TWI834896B - Drainage structure - Google Patents

Abstract

A drainage structure 10 includes: a drainage trap 12 that is configured to be capable of storing sealing water 34, an upper portion 41A of the drainage trap 12 being inserted into a penetrating portion 32 provided at a floor material 22; a horizontal pipe 14 that is connected to the drainage trap 12 on a downstream side of the sealing water 34; and an air pipe 16 that is connected to the drainage trap 12 on the downstream side of the sealing water 34, at a position that is further upward than the horizontal pipe 14 and that includes the upper portion 41A of the drainage trap 12.

Description

Drainage structure

The present disclosure relates to a drainage structure.

Japanese Patent Application Laid-Open No. 2019-44522 discloses a structure in which a drainage trap is provided on a waterproof pan used in an installation location of water-using equipment such as a washing machine. In this structure, the hose from the water machine is connected to the water seal container of the drainage trap (first flow path). In addition, to prevent the hose from rupturing, a second flow channel that is different from the first flow channel and penetrates the cover body to be connected to the water-sealed container is provided.

However, in a siphon drainage system, even if the drainage flows into this second flow path, the force pushing the drainage from the drainage trap toward the horizontal pipe will be weak due to the low water head. On the other hand, it takes a certain amount of time before the horizontal pipe starts to generate siphon force, and until then, the drainage water cannot flow in large amounts. Due to the above reasons, there is a risk that air will accumulate in the flow channel and drain water that has not entered the second flow channel will overflow on the waterproof pan. As a countermeasure, it was considered to increase the water head, but simply increasing the water head would require a large space depending on the height direction under the floor.

The purpose of this disclosure is to suppress the height of the drainage trap and at the same time allow the drainage that has passed through the water seal of the drainage trap to flow smoothly to the siphon drainage pipe.

The drainage structure of the first aspect includes: a drainage trap configured to store a water seal and installed by inserting an upper part into a through-portion provided in a plate-like member; and a siphon drainage pipe connected to a relatively small The water seal downstream side of the drainage trap; and a vent pipe connected to the water seal downstream side of the drainage trap and above the siphon drainage pipe and containing the drainage trap The position of the upper part.

In this drainage structure, the upper part of the drainage trap is inserted into the penetration part provided in the plate-shaped member, and the ventilation pipe is connected to the position including this upper part. Thereby, it is possible to connect the breather pipe to a higher position of the drainage trap while suppressing interference between the breather pipe and the plate-shaped member. In addition, this increases the vertical distance between the vent pipe and the siphon drain pipe, thereby suppressing the connection position between the drain trap and the vent pipe from being clogged by drain water that has passed through the water seal. Therefore, the air on the downstream side of the water seal in the drainage trap can be caused to flow into the vent pipe, and the air can be suppressed from being retained in the drainage trap. In addition, by increasing the vertical distance between the breather pipe and the siphon drain pipe, the water head also becomes larger, so the drain water that has passed through the water seal can easily flow smoothly into the siphon drain pipe.

A second aspect is the drainage structure of the first aspect, wherein the drainage trap has an outer basket connected to the siphon drain pipe and the vent pipe, is disposed inside the outer basket, and can store the water seal. The inner basket and the inner cylinder arranged inside the inner basket and forming the water seal; the lower end of the inner peripheral surface of the siphon drainage pipe is located at the height of the bottom of the outer basket.

In this drainage structure, by making the lower end of the inner circumferential surface of the siphon drainage pipe consistent with the height of the bottom of the outer basket, the height of the drainage trap can be further suppressed.

In a third aspect, in the drainage structure of the first aspect or the second aspect, the vent pipe and the siphon drainage pipe are connected through a communication pipe.

In this drainage structure, even if the drainage flows into the vent pipe, the drainage will be discharged to the siphon drainage pipe through the communication pipe. Therefore, the breather tube can be dewatered.

In the fourth aspect, in the drainage structure of the third aspect, a float valve is provided inside the communication pipe, and being connected between the ventilation pipe and the siphon drainage pipe allows the air in the pipe to flow in both directions, and Drainage will flow from the vent pipe to the siphon drain pipe, but drainage will not flow from the siphon drain pipe to the vent pipe.

In this drainage structure, since a float valve is provided inside the communication pipe, air can be discharged from the siphon drainage pipe connected to the communication pipe to the ventilation pipe, and drainage from the siphon drainage pipe connected to the communication pipe to the ventilation pipe can be suppressed. inflow.

