JP7097253B2 - Water storage device and drainage system - Google Patents

Description

The present invention relates to a drainage system for draining sewage.

Conventionally, a sewage discharge system for discharging sewage from a drainage facility to a sewage main has been known. Drainage facilities include, for example, toilets, baths, kitchen sinks, and the like. This type of sewage discharge system is equipped with a pipeline connecting the drainage system and the sewage main. The sewage flowing out of the drainage facility is discharged to the sewage main through the pipeline.

By the way, when a disaster such as a large-scale earthquake or tsunami occurs, water supply to the drainage facility becomes impossible and there is a possibility that water outage may occur. In addition to existing toilets, temporary drainage facilities such as simple toilets may be installed in order to solve the shortage of drainage facilities such as toilets in the event of a disaster.

Such a temporary drainage facility can be provided by using a standing pipe provided in an existing pipeline. The sewage discharged from the temporary drainage facility can be stored in the pipeline up to a predetermined amount, and after reaching the predetermined amount, the valve on the downstream side can be opened to discharge the sewage.

Here, when the valve is opened to discharge sewage, it is assumed that a person other than a person having specialized knowledge is forced to perform the work. Therefore, it is desirable that the operation of opening the valve can be easily performed by a person who does not have specialized knowledge. As a technique for opening a valve in such an emergency, the following Patent Document 1 discloses a drainage facility for a temporary toilet. In the drainage facility of Patent Document 1, it is said that the opening operation of the water storage gate provided in the manhole can be performed without removing the manhole cover material.

JP-A-2017-127645

However, the drainage facility of Patent Document 1 can only open the valve arranged on the downstream side of the temporary toilet after the sewage is stored until it reaches a predetermined amount. In other words, the drainage facility of Patent Document 1 merely allows sewage to flow toward the sewage main, regardless of whether or not the sewer can be supplied or drained.

Further, it is conceivable to provide an electric switch for the purpose of easily opening and closing the outlet by a person who does not have specialized knowledge in the event of a disaster. However, in the event of a disaster, it is expected that all lifelines will be shut down, such as the supply of electricity will be cut off in addition to water supply. Therefore, it is desirable that equipment that is expected to be used in the event of a disaster can be operated manually without the need for a power source.

Therefore, an object of the present invention is to provide a water storage device and a drainage system capable of easily opening and closing a water outlet for draining sewage.

The water storage device of the present invention provided to solve the above-mentioned problems is arranged on a pipeline forming a drainage channel for draining sewage, and is formed in a tubular shape and introduced into the water. Closes the main body of the water storage device provided with an outlet for allowing the water to flow out, the closing portion that can close the outlet, and the opening formed so as to communicate with the inside at one end side in the axial direction of the main body of the water storage device. The water can be stored inside the water storage device main body by having a lid and closing the outlet by the closing portion, and by moving the closing portion to a position away from the outlet, the flow can be stored. The outlet can be opened to allow the water stored in the water storage device main body to flow out, and the tubular body has an operation portion connected to the closed portion and is provided in the lid. By inserting the operation unit into the unit, the operation unit is held so that it can be slid in the axial direction of the water storage device main body, and the water supply port is closed by the closed portion. It is characterized in that the end portion on the side protrudes to the outside of the main body of the water storage device, and the end portion on the discharge port side is held so as to open inside the main body of the water storage device.

According to the water storage device of the present invention, the outlet can be opened and closed while the water storage device is closed by the lid. Therefore, in the water storage device of the present invention, it is not necessary to remove the lid to open / close the outlet, and even a person who does not have specialized knowledge can easily open / close the outlet. Further, since the operation unit of the water storage device of the present invention is a tubular member, water can be supplied from the outside to the inside of the water storage device through the operation unit while the water storage device is closed by the lid. .. Therefore, the water storage device of the present invention can easily perform the opening / closing operation of the outlet and the water supply operation with the lid closed. Further, the water storage device of the present invention can manually open and close the outlet. Therefore, the water storage device of the present invention can open and close the outlet even when the supply of electricity is stopped. In the present invention, the opening formed so as to communicate with the inside at one end side in the axial direction of the water storage device main body is connected to the water storage device main body even if it is an opening provided in the water storage device main body itself. It may be an opening formed in another cylinder (for example, the inspection cylinder 30 described later).

In the water storage device of the present invention, the operating portion includes a first tubular body attached to the closed portion and a second tubular body connected to the first tubular body, and the first tubular body and the second tubular body. It has a length from the outlet to the outside of the water storage device when the pipes are connected, and when the second pipe is removed from the first pipe, the first pipe is used. Is desirable to fit inside the water storage device.

According to the above configuration, normally, the second pipe body of the operation unit is removed from the first pipe body, and the operation unit is housed inside the water storage device so as not to protrude to the outside of the water storage device. When an opening / closing operation is required, the first pipe material and the second pipe material can be connected and used. As a result, the water storage device of the present invention can make the operation unit function in the event of a disaster or the like, and can prevent the operation unit from protruding from the water storage device and obstructing the traffic of people during normal times.

Further, it is desirable that the water storage device of the present invention has a stopper portion that regulates the displacement range of the operation portion.

According to the above configuration, the operation portion can be operated within an appropriate range to regulate the displacement range of the closed portion. That is, according to the water storage device of the present invention, it is possible to suppress problems such as the operation unit being excessively displaced and the operation unit being displaced to the outside of the water storage device, or the closed portion being dropped from the outlet.

Further, in the water storage device of the present invention, the operation unit has a first pipe body attached to the closed portion, a second pipe body connected to the first pipe body, the first pipe body and the second pipe body. It is provided with a pipe joint for connecting the pipe bodies, and the stopper portion may be formed in the pipe joint.

According to the above configuration, the pipe joint can function as a stopper portion. As a result, the water storage device of the present invention does not need to additionally provide parts for functioning as a stopper portion, and can suppress an increase in the number of parts.

In the water storage device of the present invention, the stopper portion is formed so as to project in the radial direction of the operation portion, and the operation portion is at a position where the stopper portion and the lid body are in contact with each other. Axial movement can be restricted.

According to the above-mentioned configuration, it can be utilized as a configuration for bringing the lid body into contact with the stopper portion. As a result, the water storage device of the present invention does not need to additionally provide parts for abutting the stopper portion, and can suppress an increase in the number of parts.

In the water storage device of the present invention, the operation unit may include a pipe joint connecting the first pipe body and the second pipe body.

