JP6348031B2 - Drainage mass and drainage system equipped with it - Google Patents

Description

  The present invention relates to a drainage muffler and a drainage system provided with the same.

  Conventionally, a drainage system for discharging drainage from a drainage facility to a sewage main is known. Examples of the drainage facility include a toilet, a bath, or a kitchen sink. This type of drainage system includes an outflow pipe connecting the drainage facility and the sewage main. Drainage from the drainage facility is discharged to the sewage main through the outflow pipe.

  By the way, when a disaster such as a large-scale earthquake or tsunami occurs, the sewer main may be damaged. If the sewage main is damaged, there is a risk of drainage from the sewage main to the outside.

  Patent Document 1 discloses a socket having a flow path switching function capable of switching the flow path of drainage. This socket includes a vertical tube portion, upstream and downstream normal-time pipelines, emergency pipelines, and a closing door. A vertical cylinder part is a bottomed cylindrical thing opened to upper part. The upstream normal pipe and the downstream normal pipe are provided so as to face the side of the vertical cylinder. The emergency time pipe line projects in one direction from the vertical tube portion at a position below the normal time pipe line. The closing door closes the emergency pipeline. For example, a drainage facility is connected to the upstream normal time pipe, and a sewage main pipe is connected to the downstream normal time pipe. An emergency wastewater treatment facility is connected to the emergency pipeline. In this socket, the emergency line is normally closed by a closing door. For this reason, the drainage discharged from the drainage facility is normally discharged to the sewage main through the normal pipeline. On the other hand, in an emergency such as a disaster, the emergency pipeline is opened by raising the closed door. Therefore, wastewater that has flowed out of the drainage facility at the time of emergency falls naturally in the vertical cylindrical portion and is discharged from the emergency pipeline to the emergency wastewater treatment facility.

Japanese Patent Application Laid-Open No. 7-300897

  However, in the socket described in Patent Document 1, at the time of emergency such as when the sewage main pipe is damaged, the closing door is removed from the vertical tube portion, and the emergency time pipeline is opened. Then, after the sewage main pipe is repaired, the closing door is mounted in the vertical cylinder portion, and the emergency pipeline is closed. For this reason, the closing door is removed from the vertical tube portion at the time of emergency, and it is troubled if the closing door is lost. Therefore, it was necessary to secure a place for storing the closed door.

  The present invention has been made in view of the above points, and the purpose of the present invention is to drain water that can prevent the loss of a member that switches the flow path even after switching the flow path of the drainage. Is to provide a drainage system with

  The drainage basin according to the present invention includes a substantially cylindrical main body and flow path switching means. The main body has an inspection port opened upward, an inlet formed at a side, an inlet through which drainage flows in, a first outlet through which drainage flows out, and formed at the bottom, the drainage A second outlet that flows out. The flow path switching means is detachably provided in the main body, and switches the flow path of drainage flowing through the main body by being attached to and detached from the main body. The flow path switching means is provided in the main body, and the first inflow communicates between the inflow port and the first outflow port so that the waste water flowing in from the inflow port flows into the first outflow port. A switching position, and a second switching position in which the inflow port and the second outflow port are communicated with each other so that wastewater flowing in from the inflow port flows to the second outflow port in a state of being provided in the main body. The position can be changed between. The main body includes a first support portion and a second support portion. The first support portion supports the flow path switching means when the flow path switching means is disposed at the first switching position. The second support portion supports the flow path switching means when the flow path switching means is disposed at the second switching position.

  According to the drainage basin, when the flow path switching means is arranged at the first switching position, the drainage that has flowed into the main body from the inlet is supported by the first support portion to support the flow path switching means. Can flow to the exit. On the other hand, when the flow path switching means is disposed at the second switching position, the flow path switching means is supported by the second support portion, so that the waste water that has flowed into the main body from the inlet can flow to the second outlet. it can. Whether the flow path switching means is disposed at the first switching position or the second switching position, the flow path switching means is further provided in the main body. Therefore, when the flow path of drainage flowing in the main body is switched, it is not necessary to secure a storage place for the flow path switching means outside the main body. Therefore, it is possible to prevent the flow path switching unit from being lost.

  According to a preferred aspect of the present invention, the flow path switching means closes the second outflow port when disposed at the first switching position, and the first flow path switching means when disposed at the second switching position. 2 is a lid that opens the outlet.

  According to the said aspect, the flow path of the waste_water | drain which flows through the inside of a main body can be switched by the simple structure of closing or opening a 2nd outflow port with a cover body. Therefore, the operator can easily switch the drainage channel.

  According to another preferable aspect of the present invention, when the lid is arranged at the second switching position, the lid is arranged at a position overlapping the center point of the inspection port in plan view. .

