal pipe 14 is connected downstream of the water seal 34 of the drain trap 12 . This transverse pipe 14 is arranged horizontally, for example, on a floor slab 18 . The bottom of the outer basket 41 in the drain trap 12 is located near the top surface of the floor slab 18 . As a result, the lower end of the inner peripheral surface of the lateral pull pipe 14 is positioned at the height of the bottom of the outer cage 41 . A vertical pipe (not shown) extending downward from the building 15 is connected to the downstream end of the lateral pipe 14 . The lower end of this vertical pipe is connected to a drainage stack (not shown) that runs through each of the 15 floors of the building.

The vent pipe 16 is provided to suppress breakage of the sealing water 34 when a siphon force is generated. The vent pipe 16 is connected to a position on the downstream side of the water seal 34 of the drain trap 12 , above the horizontal pipe 14 and including the upper portion 41 A of the drain trap 12 . Specifically, the connecting portion 16A of the vent pipe 16 to the drain trap 12 is connected to the upper portion 41A of the outer basket 41 of the drain trap 12 that is inserted into the penetration portion 32 of the floor material 22 . In addition, the connecting portion 16A of the vent pipe 16 is connected across the upper portion 41A inserted into the through portion 32 and a portion not inserted into the through portion 32, in other words, a portion lower than the floor material 22. good too. The upper end of the connecting portion 16A is within the thickness of the floor material 22 . The lower end of the connecting portion 16A may be positioned lower than the floor material 22, but it is preferred that the lower end of the connecting portion 16A is within the range of the thickness so as to prevent the waste water remaining in the drain trap 12 from entering the vent pipe 16 as much as possible. preferable.

Vent pipe 16 has a portion (descent portion 16B) extending downward from connection portion 16A with drain trap 12 and a low portion 16D positioned at the boundary of a portion (main pipe portion 16C) extending upward again. A lower portion 16</b>D of the vent pipe 16 overlaps the through portion 32 when viewed from above. A main pipe portion 16</b>C of the vent pipe 16 is arranged at a height close to the floor material 22 in the underfloor space 24 . The main pipe portion 16C is inclined upward from the low portion 16D toward the rising portion 16E. This is to prevent the waste water from flowing to the downstream side of the vent pipe 16 when the waste water flows into the vent pipe 16 . A rising portion 16E extending upward, for example, is provided at the downstream end portion of the main pipe portion 16C of the vent pipe 16 . The rising portion 16E extends upward through the penetration portion 40 provided in the floor material 22 and the adjacent wall 44 .

As an example, the vent pipe 16 extends to the height of a water-related device such as a washing machine at the rising portion 16E, descends again, enters the underfloor space 24, and is connected to, for example, a drainage stack (not shown). It is

The ventilation pipe 16 and the lateral pipe 14 are connected by, for example, a communication pipe 50 extending in the vertical direction. The communication pipe 50 is connected to the lower portion 16D of the vent pipe 16. As shown in FIG. Since the lower portion 16D of the vent pipe 16 overlaps the penetration portion 32 when viewed from above, the upper end portion of the communication pipe 50 connected to the lower portion 16D also overlaps the penetration portion 32. As shown in FIG.

A float valve 52 is provided inside the communicating pipe 50 . The float valve 52 allows the air in the pipe to flow in both directions between the vent pipe 16 and the horizontal pipe 14, allows the drainage from the vent pipe 16 to the horizontal pipe 14, and allows the drainage from the horizontal pipe 14 to the ventilation pipe 16. configured not to pass. Specifically, as shown in FIG. 2 , a float 46 is provided inside the communicating pipe 50 . The density of the float 46 is less than that of air and greater than that of water. The float 46 thus rises against the wastewater and descends against the air. A support portion 48 is provided below the float 46 to prevent the float 46 from detaching downward from the communicating pipe 50 . Even when the float 46 is placed on the support portion 48, a gap is secured between the float 46 and the periphery of the support portion 48. - 特許庁Therefore, the air in the pipe can be bidirectionally passed between the ventilation pipe 16 and the horizontal pipe 14, and the waste water can be flowed from the ventilation pipe 16 to the horizontal pipe 14. - 特許庁On the other hand, a valve seat 54 is provided above the float 46 . When the float 46 is pressed against the valve seat 54 by the drainage that has flowed into the communication pipe 50 from the horizontal pipe 14, the space between the communication pipe 50 and the vent pipe 16 is blocked, and the drainage pipe 14 flows into the vent pipe 16. It is designed not to pass.