According to the above configuration, the first pipe body and the second pipe body can be separated and connected, and the first pipe body and the second pipe body can be connected without interrupting the flow path penetrating the entire operation unit. Can be done.

Further, in the water storage device of the present invention, the operation unit has a first pipe body attached to the closed portion, a second pipe body connected to the first pipe body, the first pipe body and the second pipe body. The first pipe body is provided with a pipe joint for connecting the pipe bodies, and the first pipe body is screwed and connected to the pipe joint by rotating relative to the front pipe joint in the circumferential direction. You may.

According to the above configuration, the operation disassembled by the operation of inserting the first tube body from the insertion portion of the lid body and then rotating the first tube body while allowing the first tube body and the second tube body to be separated and connected. The parts can be connected. As a result, the water storage device of the present invention can easily connect the operation unit.

The drainage system of the present invention has the above-mentioned water storage device, a pipeline forming a drainage channel for draining sewage, and a water supply source, and the water storage device is on the pipeline and is more than the water supply source. It is characterized by being provided on the downstream side.

According to the drainage system of the present invention, water can be supplied from a water supply source to flush out sewage in a pipeline and drain it. Further, according to the drainage system of the present invention, the outlet of the water storage device can be opened and closed while the water storage device is closed by the lid. Therefore, in the drainage system of the present invention, it is not necessary to remove the lid to open / close the outlet of the water storage device, and even a person without specialized knowledge can easily open / close the outlet. can. Further, in the drainage system of the present invention, since the operation part of the water storage device is a tubular member, water is supplied from the outside to the inside of the water storage device through the operation part while the water storage device is closed by the lid. can do. Therefore, the drainage system of the present invention can easily perform the opening / closing operation of the outlet and the water supply operation with the lid closed. Further, the water storage device of the drainage system of the present invention can manually open and close the outlet. Therefore, the drainage system of the present invention can open and close the outlet of the water storage device even when the supply of electricity is stopped.

Further, the drainage system of the present invention has one or a plurality of standing pipes provided on the pipeline and a temporary drainage facility temporarily attached to at least one of the standing pipes, and the temporary drainage facility is provided. It is possible that the pipe is provided on the pipeline and on the downstream side of the water storage device.

According to the above configuration, in the event of a disaster or the like, a temporary drainage facility such as a temporary toilet can be installed by utilizing the existing standing pipe. Further, according to the above configuration, the sewage discharged from the temporary drainage facility can be washed away by the water supplied from the water supply source and drained.

The drainage system of the present invention has a sewage storage tank capable of storing sewage and a switchable drainage mass capable of switching the drainage flow path, and an operation is performed on the switchable drainage mass. The drainage flow path may be switched so that the sewage is discharged toward the sewage storage tank.

According to the above configuration, when the sewage main or the pipeline on the downstream side of the switching mass is damaged, the sewage discharge destination can be switched to the sewage storage tank to drain the sewage. That is, according to the drainage system of the present invention, when the water supply to the sewerage system is stopped and the water supply cannot be supplied, and the drainage to the sewerage main does not function (when the water supply / drainage is not possible), the function of the water supply / drainage is replaced with sewage. Can be drained.

In the drainage system of the present invention, the water supply source is a water storage tank capable of storing water, the water storage tank has a pump for pumping water from the water storage tank, and the stored water supplied via the pump is the water supply. It can be supplied from the mouth to the inside of the water storage device.

According to the above configuration, the stored water stored in the water tank can be utilized to efficiently drain the sewage.

According to the present invention, it is possible to provide a water storage device and a drainage system capable of easily opening and closing a water outlet for draining sewage.

It is a schematic diagram which shows the drainage system of this invention. It is sectional drawing which shows the water storage device of this invention. The mass main body, the closed part, and the operation part of the water storage device of FIG. 2 are shown. (A) is a plan view, (b) is a left side view, (c) is a sectional view taken along the line AA'of FIG. 3 (b), and (d) is a right side view. It is an exploded perspective view of the water storage device of FIG. 2 is a state of an operation unit of the water storage device of FIG. 2 and a cross-sectional view when the operation unit is operated. (A) shows a separated state, (b) shows a connected state, and (c) shows a state in which the operating portion is pulled upward. It is sectional drawing which shows the switchable drainage mass of the drainage system of FIG. It is a perspective view which shows the mass main body and the switching member of the switchable drainage mass of FIG. It is a cross-sectional view taken along the line BB'of FIG. 7 which shows the mass main body and the switching member of the switchable drainage mass of FIG. (A) is a state in which the first flow path is formed, and (b) is a state in which the second flow path is formed. It is a schematic diagram which shows the normal time of the drainage system of FIG. It is a schematic diagram which shows the operation time of the drainage system of FIG. It is sectional drawing which shows the operation of the water storage device of the drainage system of FIG. (A) shows a state in which the outlet is closed to supply stored water, and (b) shows a state in which the outlet is opened.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

FIG. 2 is a cross-sectional view showing a water storage device 10 according to an embodiment of the present invention. FIG. 1 is a schematic diagram showing a drainage system S of the present invention. As shown in FIG. 1, the drainage system S includes a water storage device 10.

<About the drainage system>
The drainage system S discharges the sewage discharged from the drainage facility 3 toward the downstream side of the sewage main 4, etc.

More specifically, in the drainage system S, when the water supply to the drainage facility 3 is functioning (during the water supply function) and the drainage to the sewage main 4 is functioning (drainage). During functioning), the sewage discharged from the drainage facility 3 is discharged toward the downstream side of the sewage main 4, etc.

In addition, the drainage system S is a temporary toilet in a place such as when the water supply is stopped due to a disaster such as an earthquake (water supply is cut off) and the water supply to the drainage facility 3 is not functioning, or when the water supply facility is not sufficient. When the water supply function is insufficient (when water supply is not possible), the stored water is supplied to the pipeline 40, which will be described later, and the sewage is discharged to the downstream side.

Further, in the drainage system S, when the sewage main 4 or a part of the pipeline 40 is damaged and it is difficult to drain the sewage to the sewage main 4 (when drainage is not possible), the sewage is stored in the sewage storage tank. It can be discharged to 84.

That is, when the drainage system S cannot supply water and cannot drain water (when water supply / drainage is not possible), the drainage system S supplies stored water to discharge the sewage to the pipeline 40 and sewage the sewage discharged from the drainage facility 3. It is discharged toward the storage tank 84.