  The inside of the main body is often dark. For this reason, in the dark, it may be difficult to switch the flow path of drainage flowing through the main body. However, according to the above aspect, when the position of the lid body is changed from the first switching position to the second switching position, the operator covers the lid body so that the lid body overlaps the center point of the inspection port in plan view. May be arranged in the center of the inspection port. Therefore, even if the inside of the main body is dark, it is easy to register the lid at the second switching position. Therefore, it is easier for the operator to switch the flow path of the drainage flowing through the main body.

  According to another preferable aspect of the present invention, the lid includes a groove-shaped invert portion through which drainage flows. The second support portion supports an end portion of the invert portion when the lid body is disposed at the second switching position.

  According to the said aspect, a cover body can be arrange | positioned in a 2nd switching position by arrange | positioning the edge part of the invert part of a cover body in a 2nd support part.

  According to another preferred aspect of the present invention, the second support portion is an arc-shaped support groove provided on the inner peripheral surface of the main body and recessed downward.

  According to the above aspect, when the lid is disposed at the second switching position, even if the lid is to be disposed at a position slightly deviated from the support groove, the lid is positioned correctly along the arc-shaped support groove. It is easy to be guided to. Therefore, even when the lid is arranged at a position slightly deviated from the support groove, the lid can be correctly arranged in the support groove.

  According to another preferable aspect of the present invention, the lid includes a protruding portion that protrudes outward from a side portion of the invert portion. The first support portion supports the protruding portion when the lid body is disposed at the first switching position.

  According to the said aspect, a cover body can be arrange | positioned in a 1st switching position by arrange | positioning the protrusion part of a cover body in a 1st support part.

  According to another preferred aspect of the present invention, two first support portions are provided on the side of the main body so as to face each other across the central axis of the inflow port in plan view. Two of the second support portions are provided below the first support portion.

  According to the said aspect, when a cover body is arrange | positioned in the 1st switching position, a cover body can be stably supported by two 1st support parts. Similarly, when the lid is disposed at the second switching position, the lid can be stably supported by the two second support portions. Moreover, according to the said aspect, the 2nd support part is provided below rather than the 1st support part. Therefore, when changing the position of the lid from the second switching position to the first switching position, the position of the lid is changed by moving the lid in the vertical direction without moving the lid in the front-rear direction and the left-right direction. can do. Therefore, it is possible to easily switch the flow path of the drainage flowing through the main body.

  According to another preferable aspect of the present invention, when the lid is disposed at the first switching position in plan view, both ends of the invert portion of the lid are on a central axis of the inflow port. Be placed. In plan view, when the lid is disposed at the second switching position, both ends of the invert portion of the lid are orthogonal to the center axis of the inflow port and pass through the center point of the inspection port. It is arranged on a straight line.

  According to the above aspect, when changing the position of the lid from the first switching position to the second switching position, or when changing the position of the lid from the second switching position to the first switching position, The position of the lid can be changed by rotating the lid around the center point of the lid and changing the positions of both ends of the invert portion relative to the main body. Therefore, the flow path of the drainage flowing through the main body can be easily switched by a simple method of rotating the lid.

  According to another preferable aspect of the present invention, the inflow port and the first outflow port are formed on a side portion of the main body so as to face each other. The second outlet is provided between the inlet and the first outlet in plan view.

  According to the said aspect, when the cover body is arrange | positioned in the 1st switching position, the waste_water | drain which flowed into the main body from the inflow port easily flows into a 1st outflow port. On the other hand, when the lid is disposed at the second switching position, the waste water that has flowed into the main body from the inflow port easily flows to the second outflow port.

  In the drainage system of the present invention, when any one of the drainage pipes described above, the upstream end is connected to the drainage facility, the downstream end is connected to the inlet, and the upstream end is connected to the first outlet. And an outlet pipe whose downstream end is connected to the sewage main pipe, and a storage tank that is connected to the second outlet and stores drainage.

  According to the drainage system, even if the first outflow pipe or the sewage main pipe is damaged, the drainage system switches the drainage flow path that flows through the main body, so that the drainage facility can be changed to the inflow pipeway. The inflowing wastewater can be discharged to the storage tank through the drainage.

  ADVANTAGE OF THE INVENTION According to this invention, even after switching the flow path of drainage, the drainage can which can prevent that the member which switches a flow path is lost, and a drainage system provided with the same can be provided.