A fifth aspect is the drainage structure of the third or fourth aspect, wherein the vent pipe has a portion extending downward from the connection portion of the vent pipe and the drainage trap and a portion pointing upward again. The lower part of the boundary of the part; the communication pipe is connected to the lower part of the vent pipe.

In this drainage structure, since the communication pipe is connected to the lower part of the ventilation pipe, even if the drainage flows into the ventilation pipe, the drainage will be easily discharged to the siphon drainage pipe through the communication pipe. Therefore, the vent pipe can be drained efficiently.

The sixth aspect is the drainage structure of the fifth aspect, the plate-like member is a floor material; a waterproof pan is provided on the floor material; the drainage trap is connected to the waterproof pan; when viewed from above , the lower portion of the vent pipe will overlap the through portion.

In this drainage structure, since the drainage trap is connected to the waterproof pan; when viewed from above, the lower part of the vent pipe overlaps the through-portion, so the communication pipe connected to the lower part will be located near the drainage trap. Therefore, the communication pipe where dirt is likely to adhere can be easily cleaned from the drain trap side.

According to the drainage structure of the present disclosure, the height of the drainage trap can be suppressed and at the same time, the drainage that has passed through the water seal of the drainage trap can flow smoothly to the siphon drainage pipe.

Hereinafter, a mode for implementing the present disclosure will be described based on the drawings. Components shown using the same symbols in each drawing mean the same component. In addition, in the embodiments described below, overlapping descriptions and symbols may be omitted.

[First Embodiment] In FIG. 1 , the drainage structure 10 of this embodiment includes a drainage trap 12 , a horizontal pipe 14 as an example of a siphon drainage pipe, and a vent pipe 16 .

A floor material 22 as an example of a plate-shaped member is provided horizontally above the floor slab 18 of the building 17 . 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 . A water machine such as a washing machine (not shown) is installed on the waterproof pan 26 . The water machine and the drainage trap 12 are connected by, for example, a hose 28 . By using the waterproof pan 26, even if the hose 28 breaks and causes drain leakage, the waterproof pan 26 can still receive the drain and allow it to flow toward the drain trap 12. The floor material 22 is formed with a penetration portion 32 . The drainage trap 12 will be connected to the waterproof pan 26 through the through portion 32 .

The drainage trap 12 is configured to store a water seal 34 . This drainage trap 12 is installed by inserting the upper part 41A into the through-hole 32 provided in the floor material 22 . Specifically, the drainage trap 12 has an outer basket 41, an inner basket 42, and an inner tube 43. The upper portion 41A is a portion of the drainage trap 12 that overlaps the floor material 22 in the horizontal direction when the upper end of the drainage trap 12 is connected to the waterproof pan 26 .

The outer basket 41 is the outermost container of the drainage trap 12 to which the horizontal pipe 14 and the ventilation pipe 16 are connected. The 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 side of the waterproof pan 26 . A gasket 38 is provided between the mounting member 36 and the waterproof pan 26 . The mounting member 36 can be screwed into the threaded portion 41B of the outer basket 41 (refer to FIGS. 6 to 8 ). By screwing the mounting member 36 into the threaded portion 41B of the outer basket 41 , the waterproof pan 26 will be sandwiched in watertightly. between the liner 38 and the outer basket 41. Thereby, the outer basket 41 will be fixed below the waterproof pan 26 .

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

The inner cylinder 43 is disposed inside the inner basket 42 and is a cylindrical member that forms the water seal 34 . This inner cylinder 43 is detachable from the waterproof pan 26 side toward the inside of the inner basket 42 through an opening (not shown) of the drain trap 12 opened in the waterproof pan 26 . In the drainage trap 12, the drainage from the water machine will flow into the inner cylinder 43 and mix with the water seal 34, and the drainage overflowing from the drainage window 42A of the inner basket 42 will enter the outer basket 41, and then pass through the horizontal pipe 14 And discharged to the outside of the drainage trap 12.

The horizontal pipe 14 is connected to the downstream side of the water seal 34 of the drainage trap 12 . This horizontal pipe 14 is arranged horizontally on the floor 18, for example. The bottom of the outer basket 41 of the drainage trap 12 is located near the top of the floor 18 . As a result, the lower end of the inner peripheral surface of the horizontal tube 14 will be located at the height of the bottom of the outer basket 41 . A vertical pipe (not shown) extending below the building 17 is connected to the downstream end of the horizontal pipe 14 . The lower end of this vertical pipe is connected to a drainage pipe (not shown) that runs through each floor of the building 17 .