In the following description, the case where the water supply to the drainage facility 3 is functioning and the drainage to the sewage main 4 is functioning is referred to as "during the water supply / drainage function" or "normal time". It may be described and explained. Further, a case where water needs to be supplied from a water supply source such as a water storage tank 80 even when water supply is not possible may be described as "during operation".

The sewage main 4 is a pipe that guides sewage to a sewage treatment plant (not shown). The sewage flowing out from the drainage facility 3 of the building 1 is normally discharged to the sewage main 4.

In addition, in FIG. 1, the configuration of the drainage system S provided at the time of operation, such as the temporary drainage facility 3b and the water supply pump 82 described later, is shown by a virtual line.

"Drainage equipment" is equipment that discharges sewage. The "drainage facility" may be, for example, a toilet, a bath or a kitchen sink. Further, among the "drainage facilities", the drainage facilities such as toilets and baths already installed in the building 1 may be described as "existing drainage facilities 3a". Further, among the "drainage facilities", the drainage facilities such as temporary toilets provided on the outside of the building 1 may be described as "temporary drainage facilities 3b".

"Building" refers to a building that has at least walls and includes houses, commercial facilities, factories, school buildings and warehouses. In addition, "indoor" includes not only the space above the floor surrounded by the roof and walls, but also the space under the floor. In a plan view, the part surrounded by the wall is "inside the building".

"Sewage" is water discharged from, for example, a toilet, a bath, a sink in a kitchen, or the like, and cannot be discharged into a river as it is.

FIG. 1 illustrates one existing drainage facility 3a provided in one building 1, but the number of the building 1 and the existing drainage facility 3a is not particularly limited. The number of buildings 1 may be one or a plurality. Further, the indoor 2 may be provided with only one existing drainage facility 3a, or may be provided with a plurality of existing drainage facilities 3a.

Further, in FIG. 1, two temporary drainage facilities 3b are shown by virtual lines, but the number of temporary drainage facilities 3b provided in the drainage system S is not particularly limited. Further, the drainage system S of the present invention may be used not only when the temporary drainage facility 3b is provided, but also for draining sewage from the existing drainage facility 3a when the water supply is stopped. In such a case, the temporary drainage facility 3b may not be provided.

In the sewage flow path in the following description, the sewage main 4 or the sewage storage tank 84 side is simply described as the "downstream side", and the side opposite to the downstream side where the water storage tank 80 described later is provided. May be described simply as "upstream side".

Further, the “drainage mass” in the present specification includes various drainage masses such as sewage mass, rainwater mass, and public mass. The term "drainage mass" in the present specification will be described as including the mass body, an inspection tube, a standing pipe, and a lid.

As shown in FIG. 1, the drainage system S includes a water storage device 10, a pipeline 40, a water storage tank 80 (water supply source, a water storage tank), a switchable drainage mass 50, a backflow suppression mass 70, and a sewage storage tank 84. .. Further, in the drainage system S, in addition to these configurations, a water supply pump 82 (pump) and a temporary drainage facility 3b are provided at the time of operation. Hereinafter, each configuration will be described with reference to the drawings.

In the pipeline 40, a plurality of pipe materials, joints, and the like are connected to form a drainage flow path C that serves as a flow path for sewage. The "pipeline" means a passage through which water is circulated. The "pipeline" may be composed of a single pipe, or may be composed of a plurality of pipes and a joint connecting them as in the present embodiment. Further, the “drainage channel” means a route to be followed when water (sewage, etc.) is discharged.

As shown in FIG. 1, the pipeline 40 includes a first pipeline 42 and a second pipeline 44. Further, the pipeline 40 is provided with a plurality of vertical pipes 48. A water storage device 10, a switchable drainage mass 50, and a backflow suppression mass 70 are arranged in the pipeline 40.

The first pipeline 42 is provided so as to reach the sewage main 4 from the water storage device 10. Further, the second pipeline 44 is provided so as to reach from the switchable drainage mass 50 to the sewage storage tank 84. The pipeline 40 can form two systems as a drainage channel C for sewage by the first pipeline 42 and the second pipeline 44. Specifically, the pipeline 40 discharges sewage to the sewage storage tank 84 via the first flow path c1 for draining sewage to the sewage main 4 via the first pipeline 42 and the sewage storage tank 84 via the second pipeline 44. It is possible to form the second flow path c2.

In other words, the pipeline 40 forms the first flow path c1 as a drainage flow path C for normal times in which sewage is discharged to the sewage main 4 by the first flow path c1. Further, when the pipeline 40 cannot be discharged, there is a possibility that sewage may flow back to the upstream side due to damage to the sewage main 4 or the first pipeline 42 on the downstream side of the branch portion with the second pipeline 44. As the drainage flow path C for use, a second flow path c2 for discharging sewage to the sewage storage tank 84 is formed.

The vertical pipe 48 is provided on the pipe line 40. More specifically, the vertical pipe 48 is provided in the drainage mass 47 provided in the pipe line 40. In addition to being provided in the drainage mass, the standing pipe 48 may be connected to the pipeline 40 via a joint. Further, the drainage mass provided with the standing pipe 48 can be variously selected such as a sewage mass and a rainwater mass.

The standing pipe 48 is a pipe extending downward from the ground. The upper end of the standing pipe 48 is open toward the ground. As shown in FIG. 1, a temporary drainage facility 3b can be attached to the upper end of the standing pipe 48. In a state where the temporary drainage facility 3b is not provided, such as during a normal time other than a disaster, the opening at the upper end of the standing pipe 48 is covered with a lid 49 and closed. Further, in a situation where the temporary drainage facility 3b is installed such as in the event of a disaster, the lid 49 is removed from the opening of the standing pipe 48, and the temporary drainage facility 3b is attached. The lower end of the standing pipe 48 is connected to the first pipe line 42.

Note that FIG. 1 shows an example in which the temporary drainage facility 3b is provided on the vertical pipe 48 provided on the downstream side of the existing drainage facility 3a, but the temporary drainage facility 3b is on the upstream side of the existing drainage facility 3a. It may be provided in the standing pipe 48. For example, when the standing pipe 48 is provided on the upstream side of the existing drainage facility 3a and on the downstream side of the water storage device 10, the temporary drainage facility 3b may be provided in the standing pipe 48.

The water storage device 10 is provided as a water gate for supplying the stored water supplied from the water storage tank 80 to the pipeline 40. The water storage device 10 of the present embodiment is made by processing and molding a resin material such as vinyl chloride (vinyl chloride) or fiber reinforced plastic.