It is a top view of the drainage system concerning an embodiment. It is a front view of the drainage system concerning an embodiment. It is a top view of a drainage basin. It is a front view of a drainage basin. FIG. 5 is a front sectional view of the drainage basin in the VV section of FIG. 3. FIG. It is front sectional drawing of a main body. It is a right side view of the main body. It is a top view of the drain in the state which has arrange | positioned the cover body to the 2nd switching position. It is front sectional drawing of the drainage in the state which has arrange | positioned the cover body to the 2nd switching position. It is a top view of a lid. It is a front view of a lid. It is a side view of a lid. It is a bottom view of a lid. It is sectional drawing of the protrusion part and step part which show the state in which the protrusion part is correctly mounted in the step part. It is sectional drawing of the protrusion part and level | step difference part which show the state in which the protrusion part is not correctly mounted in the level | step difference part. It is a figure which shows the state which the cover body rock | fluctuated with respect to the main body.

  Hereinafter, embodiments of a drainage basin and a drainage system according to the present invention will be described with reference to the drawings. The embodiments described herein are, of course, not intended to limit the present invention in particular. Further, members / parts having the same action are denoted by the same reference numerals, and redundant description is omitted or simplified.

  First, the drainage system 1 according to the present embodiment will be described. FIG. 1 is a plan view of a drainage system 1 according to the present embodiment. FIG. 2 is a front view of the drainage system 1. As shown in FIG. 1, the drainage system 1 is a system through which drainage flows. Here, “drainage” includes sewage and rainwater. “Sewage” is water discharged from toilets, baths, kitchen sinks, etc., and cannot be discharged into the river as it is. In the present embodiment, the drainage facility 5 is a facility that discharges sewage, such as a toilet, a bath, and a kitchen sink. “Rainwater” is water caused by natural phenomena such as rainfall, and can be discharged into a river as it is. Here, the drainage system 1 is a system through which sewage flowing out from the drainage facility 5 flows. However, the drainage system 1 may be a system through which rainwater flows. In this case, for example, the drainage facility 5 is replaced with a gutter in which rainwater is collected, and the sewage main 15 is replaced with a rainwater main. As shown in FIG. 2, the drainage system 1 is embedded in the ground. The drainage system 1 includes a drainage pipe 10, a drainage tank 20 capable of switching a drainage flow path, and a storage tank 70.

  Although not particularly illustrated, the drain pipe 10 is inclined downward toward the downstream. As shown in FIG. 1, the drainage pipe 10 includes an inflow pipe 11, a first outflow pipe 12, and a second outflow pipe 13. The sewage discharged from the drainage facility 5 flows into the inflow conduit 11. The upstream end of the inflow conduit 11 is connected to the drainage facility 5. The downstream end of the inflow conduit 11 is connected to the drain 20. The sewage that has flowed out of the drainage basin 20 flows into the first outflow pipe 12. The upstream end of the first outflow pipe 12 is connected to the drain 20. The downstream end of the first outflow pipe 12 is connected to a sewage main pipe 15 that guides sewage to a sewage treatment plant (not shown). Here, a public mass 16 is provided on the downstream side of the first outflow pipe 12. A public basin 16 is provided between the drain 20 and the sewage main 15.

  The sewage that has flowed out of the drainage basin 20 flows into the second outflow conduit 13. The upstream end of the second outflow pipe 13 is connected to the drain 20. The downstream end of the second outflow conduit 13 is connected to a storage tank 70 that temporarily stores sewage. “Pipe” means a passage through which water flows. The “pipe” may be constituted by a single pipe, or may be constituted by a plurality of pipes and a joint connecting the pipes as in the present embodiment.

  Next, the drainage basin 20 according to this embodiment will be described. The drainage basin 20 is a tank capable of switching the flow path of drainage (sewage in this embodiment). The drainage basin 20 is provided in the middle of the drainage pipe 10. Here, the drainage basin 20 is provided between the downstream end of the inflow conduit 11 and the upstream end of the first outflow conduit 12. FIG. 3 is a plan view of the drain 20. FIG. 4 is a front view of the drain 20. FIG. 5 is a front sectional view of the drain 20 in the VV section of FIG. In the following drawings, the symbols F, Rr, L, and R represent the front, rear, left, and right of the drainage 20, respectively. However, each direction is determined for convenience of explanation, and the present invention is not particularly limited. As shown in FIG. 3, the drainage basin 20 includes a main body 21 and a lid body 26.