The vent pipe 16 is provided to prevent the water seal 34 from being broken when the siphon force occurs. The vent pipe 16 is connected to a position downstream of the water seal 34 of the drainage trap 12 and above the horizontal pipe 14 and including the upper part 41A of the drainage trap 12 . Specifically, the connection portion 16A of the vent pipe 16 to the drainage trap 12 is connected to the outer basket 41 of the drainage trap 12 and inserted into the upper portion 41A of the through-portion 32 of the floor material 22 . In addition, the connecting portion 16A of the vent pipe 16 may be 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 . The upper end of the connecting portion 16A is located within the thickness range of the floor material 22 . Although the lower end of the connecting portion 16A may be located lower than the floor material 22, from the viewpoint of preventing the drainage retained in the drainage trap 12 from entering the vent pipe 16, it is preferably located within a thickness range.

The vent pipe 16 has a lower portion located at the boundary between a portion extending downward from the connection portion 16A with the drainage trap 12 (that is, the descending portion 16B) and a portion that faces upward again (that is, the main pipe portion 16C) 16D. When viewed from above, the lower portion 16D of the vent pipe 16 overlaps the through portion 32 . The main pipe portion 16C of the ventilation pipe 16 is arranged in the underfloor space 24 at a height close to the floor material 22 . The main tube portion 16C is provided with an ascending gradient from the lower portion 16D toward the ascending portion 16E. The reason for this is to prevent the drainage from flowing into the vent pipe 16 to the downstream side of the vent pipe 16 . For example, an ascending portion 16E extending upward is provided at the downstream end portion of the main pipe portion 16C of the vent pipe 16 . The rising portion 16E passes between the through portion 40 provided on the floor material 22 and the adjacent wall 44 and extends upward.

Furthermore, as an example, after the ascending portion 16E extends to the height of a water machine such as a washing machine, the vent pipe 16 descends again and enters the underfloor space 24, and is connected to, for example, a drain pipe (not shown).

The vent pipe 16 and the horizontal pipe 14 are connected by, for example, a communication pipe 50 extending in the up and down direction. The communication tube 50 is connected to the lower portion 16D of the vent tube 16 . In a plan view, the lower portion 16D of the vent pipe 16 overlaps the through portion 32 , so the upper end of the communication tube 50 connected to the lower portion 16D is also located at a position overlapping the through portion 32 .

A float valve 52 is provided inside the communication pipe 50 (see FIG. 2 ). The float valve 52 is configured between the vent pipe 16 and the horizontal pipe 14 to allow the air in the pipe to flow in both directions, and to allow the drain water to flow from the vent pipe 16 to the horizontal pipe 14 without causing the drain water to flow from the horizontal pipe 14 to the horizontal pipe 14 . The breather tube 16 circulates. Specifically, as shown in FIG. 2 , a float 46 is provided inside the communication pipe 50 . The density of the float 46 is greater than that of air and less than that of water. Therefore, the float 46 floats relative to the water and descends relative to the air. A support portion 48 is provided on the lower side of the float 46 to prevent the float 46 from detaching below the communication tube 50 . Even when the float 46 is placed on the support portion 48 , a gap is ensured between the float 46 and the periphery of the support portion 48 . Therefore, the air in the pipe can be made to flow in both directions between the breather pipe 16 and the horizontal pipe 14, or the drainage can be made to flow from the breather pipe 16 to the horizontal pipe 14. On the other hand, a valve seat 54 is provided above the float 46 . When the float 46 comes into contact with the valve seat 54 due to the drainage flowing into the communication pipe 50 from the horizontal pipe 14, the space between the communication pipe 50 and the vent pipe 16 will be blocked, preventing the drainage from flowing from the horizontal pipe 14. Trachea 16 is open.