(Action)
This embodiment is configured as described above, and the operation thereof will be described below. In FIG. 1, in the drainage structure 10, the upper portion 41A of the drainage trap 12 is inserted into the penetration portion 32 provided in the floor material 22, and the vent pipe 16 is connected to a position including the upper portion 41A. Thereby, the ventilation pipe 16 can be connected to a higher position of the drain trap 12 while suppressing interference between the ventilation pipe 16 and the floor material 22 . Further, as a result, the vertical distance between the vent pipe 16 and the horizontal pipe 14 is increased, so that the connecting position between the drain trap 12 and the vent pipe 16 is prevented from being clogged with the drain water passing through the seal water 34. be. As a result, the air downstream of the water seal 34 in the drain trap 12 flows into the vent pipe 16 , and the air is prevented from remaining in the drain trap 12 . In addition, since the vertical distance between the vent pipe 16 and the horizontal draw pipe 14 is increased, the water head is also increased, so that the waste water passing through the sealing water 34 can easily flow smoothly into the horizontal pipe 14 .

Also, by aligning the lower end of the inner peripheral surface of the lateral pipe 14 with the height of the bottom of the outer basket 41, the height of the drain trap 12 can be further reduced.

Furthermore, since the vent pipe 16 and the lateral pipe 14 are connected by the communicating pipe 50, even if waste water flows into the vent pipe 16, the waste water is discharged to the lateral pipe 14 through the communicating pipe 50. - 特許庁Therefore, water can be drained from the vent pipe 16 .

Further, since the float valve 52 is provided inside the communicating pipe 50, air can be discharged from the horizontal pipe 14 through the communicating pipe 50 to the ventilation pipe 16, Inflow of waste water from 14 to vent pipe 16 can be suppressed.

Furthermore, since the communication pipe 50 is connected to the lower portion 16D of the ventilation pipe 16, even if waste water flows into the ventilation pipe 16, the waste water is easily discharged to the lateral pipe 14 through the communication pipe 50. Specifically, the waste water that has flowed into the descending portion 16B from the connection portion 16A of the vent pipe 16 and the waste water that has flowed into the main pipe portion 16C both gather in the lower portion 16D and are discharged to the horizontal pipe 14 through the communication pipe 50. . Therefore, water can be drained from the ventilation pipe 16 efficiently.

In addition, since the drain trap 12 is connected to the waterproof pan 26 and the low portion 16D of the vent pipe 16 overlaps the penetration portion 32 of the floor material 22 in top view, the communication pipe 50 connected to the low portion 16D is , located near the drain trap 12 . Therefore, it is possible to easily clean the communication pipe 50 to which dirt easily adheres from the drain trap 12 side.

As described above, according to the present embodiment, the height of the drain trap 12 is suppressed, and the drain passing through the sealing water 34 of the drain trap 12 is allowed to flow smoothly into the horizontal draw pipe 14 (siphon drain pipe). be able to.

[Second embodiment]
In FIG. 3 , in the drainage structure 20 according to the present embodiment, a notch 60 opening to the penetration portion 32 is provided in the flooring 22 within the installation range of the waterproof pan 26 . Vent pipe 16 is connected through notch 60 to a location including upper portion 41A of drain trap 12 . Specifically, the connecting portion 16A of the vent pipe 16 to the drain trap 12 is connected to the upper portion 41A of the outer basket 41 of the drain trap 12 that is inserted into the penetration portion 32 of the floor material 22 . In addition, the connecting portion 16A of the vent pipe 16 is connected across the upper portion 41A inserted into the through portion 32 and a portion not inserted into the through portion 32, in other words, a portion lower than the floor material 22. good too.