  FIG. 6 is a plan view of the main body 21. FIG. 7 is a front sectional view of the main body 21. FIG. 8 is a right side view of the main body 21. 6 to 8 show a state in which the lid body 26 is removed from the main body 21. FIG. As shown in FIG. 7, the main body 21 is substantially cylindrical and has a shape having a space inside. In the present embodiment, as shown in FIG. 4, the main body 21 is constituted by a vertical cylindrical portion 21a, an inflow cylindrical portion 21b, a first outflow cylindrical portion 21c, and a second outflow cylindrical portion 21d. . The vertical cylindrical portion 21a extends in the vertical direction so as to open upward. The inflow cylindrical portion 21b is provided so as to extend laterally (leftward in FIG. 4) from the side surface of the vertical cylindrical portion 21a. The first outflow tubular portion 21c is provided so as to face the inflow tubular portion 21b and extend laterally (rightward in FIG. 4) from the side surface of the vertical tubular portion 21a. The 2nd outflow cylindrical part 21d is provided so that it may extend below from the center part of the bottom face of the vertical cylindrical part 21a. As shown in FIG. 7, the main body 21 is formed with an inspection port 31, an inlet 32, a first outlet 33 and a second outlet 34.

  The inspection port 31 is opened upward in the upper part of the main body 21. In the present embodiment, the inspection port 31 is formed at the upper end of the vertical cylindrical portion 21a of the main body 21. The inspection port 31 is a part where an operator performs maintenance to check whether the inside of the main body 21 is damaged or clogged. The inspection port 31 opens larger than the inflow port 32, the first outflow port 33, and the second outflow port 34. In other words, the inner diameter of the inspection port 31 is longer than the inner diameter of the inlet 32, the inner diameter of the first outlet 33, and the inner diameter of the second outlet 34. Therefore, the operator can easily perform maintenance inside the main body 21 through the inspection port 31 more easily. As shown in FIG. 2, the inspection cylinder 17 is connected to the inspection port 31. Here, the drain 20 is buried in the ground so that the upper end of the inspection cylinder 17 is arranged at substantially the same height as the ground. A lid 18 is disposed at the upper end of the inspection cylinder 17. Normally, the inspection cylinder 17 is closed by the lid 18.

  As shown in FIG. 7, the inlet 32 is provided at the side of the main body 21. The inflow port 32 is open toward the side. In this embodiment, the inflow port 32 is formed in the end surface of the inflow cylindrical part 21b of the main body 21 more and more. The sewage discharged from the drainage facility 5 flows into the inflow port 32. As shown in FIG. 1, the downstream end of the inflow conduit 11 is connected to the inflow port 32. In addition, although the piping which makes a part of inflow pipeline 11 is directly connected to the inflow port 32, the said piping may be indirectly connected to the inflow port 32 via another member. Here, the inflow port 32 is a receiving port into which a pipe is inserted, but may be a differential port into which the pipe is inserted.

  As shown in FIG. 8, the first outlet 33 is provided at the side of the main body 21. As shown in FIG. 7, the 1st outflow port 33 is opening toward the side. Here, the first outlet 33 is disposed on the opposite side of the inlet 32. The first outlet 33 is opposed to the inlet 32. However, the arrangement position of the first outlet 33 is not particularly limited. In this embodiment, the 1st outflow port 33 is formed in the end surface of the 1st outflow cylindrical part 21c of the main body 21 more and more. The sewage flowing through the main body 21 flows out from the first outlet 32. As shown in FIG. 1, the upstream end of the first outlet pipe 12 is connected to the first outlet 33. The first outlet 33 may be directly connected to a pipe that forms a part of the first outflow pipe 12, or the pipe may be indirectly connected via another member. Here, the first outlet 33 is a receiving port, but it may be a difference port.

  As shown in FIG. 7, the second outlet 34 is provided at the bottom of the main body 21. The second outlet 34 is open downward. In this embodiment, the 2nd outflow port 34 is formed in the end surface of the 2nd outflow cylindrical part 21d of the main body 21 more. As shown in FIG. 6, the second outlet 34 is provided at the center of the bottom of the main body 21. The second outlet 34 is provided at a central portion in the inspection port 31 in plan view. The second outlet 34 is provided between the inlet 32 and the first outlet 33 in plan view. As shown in FIG. 7, the second outlet 34 is provided at a position lower than the inlet 32 and the first outlet 33. Here, the inner diameter of the second outlet 34 is the same as the inner diameter of the inlet 32 and the inner diameter of the first outlet 33. However, the inner diameter of the second outlet 34 may be larger or smaller than the inner diameter of the inlet 32 and the inner diameter of the first outlet 33. The shape of the second outlet 34 is a perfect circle. However, the shape of the second outlet 34 is not particularly limited, and may be an ellipse shape. In this case, the direction of the long axis of the second outlet 34 may be parallel to the direction of the central axis L32 of the inlet 32. As a result, when the second outlet 34 is opened, it becomes difficult for sewage that has flowed into the main body 21 from the inlet 32 over the second inlet 34 to flow to the first outlet 33. The sewage flowing through the main body 21 flows out from the second outlet 34. As shown in FIG. 2, the upstream end of the second outlet pipe 13 is connected to the second outlet 34. A storage tank 70 is connected to the second outlet 34 via the second outlet pipe 13. However, the storage tank 70 may be directly connected to the second outlet 34. In this case, the second outflow conduit 13 can be omitted. In this case, the drainage basin 20 is placed on the storage tank 70. Here, although the 2nd outflow port 34 is a receiving port, it may be a difference port. The drainage basin 20 may be disposed inside the storage tank 70. In this case, the inspection port 31 of the drainage 20 may be disposed in the opening part of the upper part of the storage tank 70. As a result, the arrangement space for the drainage basin 20 and the storage tank 70 is reduced, so that the wastewater can be arranged compactly.