(effect) This embodiment is configured as described above, and its operation will be described below. In FIG. 1 , the drainage structure 10 has the upper portion 41A of the drainage trap 12 inserted into the through 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 drainage trap 12 while suppressing interference between the ventilation pipe 16 and the floor material 22 . In addition, this increases the vertical distance between the vent pipe 16 and the horizontal pipe 14 , thereby preventing the connection position between the drain trap 12 and the vent pipe 16 from being clogged by drain water that has passed through the water seal 34 . Therefore, the air on the downstream side of the water seal 34 in the drainage trap 12 can be caused to flow into the vent pipe 16, and the air can be suppressed from being retained in the drainage trap 12. In addition, by increasing the vertical distance between the vent pipe 16 and the horizontal pipe 14, the water head also becomes larger, so the drainage water that has passed through the water seal 34 can easily flow smoothly toward the horizontal pipe 14.

In addition, by making the lower end of the inner circumferential surface of the horizontal pipe 14 consistent with the height of the bottom of the outer basket 41, the height of the drainage trap 12 can be further reduced.

Furthermore, since the ventilation pipe 16 and the horizontal pipe 14 are connected through the communication pipe 50, even if the drainage flows into the ventilation pipe 16, the drainage will be discharged to the horizontal pipe 14 through the communication pipe 50. Therefore, water can be removed from the vent pipe 16 .

In addition, since the float valve 52 is provided inside the communication pipe 50, air can be discharged from the horizontal pipe 14 connected to the communication pipe 50 to the ventilation pipe 16, and drainage from the horizontal pipe 14 connected to the communication pipe 50 can be suppressed. Breathing tube 16 flows in.

Furthermore, since the communication pipe 50 is connected to the lower portion 16D of the ventilation pipe 16, even if the drainage flows into the ventilation pipe 16, the drainage will be easily discharged to the horizontal pipe 14 through the communication pipe 50. Specifically, the drainage flowing from the connection part 16A of the vent pipe 16 to the descending part 16B and the drainage flowing into the main pipe part 16C will be collected in the lower part 16D and discharged to the horizontal pipe 14 through the communication pipe 50 . Therefore, water removal from the breather pipe 16 can be performed efficiently.

In addition, since the drainage trap 12 is connected to the waterproof pan 26, when viewed from above, the lower portion 16D of the vent pipe 16 overlaps the through portion 32 of the floor material 22, so the communication pipe 50 is connected to the lower portion 16D. It will be located near the drainage trap 12. Therefore, the communication pipe 50 to which dirt is likely to adhere can be easily cleaned from the drain trap 12 side.

As described above, according to this embodiment, the height of the drainage trap 12 can be suppressed while the drainage that has passed through the water seal 34 of the drainage trap 12 can be smoothly flowed to the horizontal pipe 14 (siphon drainage pipe).

[Second Embodiment] In FIG. 3 , in the drainage structure 20 of this embodiment, the floor material 22 is provided with a notch 60 open in the through portion 32 within the installation range of the waterproof pan 26 . The vent pipe 16 is connected to a position including the upper part 41A of the drainage trap 12 through the notch 60 . Specifically, the connection portion 16A of the vent pipe 16 to the drainage trap 12 is connected to the outer basket 41 of the drainage trap 12 and is inserted into the upper portion 41A of the through-portion 32 of the floor material 22 . In addition, the connecting portion 16A of the vent pipe 16 may be 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 .

In FIG. 3 , the notch 60 has a shape in which a portion of the floor material 22 is removed from the lower surface side. Since the upper side of the floor material 22 also includes the notch 60 and is flat, it is suitable for supporting the waterproof pan 26 . In addition, the notch 60 has a flat part 60A and an inclined part 60C that make the floor material 22 thin. The inclined portion 60C is a portion that connects the flat portion 60A and the general portion 60B without the notch 60 . In the inclined portion 60C, the thickness of the floor material 22 changes. In addition, in the example shown in FIG. 3 , although the notch 60 does not penetrate the floor material 22 in the vertical direction, it may be configured to penetrate the floor material 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 . The vent pipe 16 is arranged horizontally from the connection part 16A to before the descending part 16B. In addition, a descending gradient may be added to this section toward the descending portion 16B side. In addition, the main tube portion 16C is arranged at a height close to the floor material 22 and is arranged horizontally so as to reach the rising portion 16E. In addition, a descending gradient may be added to this section toward the rising portion 16E side.

The lower portion 16D of the vent pipe 16 is provided in a portion without the notch 60 and is connected to the communication pipe 50 . In other words, the lower portion 16D of the vent pipe 16 is located at a position offset from the notch 60 , that is, away from the drainage trap 12 . In Figure 3, the lower portion 16D of the vent pipe 16 is located directly below the rising portion 16E. The communication pipe 50 is also provided directly below the rising part 16E. A float valve 52 similar to the first embodiment is provided inside the communication pipe 50 (see FIG. 2 ).