As shown in FIGS. 2 and 4, the water storage device 10 has a mass main body 12, a closing portion 18, an operating portion 20, an inspection cylinder 30, and a lid 32.

The water storage device 10 is a substantially cylinder in which an inspection cylinder 30 as a tubular member is attached to a mass body 12, one end of which is closed in the longitudinal direction, and an opening 31 is formed at the other end. It has a hollow shape. Further, the lid 32 is detachably fitted in the opening 31.

The water storage device 10 is buried in the ground so that the opening 31 faces upward and the end opposite to the opening 31 faces downward so that the longitudinal direction is vertically aligned. In the following description, the longitudinal direction of the water storage device 10 may be simply referred to as "axial direction X". Further, of both sides of the water storage device 10 in the axial direction X, the opening 31 side may be described simply as "upper side" and the other side may be described simply as "lower side".

As shown in FIGS. 3 and 4, the mass body 12 is a substantially cylindrical member having an opening formed at the upper side and closed at the lower side. As shown in FIG. 4, an outlet 14 is provided on the side of the mass body 12. The first pipeline 42 is connected to the outflow port 14. The water storage device 10 can allow the water supplied to the inside to flow out from the outlet 14 toward the first pipe line 42. In the present embodiment, the outlet 14 is a receiving port, but the outlet 14 may be an outlet. Further, the first pipeline 42 may be directly connected to the outlet 14, or may be indirectly connected to the outlet 14 via another member.

As shown in FIG. 3A, the mass body 12 is provided with a guide portion 16a. The guide portion 16a is provided to guide the displacement of the closing portion 18 along the axial direction X. As shown in FIG. 4, the guide portion 16a has a groove-like unevenness extending in the axial direction X. In the present embodiment, the guide portion 16a is formed on the guide portion forming body 16 which is separate from the mass main body 12. In the present embodiment, the guide portion 16a is formed on the mass main body 12 by attaching the guide portion forming body 16 to the mass main body 12. The guide portion 16a may be formed directly on the mass body 12.

As shown in FIG. 4, the guide portion forming body 16 includes a mounting portion 16b and an fitting portion 16c. The mounting portion 16b has a curved shape along the inner wall surface of the mass body 12, and a hole portion 16d is formed substantially in the center. Further, the fitting portion 16c is formed so as to surround the hole portion 16d formed in the mounting portion 16b. The guide portion forming body 16 is attached to the mass main body 12 in a state where the mounting portion 16b is attached to the inner wall surface of the mass main body 12 and the fitting portion 16c is fitted inside the outlet 14.

The lid 32 is a lid member attached to the opening 31 to close the opening 31. The lid 32 can be removed and attached from the ground. As shown in FIG. 4, the lid 32 is provided with an insertion portion 34. The insertion portion 34 is provided to allow the operation portion 20 to be inserted from the inside to the outside of the water storage device 10. In the present embodiment, the insertion portion 34 is a through hole that penetrates substantially the center of the lid 32. As shown in FIG. 4, the insertion portion 34 has a substantially circular shape having the size of the diameter D1. The insertion portion 34 may have any shape as long as the operation portion 20 can be taken out. For example, the insertion portion 34 may have a through hole formed in the lid 32 as in the present embodiment, or may have a shape such that a part of the lid 32 is cut out.

The closing portion 18 is provided to close the outlet 14. As shown in FIG. 4, the closed portion 18 has a sliding portion 18a and a connecting portion 18b. The sliding portion 18a is slidable with respect to the mounting portion 16b of the guide portion forming body 16. The connecting portion 18b has a shape that protrudes inward in the radial direction of the water storage device 10 from the sliding portion 18a. The connection portion 18b is provided with a mounting hole 18d. A protruding portion 22a provided in the first pipe body 22 of the operation unit 20, which will be described later, is fitted into the mounting hole 18d of the connection portion 18b, and the first pipe body 22 is mounted.

The sliding portion 18a is provided with a protrusion-shaped convex portion 18c extending linearly along the axial direction X. The closed portion 18 is attached to the guide portion forming body 16 so that the convex portion 18c and the guide portion 16a mesh with each other. Further, the closed portion 18 can be displaced by sliding with respect to the mass main body 12 while being guided in the axial direction X by the fitting structure of the convex portion 18c and the guide portion 16a.

The operation unit 20 is provided for performing an operation of displacing the closing unit 18 in the axial direction X. As shown in FIG. 4, the operation unit 20 includes a first pipe body 22, a second pipe body 24, and a pipe joint 26.

The first tube body 22 and the second tube body 24 are tubular members. The first tubular body 22 is provided with a protruding portion 22a so as to project outward in the radial direction. The first tubular body 22 is attached to the closed portion 18 by fitting the protruding portion 22a into the mounting hole 18d of the closed portion 18.

As shown in FIG. 4, the second pipe body 24 has an outer diameter of diameter D2. The size of the diameter D2 of the second tube body 24 is smaller than the diameter D1 of the insertion portion 34 of the lid body 32 (D2 <D1).

The pipe joint 26 is provided to connect the first pipe body 22 and the second pipe body 24 in a separable manner. The pipe joint 26 of the present embodiment is a so-called conversion joint capable of connecting two pipe bodies having different radial sizes. As shown in FIG. 4, the pipe joint 26 has a diameter-expanded portion 28 having an outer diameter D3 larger than the outer diameter D2 of the second pipe body 24. The outer diameter D3 of the enlarged diameter portion 28 is larger than the diameter D1 of the insertion portion 34 formed in the lid 32 (D3> D1). Therefore, in a state where the first pipe body 22 and the second pipe body 24 are connected by the pipe joint 26 (connected state), when the operation unit 20 is pulled upward along the axial direction X, the operation unit 20 is expanded in diameter. The upward movement is restricted at the position where the 28 and the lid 32 come into contact with each other. In this way, the diameter-expanded portion 28 functions as a stopper portion 29 that regulates the displacement range of the operating portion 20 in the axial direction X.

As shown in FIG. 2, the operation unit 20 has a tubular shape in which the first pipe body 22 and the second pipe body 24 are connected by a pipe joint 26 and are inserted from one end to the other end as a whole. In other words, the operation unit 20 uses the end on the side taken out of the water storage device 10 as the water supply port 36 and the end on the side arranged inside the water storage device 10 as the discharge port 38 as a water supply pipe. Function. As a result, the operation unit 20 can take in the stored water from the water supply port 36, discharge it from the discharge port 38, and supply it to the inside of the water storage device 10. Further, the water supply port 36 of the operation unit 20 functions as an outlet or a receiving port for connecting the water supply pump 82.