  As shown in FIG. 7, in the main body 21, an inclined portion 22 is provided at a connection portion on the inlet 32 side of the connection portion between the vertical cylindrical portion 21 a and the second outflow cylindrical portion 21 d. The inclined portion 22 is steeper as it goes to the second outlet 34. The inclined portion 22 is curved so as to be convex toward the inside of the main body 21. In addition, in the main body 21, the connecting portion 23 on the first outlet 33 side of the connecting portion between the vertical cylindrical portion 21a and the second outflow cylindrical portion 21d is provided with an inclination like the inclined portion 22. Absent. Here, the connection part 23 is a right angle.

  Here, as shown in FIG. 6, inclined surfaces 40 are provided so as to face each other on the inner peripheral surface of the main body 21 and in front and behind the second outlet 34 in a plan view. As shown in FIG. 8, the inclined surface 40 is inclined downward toward the second outlet 34 in a side view. As a result, when sewage rides on the inclined surface 40, the sewage that has ridden can flow to the bottom of the main body 21 along the inclined surface 40. Therefore, it is possible to prevent sewage from accumulating on the inclined surface 40.

  As shown in FIG. 6, the drainage basin 20 includes a step portion 41, a support groove 42, and a confirmation portion 43. The step portion 41 is a part that supports the lid body 26 when the lid body 26 is disposed at a first switching position A (see FIG. 3) described later. A detailed description of the step portion 41 supporting the lid 26 will be described later. The step portion 41 is provided so as to be opposed to the front and rear of the second outlet 34 on the inner peripheral surface of the main body 21 in plan view. Two step portions 41 are provided on the side of the main body 21 so as to face each other across the central axis L32 of the inlet 32 (in other words, the central axis L33 of the first outlet 33) in plan view. . The step portion 41 is provided at the center portion in the inspection port 31 in the axial direction of the inflow port 32 (or the axial direction of the first outflow port 33) in plan view. Here, the step portion 41 is provided closer to the second outlet 34 than the inclined surface 40 in plan view. As shown in FIG. 7, the step portion 41 has a surface 41 a that is inclined downward toward the central axis L <b> 31 of the inspection port 31. As shown in FIG. 6, the step portion 41 has an arc shape. In the present embodiment, the step portion 41 corresponds to the “first support portion” of the present invention.

  The support groove 42 is a part that supports the lid body 26 when the lid body 26 is disposed at a second switching position B (see FIG. 9) described later. A detailed description of the support groove 42 supporting the lid 26 will be described later. Two support grooves 42 are provided so as to be opposed to the front and rear of the second outlet 34 on the inner peripheral surface of the main body 21 in plan view. Here, the support groove 42 is a groove provided in the step portion 41. The support groove 42 is provided closer to the second outlet 34 than the inclined surface 40 in plan view. As shown in FIG. 7, the support groove 42 is provided below (in detail, directly below) the stepped portion 41 in a front view. As shown in FIG. 6, the support groove 42 is further provided in the central portion of the main body 21 in the axial direction of the inflow port 32 (or the axial direction of the first outflow port 33) in plan view. As shown in FIG. 7, the support groove 42 is an arc-shaped groove recessed downward. However, the shape of the support groove 42 is not particularly limited. A plurality of protrusions 45 are provided on the surface of the support groove 42. Here, five protrusions 45 are provided for each support groove 42, but the number of protrusions 45 is not particularly limited. The plurality of protrusions 45 are arranged on the surface of the support groove 42 so as to be equidistant from each other, but the interval is not particularly limited. For example, the interval between the plurality of protrusions 45 may be narrower as it approaches the center of the support groove 42 in plan view. In the present embodiment, the support groove 42 corresponds to the “second support portion” of the present invention.