The other parts are the same as those in the first embodiment, so the same parts are given the same reference numerals in the drawings and descriptions thereof are omitted.

(effect) This embodiment is configured as described above, and its operation will be described below. In FIG. 3 , the drainage structure 20 has the ventilation pipe 16 connected to the drainage trap 12 through the notch 60 provided in the floor material 22 , and is inserted into the upper portion 41A of the through-portion 32 of the floor material 22 . Therefore, interference between the ventilation duct 16 and the floor material 22 can be suppressed.

In addition, the lower portion 16D of the vent pipe 16 is provided in a portion without the notch 60 and is connected to the communication pipe 50 . That is, compared with the case where the lower portion 16D of the vent pipe 16 overlaps the through portion 32 of the floor material 22, the distance from the drainage trap 12 to the communication pipe 50 is longer. Therefore, drainage water is allowed to flow into the vent pipe 16 to a certain extent.

[Reference example] In FIG. 4 , in the drainage structure 30 of the reference example, a ventilation channel 70 is formed inside the outer basket 41 of the drainage trap 12 and communicates with the ventilation pipe 16 and extends upward to the height of the floor material 22 . As an example, the air passage 70 is formed between the inner surface of the outer basket 41 and the first wall portion 71 separated from the inner surface. In addition, the air passage 70 extends upward from the inside of the connection position 41C of the air pipe 16 in the outer basket 41 . The ventilation channel 70 is connected to the inner portion 56 of the connecting position 41D of the horizontal pipe 14 in the outer basket 41 by a connecting channel 58 . The communication passage 58 is formed between the inner surface of the outer basket 41 and the second wall portion 72 separated from the inner surface.

In the radial direction of the outer basket 41, the width of the air passage 70 will be smaller than the width of the connecting passage 58. The first wall portion 71 and the second wall portion 72 are coupled and connected by an inclined wall portion 73 that is inclined in the up-down direction with respect to the outer basket 41 . The first wall portion 71, the inclined wall portion 73, and the second wall portion 72 are formed integrally as, for example, the wall forming member 74. This wall forming member 74 is removable from the outer basket 41 .

As shown in FIG. 8 , the inner surface of the outer basket 41 is provided with a guide rail 76 extending in the up and down direction, for example, having an L-shaped cross section. This guide rail 76 is provided with a pair. In addition, 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 is fitted into the guide rail 76 . By sliding the fitting portion 78 in the up-and-down direction along the guide rail 76, the wall forming member 74 can be attached and detached from the outer basket 41.

In addition, the installation direction of the wall forming member 74 with respect to the outer basket 41 is not limited to the up and down direction, and may also be in the radial direction. As an example, a hook portion (not shown) protruding radially inward may be provided on the inner surface of the outer basket 41 and the fitting portion 78 of the wall forming member 74 may be fitted into the hook portion. In this case, the wall forming member 74 can be attached and detached in the radial direction with respect to the outer basket 41 . In addition, the hook portion may be formed in a cross-sectional arrow shape or a single arrow shape. In addition, the wall forming member 74 may be made of an elastic material such as silicone rubber.

As shown in FIGS. 5 to 7 , a flange 64 is provided at the upper end of the air passage 70 to shield the air passage 70 from opening upward. As shown in FIGS. 8 and 9 , the flange 64 is integrally formed on the upper end of the first wall portion 71 through a plurality of support portions 67 , for example. Through the flange 64 , the air passage 70 opens radially inwardly of the outer basket 41 .

In FIGS. 4 and 5 , a float valve 62 is provided inside the connecting passage 58 . The float valve 62 is configured to allow the air in the tube to flow in both directions between the air passage 70 and the inner part 56, and to allow the drainage water to flow from the air passage 70 to the inner part 56 without allowing the drainage water to flow from the inner part 56 to the inner part 56. to the air passage 70. Specifically, a float 66 is provided inside the communication channel 58 . The density of the float 66 will be greater than the density of air and less than the density of water. Therefore, the float ball 66 floats relative to the drain water and descends relative to the air. A support portion 68 is provided on the lower side of the float 66 to prevent the float 66 from detaching below the connecting channel 58 . Even when the float 66 is placed on the support portion 68 , a gap is ensured between the float 66 and the periphery of the support portion 68 . Therefore, the air in the pipe can be circulated in both directions between the ventilation channel 70 and the inner part 56, or the drainage can be circulated from the ventilation channel 70 to the inner part 56. On the other hand, a valve seat 84 is provided above the float 66 . When the float 66 comes into contact with the valve seat 84 due to the drainage flowing into the communication channel 58 from the inner part 56, the connection channel 58 and the ventilation channel 70 are blocked, and the drainage does not flow from the inner part 56 to the ventilation channel. 70 in circulation.