In FIG. 3, the notch 60 has a shape obtained by removing a part of the floor material 22 from the lower surface side. Since the upper surface side of the floor material 22 including the notch 60 is flat, it is suitable for supporting the waterproof pan 26 . In addition, the notch 60 has a flat portion 60A and an inclined portion 60C where the floor material 22 is thin. The inclined portion 60C is a portion that connects the flat portion 60A and the general portion 60B without the notch 60. As shown in FIG. The thickness of the floor material 22 changes at the inclined portion 60C. In addition, in the example shown in FIG. 3, the notch 60 does not penetrate the flooring 22 in the vertical direction, but it may be configured to penetrate the flooring 22 in the vertical direction.

The descending portion 16B of the vent pipe 16 is arranged along the inclined portion 60C of the notch 60. As shown in FIG. The vent pipe 16 is horizontally arranged from the connecting portion 16A to the front of the descending portion 16B. Note that this section may be sloped downward toward the descending portion 16B. The main pipe portion 16C is arranged at a height close to the floor material 22 and is arranged horizontally up to the rising portion 16E. Note that this section may be sloped downward toward the rising portion 16E.

A lower portion 16</b>D of the vent pipe 16 is provided in a portion without the notch 60 and connected to the communicating pipe 50 . In other words, the lower portion 16D of the vent tube 16 is positioned away from the notch 60 and away from the drain trap 12. As shown in FIG. In FIG. 3, the lower portion 16D of the vent tube 16 is provided directly below the raised portion 16E. The communication pipe 50 is also provided directly below the rising portion 16E. A float valve 52 (see FIG. 2) similar to that of the first embodiment is provided inside the communicating pipe 50 .

Since other parts are the same as those of the first embodiment, the same parts are denoted by the same reference numerals in the drawings, and the description thereof is omitted.

(Action)
This embodiment is configured as described above, and the operation thereof will be described below. In FIG. 2, in the drainage structure 20, the vent pipe 16 is connected through a notch 60 provided in the flooring material 22 to a position of the drainage trap 12 including the upper part 41A inserted into the penetration part 32 of the flooring material 22. ing. Therefore, interference between the ventilation pipe 16 and the floor material 22 can be suppressed.

A lower portion 16</b>D of the vent pipe 16 is provided in a portion without the notch 60 and connected to the communicating pipe 50 . That is, the distance from the drain trap 12 to the communication pipe 50 is longer than when the low portion 16D of the vent pipe 16 overlaps the penetration portion 32 of the floor material 22 . Therefore, the inflow of waste water into the ventilation pipe 16 can be allowed to some extent.

[Reference example]
In FIG. 4, in the drainage structure 30 according to the reference example, a ventilation passage 70 is formed inside the outer basket 41 of the drainage trap 12, communicating with the ventilation pipe 16 and extending upward to the height of the floor material 22. ing. As an example, the air passage 70 is formed between the inner surface of the outer basket 41 and a first wall portion 71 spaced apart from the inner surface. Also, the air passage 70 extends upward from the inside of the connection position 41</b>C of the air pipe 16 in the outer car 41 . A communication path 58 connects the air passage 70 and the inner portion 56 of the connection position 41</b>D of the horizontal pull pipe 14 in the outer basket 41 . The communication path 58 is formed between the inner surface of the outer car 41 and a second wall portion 72 spaced apart from the inner surface.

The width of the air passage 70 is smaller than the width of the communication passage 58 in the radial direction of the outer car 41 . The first wall portion 71 and the second wall portion 72 are connected and connected by an inclined wall portion 73 inclined with respect to the vertical direction of the outer car 41 . The first wall portion 71 , the inclined wall portion 73 and the second wall portion 72 are integrally formed as a wall forming member 74 , for example. This wall forming member 74 is removable from the outer basket 41 .

As shown in FIG. 8, the inner surface of the outer car 41 is provided with a guide rail 76 extending vertically and having, for example, an L-shaped cross section. A pair of guide rails 76 are provided. Further, as shown in FIG. 9, the wall forming member 74 is provided with a fitting portion 78 that slides along the guide rail 76 and fits into the guide rail 76 . By sliding the fitting portion 78 vertically along the guide rail 76 , the wall forming member 74 can be attached to and detached from the outer car 41 .