  As shown in FIG. 3, the confirmation unit 43 is a member for confirming whether or not the lid body 26 is correctly disposed at the stepped portion 41 when the lid body 26 is disposed at the first switching position A. . As shown in FIG. 6, the confirmation portion 43 is provided on the inner peripheral surface of the main body 21 in front and behind the second outlet 34 in a plan view. The confirmation parts 43 are opposed to each other with the second outlet 34 interposed therebetween. Here, the confirmation portion 43 is disposed outside the step portion 41 and in the central portion of the inclined surface 40. A part of the confirmation part 43 protrudes from the inclined surface 40 to the step part 41. The confirmation unit 43 has a plate shape. The confirmation part 43 is good to be formed with the elastic member, and is here made of rubber. The confirmation part 43 is good in the color different from the other site | part of the main body 21 increasingly. For example, the confirmation unit 43 may be colored yellow.

  Next, the lid 26 will be described. As shown in FIG. 3, the lid 26 is detachably provided in the main body 21, and is a member that switches the flow path of sewage flowing through the main body 21 by being attached to and detached from the main body 21. FIG. 9 shows a state in which the lid body 26 is disposed at the second switching position B, and is a plan view of the drain 20. FIG. 10 shows a state in which the lid body 26 is disposed at the second switching position B, and is a front sectional view of the drain 20. 3 to 5 show a state in which the lid body 26 is arranged at the first switching position A. FIG. The lid body 26 can be changed in position between the first switching position A (see FIG. 3) and the second switching position B (see FIG. 9) in the main body 21. As shown in FIG. 5, the first switching position A is a state in which the first switching position A is provided in the main body 21, so that the sewage flowing in from the inlet 32 flows to the first outlet 33. This is the position where the outlet 33 communicates. As shown in FIG. 10, the second switching position B is a state where the second switching position B is provided in the main body 21 so that the sewage flowing from the inlet 32 flows to the second outlet 34. This is the position where the outlet 34 communicates. Here, the lid body 26 is detachably provided at the second outlet 34 of the main body 21. As shown in FIG. 5, the lid body 26 closes the second outlet 34 when arranged at the first switching position A. At this time, as shown in FIG. 3, the lid body 26 is arranged at the central portion in the inspection port 31 in plan view. On the other hand, as shown in FIG. 10, the lid body 26 opens the second outlet 34 when it is disposed at the second switching position B. At this time, as shown in FIG. 9, the lid body 26 is disposed in the central portion in the inspection port 31 in a plan view. That is, before and after the flow path of the sewage flowing through the main body 21 is switched, the lid body 26 is disposed at the central portion in the inspection port 31 in plan view. In the present embodiment, the lid 26 corresponds to the “flow path switching unit” of the present invention.

FIG. 11 is a plan view of the lid body 26. FIG. 12 is a front view of the lid body 26. FIG. 13 is a side view of the lid body 26. FIG. 14 is a bottom view of the lid body 26. 11 to 14, reference signs F, Rr, L, and R indicate the direction of the lid body 26 at the first switching position A. As shown in FIG. 12, the lid body 26 includes an invert part 51, a protruding part 52, a grip part 53, a fitting convex part 54, and an overflow prevention plate 55.

  As shown in FIG. 5, when the lid body 26 is disposed at the first switching position A, the invert portion 51 serves as a flow path for flowing sewage flowing into the main body 21 from the inflow port 32 to the first outflow port 33. It is. As shown in FIG. 13, the invert portion 51 is formed in a substantially U shape so as to be smoothly continuous with the bottom surface of the inflow port 32 and the bottom surface of the first outflow port 33. Here, as shown in FIG. 11, the invert part 51 is a straight groove. However, the invert portion 51 may be a groove that is partially curved. When the lid body 26 is disposed at the second switching position B, the end portion 51 a of the invert portion 51 is further disposed in the support groove 42 of the main body 21. Therefore, the outer peripheral surface of the end portion 51 a of the invert portion 51 may have a shape corresponding to the support groove 42. Here, the outer peripheral shape of the invert portion 51 is an arc shape.

  As shown in FIG. 3, the protruding portion 52 is a portion that is supported by the step portion 41 when the lid body 26 is disposed at the first switching position A. As shown in FIG. 11, the protruding portion 52 protrudes outward from the side portion of the invert portion 51. Specifically, as shown in FIG. 13, the protruding portion 52 is provided in the invert portion 51 so as to protrude outward from the upper ends of the front portion and the rear portion of the invert portion 51. As shown in FIG. 3, the protruding portion 52 has a shape that matches the stepped portion 41 of the main body 21. However, the protruding portion 52 may not have a shape that matches the stepped portion 41, and in this case, the protruding portion 52 is preferably smaller than the stepped portion 41. Here, the protrusion 52 is plate-shaped and has an arc shape.