As shown in FIG. 5A, in the state where the second pipe body 24 is removed from the first pipe body 22 (separated state), the first pipe body 22 connected to the pipe joint 26 and the closing portion 18 is It is arranged below the opening 31. In other words, in the separated state, the operation unit 20 is in a state of being accommodated inside the water storage device 10. Further, the second pipe body 24 removed from the first pipe body 22 can be housed inside, for example, the water storage device 10 (see the virtual line in FIG. 5A). Therefore, the water storage device 10 can be configured so that the operation unit 20 can be accommodated inside the water storage device 10 in a normal time when it is not necessary to operate the operation unit 20, and the operation unit 20 can be used when a person comes and goes. You can avoid getting in the way.

As shown in FIG. 5B, in the state where the second pipe body 24 is attached to the first pipe body 22 (connected state), the upper end of both ends of the operation unit 20 is the insertion portion of the lid body 32. It is taken out to the outside of the water storage device 10 via 34. Further, in this state, the closing portion 18 is arranged at a position where the outlet 14 is closed when the operation of pulling up the operating portion 20 is not performed. Further, as described above, the operation unit 20 is a tube body that is inserted in the axial direction X. Therefore, the operation unit 20 can take in water by using the upper end as the water supply port 36 and the lower end as the discharge port 38 to take in the water inside the water storage device 10. In other words, the water storage device 10 does not need to remove the lid 32 when supplying water.

As shown in FIG. 5C, when the operation unit 20 in the connected state is pulled upward, the closed portion 18 connected to the first pipe body 22 is pulled upward, and the closed portion 18 flows. Displace the outlet 14 to a position where it is not blocked. As a result, the outlet 14 is opened and the water supplied to the inside of the water storage device 10 flows out from the outlet 14 to the first pipeline 42.

Further, when the closing portion 18 is displaced upward in conjunction with the operation of pulling up the operating portion 20, the closing portion 18 is displaced while being guided in the axial direction X by the guide portion 16a. Further, when the operation unit 20 is pulled upward, the operation unit 20 is restricted from moving upward at the position where the enlarged diameter portion 28 (stopper portion 29) comes into contact with the lid body 32. Therefore, it is possible to prevent the convex portion 18c (see FIG. 4) of the closed portion 18 from falling off from the guide portion 16a (see FIG. 4).

As shown in FIG. 5C, the operation unit 20 can be displaced by a distance L1. In the present embodiment, the distance L1 at which the operation unit 20 is displaceable and the radial size D4 of the outlet 14 substantially coincide with each other. The displaceable distance L1 of the operating portion 20 can be appropriately adjusted by an engaging structure between the closing portion 18 and the mass main body 12 (for example, an engaging structure between the convex portion 18c and the guide portion 16a).

In this way, the water storage device 10 can open the outflow port 14 blocked by the closing section 18 by operating the operating section 20. As a result, the water storage device 10 can flow out or shut off the water supplied from the water storage tank 80.

The switchable drainage mass 50 is provided so that the drainage flow path C can be switched between the first flow path c1 and the second flow path c2. The switchable drainage mass 50 is buried in the ground outside the building 1.

As shown in FIG. 6, the switchable drainage mass 50 has a mass body 52, a switching member 60, an inspection cylinder 58, and a lid 59. The switchable drainage mass 50 causes the drainage flow path C to move from the first flow path c1 to the second flow path c2 or from the second flow path c2 to the first flow due to the displacement of the relative position of the switching member 60 with respect to the mass body 52. It is possible to switch to the road c1.

The switchable drainage mass 50 of the present embodiment is made by processing and molding a resin material such as vinyl chloride and reinforced fiber plastic. The switchable drainage mass 50 may be formed by forming the mass body 52 and the inspection cylinder 58 from a material such as concrete.

As shown in FIGS. 6 and 7, the mass body 52 is a member in which openings are formed in the upper part and the lower part, and a plurality of substantially cylindrical portions are integrally formed. Further, two openings are formed on the side portion of the mass body 52. Further, as shown in FIG. 7, a step portion 57 is formed inside the mass body 52.

The opening formed in the upper part of the mass body 52 is an inspection port 53. Further, of the two openings formed on the side of the mass body 52, one is an inflow port 54 for inflowing sewage, and the other is a first outflow port 55 for outflowing sewage. Further, the opening formed in the lower part of the mass body 52 is a second outlet 56 for draining sewage. That is, the mass main body 52 is provided with one inlet 54 and two outlets, a first outlet 55 and a second outlet 56.

As shown in FIG. 6, the inspection port 53 opens toward the ground. An inspection cylinder 58 is connected to the inspection port 53. The upper end of the inspection cylinder 58 is arranged so as to be substantially the same height as the ground. The operator can inspect the inside of the mass body 52 for damage or clogging from the ground through the inspection cylinder 58. A lid 59 is arranged at the upper end of the inspection cylinder 58. The lid 59 can be removed from the ground. The inspection cylinder 58 is closed by the lid 59. The lid 59 can prevent the malodor generated from the sewage in the switchable drainage mass 50 from leaking to the outside through the inspection port 53.

The inflow port 54 is a portion where the sewage flowing out from the drainage facility 3 flows in. Further, the first outlet 55 is a portion where the sewage flowing into the mass main body 52 flows out. The first outlet 55 is a side portion of the mass body 52 and is provided at a position facing the inlet 54.

The second outlet 56 is a portion where the sewage flowing into the mass main body 52 flows out, similarly to the first outlet 55. The second outlet 56 is provided at the lower part of the mass main body 52 and opens downward. The second outlet 56 is arranged between the inlet 54 and the first outlet 55. As shown in FIG. 1, in the drainage system S, the sewage storage tank 84 is arranged below the switchable drainage mass 50, and the second outlet 56 is connected to the sewage storage tank 84 via the second pipeline 44. It is connected. The second outlet 56 may be directly connected to the sewage storage tank 84 without using a pipe or the like.

The switching member 60 is a member for switching the drainage flow path C of sewage to the first flow path c1 and the second flow path c2. Specifically, the switching member 60 drains the sewage flowing out from the drainage facility 3 to the sewage main 4 by the first flow path c1 or drains the sewage to the sewage storage tank 84 by the second flow path c2. It is provided for switching the drainage flow path C.