The mounting direction of the wall forming member 74 with respect to the outer car 41 is not limited to the vertical direction, and may be the radial direction. As an example, a hook portion (not shown) protruding radially inward may be provided on the inner surface of the outer cage 41, and the fitting portion 78 of the wall forming member 74 may be fitted into the hook portion. good. In this case, the wall forming member 74 can be attached to and detached from the outer car 41 in the radial direction. In addition, the hook may be formed in a cross-sectional arrow shape or a one-sided arrow shape. Moreover, the material of the wall forming member 74 may be an elastic material such as silicon rubber.

As shown in FIGS. 5 to 7 , a canopy 64 is provided at the upper end of the ventilation path 70 to block the upward opening of the ventilation path 70 . As shown in FIGS. 8 and 9, the eaves 64 are formed integrally with, for example, the upper end of the first wall portion 71 via a plurality of support portions 67 . The canopy 64 opens the air passage 70 radially inward of the outer car 41 .

4 and 5, a float valve 62 is provided inside the communication passage 58. As shown in FIG. The float valve 62 allows air in the pipe to pass bi-directionally between the vent passage 70 and the inner portion 56 and allows waste water to pass from the vent passage 70 to the inner portion 56 and not to pass from the inner portion 56 to the vent passage 70. is configured as Specifically, a float 66 is provided inside the communication path 58 . The density of the float 66 is greater than that of air and less than that of water. The float 66 thus rises against the waste water and descends against the air. A support portion 68 is provided below the float 66 to prevent the float 66 from detaching downward from the communication passage 58 . Even when the float 66 is placed on the support portion 68, a gap is secured between the float 66 and the periphery of the support portion 68. - 特許庁Therefore, the air in the pipe can pass in both directions between the air passage 70 and the inner portion 56 , and the drainage can flow from the air passage 70 to the inner portion 56 . On the other hand, a valve seat 84 is provided above the float 66 . When the float 66 is pressed against the valve seat 84 by the waste water flowing into the communicating passage 58 from the inner portion 56, the space between the communicating passage 58 and the air passage 70 is closed, preventing the passage of waste water from the inner portion 56 to the air passage 70. It's like

The air passage 70 and the inner portion 56 of the outer car 41 where the lateral pull pipe 14 is connected are connected by the communication passage 58. However, as shown in FIG. 11, the communication passage 58 is omitted. However, the air passage 70 may be configured to be open only upward and not open downward. Moreover, as shown in FIG. 11, the configuration may be such that the eaves 64 shown in FIG. 5 are omitted. In this case, the upper end of the air passage 70 may be positioned above the drain window 42A of the inner car 42. This is because it becomes difficult for the drainage that has passed through the seal water 34 and flows out from the drainage window 42A to flow into the ventilation path 70 .

Since other parts are the same as those of the first embodiment or the second embodiment, the same parts are denoted by the same reference numerals in the drawings, and descriptions thereof are omitted.

(Action)
This reference example is configured as described above, and its operation will be described below. 4 and 5, in the drainage structure 30, a ventilation passage 70 is formed inside the outer basket 41 of the drainage trap 12, communicating with the ventilation pipe 16 and extending upward to the height of the floor material 22. Therefore, even if the ventilation pipe 16 is arranged at a position that does not interfere with the floor material 22, the drainage that has passed through the sealing water 34 is prevented from clogging the ventilation pipe 16.例文帳に追加As a result, the air downstream of the seal water 34 in the drain trap 12 is smoothly exchanged, and the air flows into the vent pipe 16 . Therefore, the air is prevented from remaining downstream of the sealing water 34 in the drain trap 12 .

In addition, the air passage 70 and the inner portion 56 of the outer car 41 at the connection position of the horizontal pull pipe 14 are connected by the communication passage 58, and the float valve 62 is provided inside the communication passage 58, so that the communication passage Air can be discharged from the inner portion 56 through the communication passage 58 to the air passage 70, and the inflow of waste water from the inner portion 56 through the communication passage 58 into the air passage 70 can be suppressed. Also, even if waste water flows into the ventilation passage 70 , the waste water is discharged from the inner portion 56 to the lateral pipe 14 through the communication passage 58 .