  As shown in FIG. 11, the grip part 53 is a part that is used when an operator switches the position of the lid body 26 and can be gripped. The grip part 53 is disposed so as to straddle the invert part 51. The grip part 53 is provided in the central part of the invert part 51 in the flow path direction of the invert part 51. The shape of the grip part 53 is not particularly limited. Here, as shown in FIG. 13, the grip portion 53 has a shape that bridges the two upper ends of the invert portion 51. The grip part 53 may be integrated with the invert part 51 or may be a separate body. Here, as shown in FIG. 11, reinforcing members 53 a are provided at both end portions 51 a of the invert portion 51. The reinforcing member 53 a is provided so as to bridge the upper right ends of the invert portions 51 and the upper left ends of the invert portions 51. By this reinforcing member 53a, the invert part 51 can be made difficult to deform. Since the reinforcing member 53a can be gripped, the reinforcing member 53a may be used as a part used when the operator switches the position of the lid body 26, similarly to the grip portion 53.

  As shown in FIG. 5, the fitting convex portion 54 is a portion that closes the second outlet 34 when the lid body 26 is disposed at the first switching position A. Here, the fitting convex part 54 is a site | part which can be fitted to the 2nd outflow cylindrical part 21d of the main body 21 more and more. As shown in FIG. 14, the fitting convex portion 54 is substantially cylindrical. In the present embodiment, as shown in FIG. 13, a rubber seal member 54 a is provided on the outer peripheral surface of the fitting convex portion 54. A seal between the second outflow cylindrical portion 21d and the fitting convex portion 54 is achieved by the seal member 54a.

  As shown in FIG. 10, when the lid body 26 is arranged at the second switching position B, the overflow prevention plate 55 causes the sewage that has flowed into the main body 21 from the inlet 32 beyond the second outlet 34. This is a part for preventing the first outlet 33 from flowing. As shown in FIG. 12, the overflow prevention plate 55 extends downward from the central portion of the bottom surface of the invert portion 51. As shown in FIG. 14, the overflow prevention plate 55 is disposed so as to be surrounded by the fitting convex portion 54. As shown in FIG. 12, the overflow prevention plate 55 is formed of a flat plate-like member whose width becomes shorter toward the lower part.

  Next, the positional relationship between the lid body 26 and the main body 21 when the lid body 26 is disposed at the first switching position A and the second switching position B will be described in detail. As shown in FIG. 3, when the lid body 26 is disposed at the first switching position A, the protruding portion 52 of the lid body 26 is further disposed at the stepped portion 41 of the main body 21. The lid body 26 is supported by the step portion 41. At this time, the lid body 26 is disposed at a central portion in the inspection port 31 in plan view. The lid body 26 is disposed at a position overlapping the center point L31 of the inspection port 31 in plan view. Here, the central axis L26 of the lid body 26 and the central axis L31 of the inspection port 31 coincide with each other. At this time, the invert part 51 of the lid body 26 communicates the inflow port 32 and the first outflow port 33, and serves as a sewage flow path. Both ends 51a of the invert part 51 are disposed on the central axis L32 of the inflow port 32 (in other words, the central axis L33 of the first outflow port 33). As shown in FIG. 5, the fitting convex portion 54 of the lid body 26 is further fitted to the second outflow cylindrical portion 21 d of the main body 21. Therefore, when the lid body 26 is disposed at the first switching position A, the lid body 26 is increasingly fixed to the main body 21 and cannot swing. At this time, the overflow prevention plate 55 is disposed such that its surface faces in the front-rear direction. At this time, as shown in FIG. 4, the lower portion of the overflow prevention plate 55 projects downward from the second outlet 34.

  In the present embodiment, as described above, when the lid body 26 is disposed at the first switching position A, it is confirmed whether the protruding portion 52 of the lid body 26 is correctly placed on the stepped portion 41 of the main body 21. 43. FIG. 15 is a cross-sectional view of the protrusion 52 and the step 41 showing a state in which the protrusion 52 is correctly placed on the step 41. FIG. 16 is a cross-sectional view of the protruding portion 52 and the stepped portion 41 showing a state in which the protruding portion 52 is not correctly placed on the stepped portion 41.

  As shown in FIG. 15, when the protruding portion 52 of the lid body 26 is correctly placed on the stepped portion 41, the tip end portion 43 a of the confirmation portion 43 is located above the protruding portion 52. In this case, as shown in FIG. 3, the front end portion 43a of the confirmation unit 43 can be visually observed in a plan view. On the other hand, as shown in FIG. 16, when the protruding portion 52 is not correctly placed on the stepped portion 41 and is placed slightly deviated with respect to the stepped portion 41, the confirmation portion 43 is bent. Therefore, the tip portion 43 a of the confirmation portion 43 is located between the protruding portion 52 and the step portion 41. In this case, the tip end portion 43a of the confirmation unit 43 cannot be viewed in plan view. As described above, in the present embodiment, it is possible to determine whether or not the lid body 26 is correctly arranged at the first switching position A depending on whether or not the distal end portion 43a of the confirmation unit 43 is visible in a plan view. it can.