In addition, although the inner portion 56 of the connecting position of the horizontal pipe 14 in the outer basket 41 and the ventilation channel 70 are connected through the communication channel 58, as shown in FIG. 11, the communication channel 58 can also be omitted and the ventilation channel can be used. 70The structure only opens upward but not downward. In addition, as shown in FIG. 11 , the flange 64 shown in FIG. 5 may be omitted. In this case, the upper end of the air passage 70 may also be located higher than the drainage window 42A of the inner basket 42 . The reason for this is that the drain water flowing out from the drain window 42A through the water seal 34 will not easily flow into the air passage 70 .

The other parts are the same as those in the first embodiment or the second embodiment, so the same parts are given the same reference numerals in the drawings and descriptions thereof are omitted.

(effect) This reference example is configured as described above, and its function will be described below. In FIGS. 4 and 5 , the drainage structure 30 is formed with a ventilation channel 70 connected to the ventilation pipe 16 and extending upward to the height of the floor material 22 inside the outer basket 41 of the drainage trap 12 . Therefore, even if the ventilation pipe 16 By arranging it at a position that does not interfere with the floor material 22, it is also possible to prevent drainage that has passed through the water seal 34 from clogging the vent pipe 16. Thereby, the air on the downstream side of the water seal 34 in the drainage trap 12 can be smoothly exchanged, and the air can be caused to flow toward the vent pipe 16 . Therefore, it is possible to suppress air from remaining downstream of the water seal 34 in the drainage trap 12 .

In addition, since the inner part 56 of the connecting position of the horizontal pipe 14 in the outer basket 41 and the ventilation channel 70 is connected through the communication channel 58, and a float valve 62 is provided inside the communication channel 58, the air can be passed from the communication channel 58 The inner portion 56 of the communication channel 58 is discharged to the air channel 70 , and drainage can be suppressed from flowing into the air channel 70 from the inner portion 56 of the communication channel 58 . Even if the drain water flows into the air passage 70 , the drain water will be discharged from the inner portion 56 to the horizontal pipe 14 through the communication passage 58 .

Furthermore, since the flange 64 is provided at the upper end of the air passage 70 to block the upward opening of the air passage 70, drainage that has passed through the water seal 34 can be suppressed from flowing into the air passage 70. This ensures the passage of air from the ventilation channel 70 to the ventilation pipe 16 , thereby suppressing air from remaining downstream of the water seal 34 in the drainage trap 12 .

In addition, in this drainage structure 30, the width of the ventilation channel 70 is smaller than the width of the connecting channel 58 in the radial direction of the outer basket 41. In addition, 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 that is inclined in the up-down direction with respect to the outer basket 41 . Therefore, in the drainage trap 12, by providing the inner basket 42 along the inclined wall portion 73 from the first wall portion 71, the capacity of the inner basket 42 can be ensured. Therefore, the height dimension of the drainage trap 12 can be reduced.

Furthermore, in this drainage structure, the first wall portion 71, the inclined wall portion 73, and the second wall portion 72 are integrally formed as, for example, the wall forming member 74 and are removable from the outer basket 41. Therefore, by removing the wall When the forming member 74 is removed from the outer basket 41, the drain trap 12 can be easily cleaned.

[Other embodiments] An example of the embodiment of the present disclosure has been described above. However, the embodiment of the present disclosure is not limited to the above description. In addition to the above description, it is of course possible to make various modifications and implement it within the scope that does not deviate from the gist of the present disclosure.

In addition, the above-mentioned embodiments and reference examples may be combined appropriately.