Furthermore, since the canopy 64 is provided at the upper end of the ventilation path 70 to block the upward opening of the ventilation path 70 , the drainage that has passed through the sealing water 34 is suppressed from flowing into the ventilation path 70 . As a result, an air passage from the air passage 70 to the air pipe 16 is ensured, so that air is prevented from remaining downstream of the water seal 34 in the drain trap 12 .

Further, in the drainage structure 30 , the width of the air passage 70 is smaller than the width of the communication passage 58 in the radial direction of the outer car 41 . Also, the first wall portion 71 of the air passage 70 and the second wall portion 72 of the communication passage 58 are coupled and connected by an inclined wall portion 73 inclined with respect to the vertical direction of the outer car 41 . Therefore, by installing the inner basket 42 along the inclined wall portion 73 from the first wall portion 71 in the drain trap 12, the capacity of the inner basket 42 can be secured. Therefore, the height dimension of the drain trap 12 can be made compact.

Furthermore, in this drainage structure, the first wall portion 71, the inclined wall portion 73, and the second wall portion 72 are integrally formed, for example, as a wall forming member 74, which can be removed from the outer basket 41. Removal of 74 from outer basket 41 facilitates cleaning of drain trap 12 .

[Other embodiments]
An example of the embodiment of the present invention has been described above, but the embodiment of the present invention is not limited to the above, and can be modified in various ways without departing from the spirit of the present invention. Of course there is.

Further, it is also possible to appropriately combine the above embodiment and the reference example.

10... Drainage structure, 12... Drainage trap, 14... Horizontal pipe (siphon drain pipe), 16... Vent pipe, 16A... Connection part, 16B... Descending part (downward extending part), 16C... Main pipe part (upward part), 16D...low part, 20...drainage structure, 22...floor material (plate-shaped member), 26...waterproof pan, 30...drainage structure, 32...penetration part, 34...water seal, 41...outer basket, 42... Inner cage 43 Inner cylinder 50 Communicating pipe 52 Float valve 60 Notch

Claims (5)

a drainage trap configured to store sealing water;
a siphon drain pipe connected downstream of the sealing water of the drain trap;
a vent pipe connected above the siphon drain pipe on the downstream side of the water seal of the drain trap;
a communicating pipe that connects the vent pipe and the siphon drain pipe;
Provided inside the communication pipe, the air in the pipe is passed bidirectionally between the vent pipe and the siphon drain pipe, the waste water is passed from the vent pipe to the siphon drain pipe, and the communication from the siphon drain pipe a float valve that prevents drainage from entering the trachea;
Drainage structure with the vent pipe has a lower portion located at the boundary of a portion extending downward from the junction of the vent pipe and the drain trap and a portion extending upward again;
2. The drainage structure according to claim 1, wherein said communicating pipe is connected to said lower portion of said vent pipe. A waterproof pan is provided on the floor material, which is a plate-shaped member,
an upper portion of the drain trap is inserted into a penetration portion provided in the floor material and connected to the waterproof pan;
3. The drainage structure according to claim 2, wherein the lower portion of the vent pipe overlaps the through portion when viewed from above. A waterproof pan is provided on the floor material, which is a plate-shaped member,
an upper portion of the drain trap is inserted into a penetration portion provided in the floor material and connected to the waterproof pan;
The floor material is provided with a notch opening to the penetration part within the installation range of the waterproof pan,
the vent pipe is connected to a position including the upper portion of the drainage trap through the notch;
3. The drainage structure according to claim 2, wherein the lower portion of the vent pipe is provided in the portion without the notch and connected to the communication pipe. The vent pipe is connected to a position of the drain trap that includes the upper part inserted into the penetration part,
The drain trap includes an outer cage to which the siphon drain pipe and the vent pipe are connected, an inner cage arranged inside the outer cage and capable of storing the sealed water, and an inner cage arranged inside the sealed water. having an inner cylinder that forms a
5. The drainage structure according to claim 3, wherein the lower end of the inner peripheral surface of the siphon drainage pipe is positioned at the height of the bottom of the outer cage.

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