The switching member 60 is housed inside the mass body 52. Further, the switching member 60 is detachable from the second outlet forming portion 52a formed below the mass main body 52. When the switching member 60 is fitted into the second outlet forming portion 52a, the second outlet 56 is closed. When the switching member 60 is removed from the second outlet forming portion 52a, the second outlet 56 is opened.

As shown in FIG. 7, the switching member 60 includes a main body portion 62, a handle 63, a fitting portion 64, and an overflow suppression plate 65.

As shown in FIG. 7, the main body portion 62 is formed in a substantially U shape in a cross-sectional view. Crossguards 62b are formed on both sides of the main body 62 so as to project radially outward. Further, the main body portion 62 is provided with a bottom surface 62a forming a flow path connecting the inflow port 54 to the first outflow port 55.

As shown in FIG. 7, the handle 63 extends from the cross-shaped portion 62b on one end side to the cross-shaped portion 62b on the other end side, and is provided so as to cross the main body portion 62. The fitting portion 64 is provided below the main body portion 62. The fitting portion 64 is a substantially cylindrical portion that can be fitted to the second outlet 56 in order to close the second outlet 56. In the present embodiment, a rubber sealing member 64a is provided on the outer peripheral portion of the fitting portion 64. The seal member 64a provides a seal between the second outlet 56 and the fitting portion 64 of the switching member 60. The overflow suppression plate 65 is provided to prevent sewage from overflowing to the first outlet 55 side when the second flow path c2 is formed.

In the switchable drainage mass 50, when the fitting portion 64 of the switching member 60 is fitted in the second outlet forming portion 52a, the second outlet 56 is closed and the sewage flowing in from the inflow port 54 is first flowed. Let it flow out from the exit 55. Specifically, as shown in FIG. 8A, when the first flow path c1 is formed so that the inflow port 54 and the first outflow port 55 communicate with each other, the switching member 60 has a crossguard portion 62b as a mass body. The posture is maintained so as to be supported by the stepped portion 57 (not shown in FIG. 8) of the 52. As a result, the switching member 60 is arranged so as to connect the bottom surface 62a with the inflow port 54 and the first outflow port 55, and forms a substantially U-shaped drainage channel in a cross-sectional view.

The switchable drainage mass 50 displaces the position of the switching member 60 with respect to the mass body 52 from the state where the fitting portion 64 of the switching member 60 is fitted in the second outlet 56, so that the sewage discharge port is first flowed. It is possible to switch from the outlet 55 to the second outlet 56.

Specifically, from the state shown in FIG. 8A, when the handle 63 of the switching member 60 is gripped and lifted upward and the switching member 60 is displaced so as to rotate about 90 degrees in the circumferential direction, the switching member is formed. Reference numeral 60 is a state in which the main body portion 62 is supported above the stepped portion 57 (not shown in FIG. 8) of the mass main body 52 (see FIG. 8 (b)). As shown in FIG. 8B, when the main body portion 62 is supported by the stepped portion 57 of the mass main body 52, the bottom surface 62a is displaced upward and the closed second outlet 56 is opened.

When the second outlet 56 is open, the sewage that has flowed into the mass body 52 from the inlet 54 falls toward the second outlet 56 before reaching the first outlet 55, and the second outlet 56 is opened. Outflow from 56. As a result, the switchable drainage mass 50 can be switched from a state in which sewage is discharged from the first outlet 55 to a state in which sewage is discharged from the second outlet 56. Further, in the switchable drainage mass 50, the operation is opposite to that described above, that is, the fitting portion 64 is fitted into the second outlet forming portion 52a from the state where the fitting portion 64 is removed from the second outlet forming portion 52a. It is possible to switch from a state in which sewage is discharged from the second outlet 56 to a state in which sewage is discharged from the first outlet 55.

The backflow suppression mass 70 is a drainage mass provided on the downstream side of the drainage flow path C with respect to the switchable drainage mass 50. The backflow suppression mass 70 may be any kind of drainage mass such as a sewage mass or a rainwater mass as long as it is a drainage mass provided on the downstream side of the switchable drainage mass 50. Further, the backflow suppression mass 70 of the present embodiment is made by processing and molding a resin material such as vinyl chloride or reinforced fiber plastic. The backflow suppression mass 70 may be formed by forming the mass body or the inspection cylinder with concrete or the like.

As shown in FIG. 1, the check flow suppression mass 70 is provided with a check flow suppression valve 72.

The check valve 72 is for preventing sewage from flowing back from the downstream side to the upstream side. In the present embodiment, the backflow suppression valve 72 is provided in the backflow suppression mass 70. The configuration of the backflow suppression mass 70 is not particularly limited as long as it can suppress the backflow of sewage from the downstream side to the upstream side.

The check valve 72 is for allowing the flow of sewage from the upstream side to the downstream side and limiting the flow of sewage from the downstream side to the upstream side. The check valve 72 is swingable with respect to the mass body of the backflow suppression mass 70, and is detachably attached to the check valve 72. The check valve 72 blocks the inflow port when sewage does not flow. When sewage flows from the upstream side, the check valve 72 is pushed up by the sewage. As a result, the backflow suppression mass 70 secures a flow path when sewage flows from the upstream side. Therefore, the sewage flowing from the upstream side flows to the downstream side without being blocked by the check valve 72. On the other hand, when sewage flows back into the backflow suppression mass 70, the flow of the sewage is restricted by the backflow suppression valve 72 that covers the inflow port, and the inflow to the upstream side is restricted.

The backflow suppression valve 72 may be provided in advance on the backflow suppression mass 70, or may be detachable from the backflow suppression mass 70. For example, the backflow suppression valve 72 may be attached to the backflow suppression mass 70 via a connecting member.

The water storage tank 80 (water storage tank, water supply source) is a tank in which water such as rainwater or domestic water is stored. The water storage tank 80 may store relatively clean water that is not mixed with foreign substances such as drinking water. In FIG. 1, the water storage tank 80 is shown as an example of being buried in the ground, but the water storage tank 80 may be installed on the ground.

The water supply pump 82 (pump) is for transporting the water stored in the water storage tank 80 to the water storage device 10. The water supply pump 82 may be of any type, such as a positive displacement type and a non-volumetric type, as long as it can convey the water stored in the water storage tank 80. The water supply pump 82 is prepared when the drainage system S is to function as a response to a disaster, such as when the supply of water to the existing drainage facility 3a is stopped due to a disaster or the like.