10: Drainage structure 12: Drainage trap 14: Horizontal tube 16: Snorkel 16A:Connection part 16B: Descending part 16C: Competent Department 16D: lower part 16E: Ascending part 17:Buildings 18:Floor 20: Drainage structure 22:Floor materials 24: Underfloor space 26:Waterproof tray 28:Hose 30: Drainage structure 32:Penetration Department 34:Water seal 36:Installation components 38:Padding 40:Connection Department 41: Outer basket 41A: Upper part 41B:Thread part 41C:Connection position 41D:Connection position 42:Inner basket 42A: Drainage window 43:Inner cylinder 44: Adjacent wall 46: Float 48:Support part 50:Connecting pipe 52: Float valve 54: Valve seat 56:Inner part 58:Connecting channel 60: Gap 60A: Flat part 60B:General Department 60C: Inclined part 62: Float valve 64:Flange 66: Float 67: Support part 68: Support part 70: Airway 71: 1st wall 72: 2nd wall 73: Inclined wall 74: Wall forming member 76: Guide rail 78: Chimeric part 84: Valve seat

FIG. 1 is a cross-sectional view showing the drainage structure according to the first embodiment. Figure 2 is a cross-sectional view showing the float valve inside the communication pipe. Fig. 3 is a cross-sectional view showing the drainage structure according to the second embodiment. Fig. 4 is a cross-sectional view showing the drainage structure related to the reference example. FIG. 5 is a cross-sectional view showing the internal structure of the drainage trap in the reference example. Figure 6 is a perspective cross-sectional view showing the internal structure of the outer basket. Figure 7 is a perspective cross-sectional view showing the internal structure of the outer basket. 8 is a perspective sectional view showing a state in which the wall forming member is removed from the outer basket. Figure 9 is a perspective view showing the wall forming member. Fig. 10 is a perspective view showing the wall-forming member viewed from another direction. FIG. 11 is a cross-sectional view showing an example in which the airway is not opened downward in the reference example.

10: Drainage structure

12: Drainage trap

14: Horizontal tube

16: Snorkel

16A:Connection part

16B: Descending part

16C: Competent Department

16D: lower part

16E: Ascending part

17:Buildings

18:Floor

22:Floor materials

24: Underfloor space

26:Waterproof tray

28:Hose

32:Penetration Department

34:Water seal

36:Installation components

38:Padding

40: Communications Department

41: Outer basket

41A: Upper part

42:Inner basket

42A: Drainage window

43:Inner cylinder

44: Adjacent wall

50:Connecting pipe

Claims (7)

A drainage structure having: a drainage trap configured to store water seals and installed with an upper part inserted into a through-portion provided in a plate-like member; and a siphon drainage pipe connected to the drainage trap. The water seal downstream side of the device; and the vent pipe is connected to a position on the water seal downstream side of the drainage trap that is above the siphon drainage pipe and includes the upper part of the drainage trap ; The drainage trap has an outer basket connected to the siphon drain pipe and the vent pipe, an inner basket arranged inside the outer basket and capable of storing the water seal, and an inner basket arranged inside the inner basket to form the water seal. The lower end of the inner circumferential surface of the siphon drainage pipe is located at the height of the bottom of the outer basket. For example, in the drainage structure of Item 1 of the patent application, the vent pipe and the siphon drainage pipe are connected through a connecting pipe. For example, in the drainage structure of Item 2 of the patent application, a float valve is provided inside the communication pipe, and being connected between the ventilation pipe and the siphon drainage pipe will cause the air in the pipe to flow in both directions, and will cause the drainage to flow from The vent pipe flows to the siphon drainage pipe without drain flowing from the siphon drain pipe to the vent pipe. For example, the drainage structure of claim 2, wherein the ventilation pipe system has a lower portion located at the boundary between the portion extending downward from the connection portion of the ventilation pipe and the drainage trap and the portion facing upward again; The communication pipe is connected to the lower part of the vent pipe. For example, the drainage structure of claim 3, wherein the ventilation pipe system has a lower portion located at the boundary between the portion extending downward from the connection portion of the ventilation pipe and the drainage trap and the portion facing upward again; The communication pipe is connected to the lower part of the vent pipe. For example, in the drainage structure of item 4 of the patent scope, the plate-like member is a floor material; a waterproof pan is provided on the floor material; the drainage trap is connected to the waterproof pan; when viewed from above, the ventilation pipe The lower portion overlaps the through portion. For example, in the drainage structure of item 5 of the patent application scope, the plate-like member is a floor material; a waterproof pan is provided on the floor material; the drainage trap is connected to the waterproof pan; when viewed from above, the ventilation pipe The lower portion overlaps the through portion.