The sewage storage tank 84 is a tank for storing sewage discharged from the drainage facility 3. As shown in FIG. 1, the sewage storage tank 84 is arranged outside the building 1 and is buried in the ground. As shown in FIG. 1, the sewage storage tank 84 is connected to the switchable drainage mass 50 via the second pipeline 44. The sewage storage tank 84 stores sewage flowing from the second outlet 56. The sewage storage tank 84 has a sealed space inside. Since the sewage storage tank 84 is a sealed type, the malodor generated from the sewage in the sewage storage tank 84 is prevented from leaking to the outside. The sewage storage tank 84 does not necessarily have to be buried in the ground. The sewage storage tank 84 may be installed on the ground.

<Regarding the discharge of sewage during normal and operating hours>
Next, the operation of the drainage system S during normal operation and operation will be described with reference to FIGS. 9 and 10.

The drainage system S discharges the sewage flowing out from the drainage facility 3 such as the existing drainage facility 3a to the sewage main 4 during normal times (during the water supply / drainage function). Further, the drainage system S supplies water to the pipeline 40 when the supply of water to the drainage facility 3 is stopped due to a water outage or when it becomes necessary to install the temporary drainage facility 3b (when water supply is not possible). The sewage in the pipeline 40 is drained. Further, the drainage system S switches the drainage channel C of the switchable drainage mass 50 when a disaster such as an earthquake or a tsunami occurs and the sewage main 4 or the like is damaged (when drainage is not possible). It is used to discharge the sewage flowing out of the drainage facility 3 to the sewage storage tank 84.

<Regarding normal times>
As shown in FIG. 9, in the normal state, the drainage system S drains the sewage discharged from the drainage facility 3 by the first flow path c1 to the sewage main 4. More specifically, in a normal state, the drainage system S discharges sewage from the existing drainage facility 3a by the first flow path c1 leading to the sewage main 4 via the switchable drainage mass 50.

Further, in a normal state, the water storage tank 80 is closed by the lid member 80a. Further, in the water storage device 10, the operation unit 20 is separated. More specifically, the operation unit 20 of the water storage device 10 is stored in a predetermined place such as the inside of the water storage device 10 in a state where the second pipe body 24 is removed from the first pipe body 22 (FIG. 5 (a). )reference). Therefore, in the normal time when it is not necessary to operate the operation unit 20 of the water storage device 10, the drainage system S operates the operation unit 20 as a mode in which the operation unit 20 fits inside the water storage device 10 when a person comes and goes on the ground. The part 20 can be kept out of the way. Further, if the second pipe body 24 is housed inside the water storage device 10, it is possible to prevent the second pipe body 24 from being lost.

<About operation>
When the water supply is not possible, the drainage system S can allow the stored water to flow from the water storage tank 80 into the pipeline 40 and discharge the sewage from the pipeline 40 to the downstream side.

As shown in FIG. 10, when water supply is not possible, a water supply pump 82 for transporting stored water from the water storage tank 80 to the water storage device 10 is prepared. In addition, a temporary drainage facility 3b will be installed as needed, such as when a disaster occurs. Further, as shown in FIG. 11A, when water cannot be supplied from the drainage system S and it is necessary to supply water from a water supply source such as a water storage tank 80 (during operation), a predetermined place or water storage is performed. The second pipe body 24 housed inside the device 10 is prepared, and the operation unit 20 is in a state (connected state) in which the first pipe body 22 and the second pipe body 24 are connected.

When sewage is discharged from the existing drainage facility 3a or the temporary drainage facility 3b and the sewage is accumulated in the pipeline 40 and needs to be discharged, the stored water is transferred from the water storage tank 80 to the pipeline 40 via the water storage device 10. Inflow and flush the sewage to the downstream side.

More specifically, at the time of operation, the stored water is first flowed into the water storage device 10 in a state where the outlet 14 of the water storage device 10 is closed (see FIG. 11A). At this time, the water storage device 10 can supply the stored water by connecting the water supply pump 82 to the water supply port 36 of the operation unit 20 while the opening 31 is closed by the lid 32. Further, the water storage device 10 can temporarily store a predetermined amount of water inside. In other words, the water storage device 10 can store water for flushing the sewage in the pipeline 40 at once.

As shown in FIG. 11B, after the stored water in the water storage device 10 reaches a certain amount, the operation unit 20 is pulled upward to displace the closed portion 18 that has blocked the outlet 14 upward. .. As a result, the outlet 14 is opened, the stored water in the water storage device 10 flows into the pipeline 40 at once, and the sewage in the pipeline 40 is conveyed to the downstream side. In this way, the drainage system S can send the stored water to the pipeline 40 and flush the sewage in the pipeline 40 from the upstream side to the downstream side in the case of water outage or the like.

Further, as described above, the water storage device 10 can perform an operation of pulling up the operation unit 20 in a state where the upper end portion of the operation unit 20 is arranged on the outside of the water storage device 10. Further, as described above, the water storage device 10 is provided with a stopper portion 29. Therefore, in the water storage device 10, the operation unit 20 is excessively displaced upward so that the closing portion 18 falls off from the mass body 12, or the second pipe body 24 comes off from the lid body 32 to the outside of the water storage device 10. Can be suppressed.

Further, the outlet 14 of the water storage device 10 can be opened and closed by the above-mentioned extremely simple operation. Therefore, even those who do not have specialized knowledge can easily open and close the water storage device 10.

Further, in the drainage system S, when it is difficult to drain sewage to the sewage main 4 due to damage to the sewage main 4 or the like (when drainage is not possible), the drainage destination of the sewage is the sewage main. It is desirable to switch the drainage channel C from 4 to the sewage storage tank 84.

The switching operation of the drainage channel C can be performed, for example, as follows. First, the operator removes the lid 59 covered with the inspection cylinder 58 from the inspection cylinder 58. Next, the handle 63 of the switching member 60 is gripped to pull up the switching member 60, and the switching member 60 is rotated by about 90 degrees in the circumferential direction. As a result, the switching member 60 is held upward with respect to the mass body 52, and the second outlet 56 is maintained in an open state (see FIG. 8B). If the operator cannot reach the handle 63, for example, a rod-shaped body having a hook at the tip may be used to hook the hook on the handle 63 and pull up the switching member 60.

When the drainage channel C is switched to the second channel c2, the sewage flowing out from the drainage facility 3 flows into the mass body 52 from the inflow port 54 of the switchable drainage mass 50. At this time, since the second outlet 56 is released from the switching member 60 and the second outlet 56 is formed at the lower part of the mass body 52, the sewage flowing into the mass body 52 is the second flow. It falls to the outlet 56 and flows out of the mass body 52. The sewage flowing out from the second outlet 56 is discharged to the sewage storage tank 84. As a result, the drainage system S drains the sewage discharged from the drainage facility 3 to the sewage storage tank 84 when drainage to the sewage main 4 is difficult (when drainage is not possible).

In this way, the drainage system S causes the stored water to flow into the pipeline 40 to discharge the sewage to the downstream side when the water supply is not possible, and further switches the drainage flow path C to the sewage storage tank 84 when the drainage is not possible. It can be discharged. In other words, the drainage system S can replace the function of water supply / drainage when the sewerage system becomes unable to supply / drain water.

Although the water storage device and the drainage system S according to the embodiment of the present invention have been described above, the present invention is not limited to the above-described embodiment.

In the operation unit 20 of the water storage device 10 according to the above-described embodiment, an example is shown in which the first pipe body 22 and the second pipe body 24 are connected via a pipe joint 26, but the water storage device of the present invention has a configuration. , Not limited to this. For example, the water storage device of the present invention may be one in which the first pipe body and the second pipe body are directly connected by a screw structure.

Further, in the drainage system S according to the above-described embodiment, an example in which the water storage device 10 is provided on the upstream side of the existing drainage facility 3a is shown, but the drainage system of the present invention is not limited to the above-mentioned embodiment. For example, the drainage system of the present invention discharges the sewage discharged from the existing drainage facility 3a by the water supplied from the normal water pipe when the water supply is functioning, and discharges the sewage discharged from the temporary drainage facility 3b. It may be used to supply and drain water from a water supply source (for example, a water storage tank) different from the water pipe. In that case, the water storage device of the present invention may be provided on the downstream side of the existing drainage facility 3a. Further, the drainage system of the present invention may be provided with a plurality of water storage devices.

Further, although the water storage device 10 and the switchable drainage mass 50 of the drainage system S according to the above-described embodiment are based on a processed and molded resin material, the present invention is not limited thereto. As described above, in the drainage system of the present invention, the mass body of the water storage device 10 or the mass body of the switchable drainage mass may be made of concrete.

Further, in the drainage system S according to the above-described embodiment, an example in which the sewage storage tank 84 is provided is shown, but the drainage system of the present invention is not limited to this. For example, in the drainage system of the present invention, when sewage is discharged through the second flow path, the sewage may be discharged to a sewage main that is different from the sewage main 4, or the sewage may be discharged to a discharge system other than these. It may be discharged.

The drainage system of the present invention can be suitably adopted as a drainage system for draining sewage.

3 Drainage equipment 3b Temporary drainage equipment 10 Water storage device 14 Outlet 18 Closure part 20 Operation part 22 First pipe body 24 Second pipe body 26 Pipe joint 28 Diameter expansion part 29 Stopper part 32 Lid body 34 Insertion part 36 Water supply port 38 Discharge Exit 40 Pipeline 42 First Pipeline (Piping Line)
44 Second pipeline (pipeline)
48 Standing pipe 50 Switchable drainage mass 80 Water storage tank (water supply source, water storage tank)
84 Sewage storage tank S Drainage system X Axial direction C Drainage channel c1 First channel (drainage channel)
c2 Second flow path (drainage flow path)

Claims (9)

A water storage device placed on a pipeline that forms a drainage channel for draining sewage.
A water storage device body that is formed in a cylindrical shape and has an outlet for draining the water introduced inside,
A closed portion that allows the outlet to be closed, and a closed portion.
It has a lid that closes an opening formed so as to communicate with the inside at one end side in the axial direction of the water storage device main body.
By closing the outlet with the closed portion, water can be stored inside the main body of the water storage device.
By moving the closed portion to a position away from the outlet, the outlet can be opened and the water stored in the water storage device main body can be discharged.
It is tubular and has an operation unit that is connected to the closed portion, has a water supply port on one end side, and has a discharge port on the other end side .
By inserting the operation unit into the insertion portion provided in the lid body, the operation unit is held so as to be slidable in the axial direction of the water storage device main body, and is also held.
In the operation unit, in a state where the outlet is closed by the closing portion, the end portion on the water supply port side protrudes to the outside of the water storage device main body, and the end portion on the discharge port side is the inside of the water storage device main body. The water storage device is held so as to open in the water storage device, and can be supplied to the inside of the water storage device main body by taking in water from the water supply port and discharging the water from the discharge port . The operation unit
The first tube attached to the block and
A second tube body connected to the first tube body is provided.
In a state where the first pipe body and the second pipe body are connected, the length from the outlet to the outside of the water storage device is provided.
The water storage device according to claim 1, wherein the first pipe body is housed inside the water storage device in a state where the second pipe body is removed from the first pipe body. The water storage device according to claim 1 or 2, wherein the water storage device has a stopper portion that regulates a displacement range of the operation portion. The operation unit
The first tube attached to the block and
The second tube connected to the first tube and
It is provided with a pipe joint for connecting the first pipe body and the second pipe body.
The water storage device according to claim 3, wherein the stopper portion is formed by the pipe joint. The stopper portion is formed so as to project in the radial direction of the operation portion.
The water storage device according to claim 3 or 4, wherein the movement in the axial direction is restricted at a position where the operation portion abuts on the stopper portion and the lid body. The water storage device according to any one of claims 1 to 5.
A pipeline that forms a drainage channel for draining sewage,
Has a water source and
A drainage system characterized in that the water storage device is provided on the pipeline and on the downstream side of the water supply source. With one or more standing pipes provided on the pipeline,
It has at least one temporary drainage facility that is temporarily attached to the standing pipe.
The drainage system according to claim 6, wherein the vertical pipe provided with the temporary drainage facility is provided on the pipeline and on the downstream side of the water storage device. A sewage storage tank that can store sewage,
It has a switchable drainage mass that enables switching of the drainage flow path.
6. Drainage system. The water supply source is a water tank capable of storing water.
It has a pump that pumps water from the water tank,
The drainage system according to any one of claims 6 to 8, wherein the stored water supplied via the pump is supplied to the inside of the water storage device from the water supply port.

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