  As shown in FIG. 9, when the lid body 26 is disposed at the second switching position B, the end portion 51 a of the invert portion 51 of the lid body 26 is placed on the support groove 42 of the main body 21. At this time, the lid body 26 is supported by the support groove 42. As shown in FIG. 10, when the lid body 26 is disposed at the second switching position B, the lid body 26 is disposed at a higher position than at the first switching position A (see FIG. 5). At this time, similarly to the case where the lid 26 is arranged at the first switching position A, the lid body 26 is arranged at the central portion in the inspection port 31 in a plan view as shown in FIG. It is arranged at a position overlapping the center point L31 of 31. Here, the central axis L26 of the lid body 26 and the central axis L31 of the inspection port 31 coincide with each other. At this time, both ends of the invert part 51 are orthogonal to the central axis L32 of the inflow port 32 (in other words, the central axis L33 of the first outflow port 33) in plan view and pass through the central point L31 of the inspection port 31. It arrange | positions on the straight line L1.

  At this time, as shown in FIG. 10, the overflow prevention plate 55 is arranged so that the surface thereof faces in the left-right direction. The fitting convex portion 54 of the lid body 26 is positioned higher than the second outflow cylindrical portion 21d of the main body 21 and is not fitted into the second outflow cylindrical portion 21d. Here, the lid body 26 is increasingly supported by the main body 21 only when the end portion 51 a of the invert portion 51 is placed in the support groove 42. The lid 26 can swing relative to the main body 21. The position and angle of the lid body 26 can be changed along the support groove 42. FIG. 17 is a view showing a state where the lid body 26 is swung with respect to the main body 21. When the sewage flows into the main body 21 from the inlet 32 in the state where the lid 26 is disposed at the second switching position B, the sewage passes over the lid 26 above the second outlet 34. It strikes against the flow prevention plate 55. At this time, the lid body 26 rotates toward the first outlet 33 with the support groove 42 as an axis. And the lower part of the overflow prevention board 55 contacts the connection part 23 by the side of the 1st outflow cylindrical part 21c among the connection parts of the vertical cylindrical part 21a and the 2nd outflow cylindrical part 21d. The first inflow port 33 is closed by the overflow prevention plate 55. By this, when the lid body 26 is arranged at the second switching position B, the sewage that has flowed into the main body 21 from the inlet 32 flows beyond the second outlet 34 to the first outlet 33. Can be prevented.

  As shown in FIG. 2, the storage tank 70 is a tank that stores sewage discharged from the drainage facility 5. The storage tank 70 is constituted by a tank and has a space sealed inside. A drain port 71 is formed in the upper part of the side surface of the storage tank 70. The drain outlet 71 is connected to the downstream end of the second outlet pipe 13, and the second outlet 34 of the drain 20 is connected via the second outlet pipe 13.

  A cylinder 78 protrudes from the upper surface of the storage tank 70 in the vertical direction. The cylinder 78 is provided on the upper surface of the storage tank 70 so that the upper end is substantially the same height as the ground. An operator can maintain and inspect the inside of the storage tank 70 through the cylinder 78. Note that the upper portion of the cylinder 78 is closed by a lid 79 in a normal state.

  Next, a method for using the drainage system 1 and the drainage basin 20 according to the present embodiment will be described. As shown in FIG. 1, the drainage system 1 normally discharges sewage discharged from the drainage facility 5 to the sewage main 15, and when a disaster such as an earthquake or tsunami occurs and the sewage main 15 is damaged, It is used so that the flow path of the sewage flowing through the drainage basin 20 is switched and the sewage flowing out from the drainage facility 5 is discharged to the storage tank 70. In the following description, a normal usage mode is referred to as a normal mode, and a disaster usage mode is referred to as a disaster mode.

  In the normal mode, as shown in FIG. 3, the lid body 26 is disposed in the main body 21 at the first switching position A where the inlet 32 and the first outlet 33 communicate with each other. Specifically, the fitting convex portion 54 of the lid body 26 is further fitted into the second outflow cylindrical portion 21 d of the main body 21, and the protruding portion 52 of the lid body 26 is further placed on the stepped portion 41 of the main body 21.

  In the normal mode, as shown in FIG. 1, the sewage flowing out from the drainage facility 5 flows into the main body 21 from the inlet 32 of the drainage basin 20 after flowing through the inflow conduit 11. As shown in FIG. 3, the sewage that has flowed into the main body 21 passes through the invert portion 51 of the lid body 26 and flows out of the main body 21 from the first outlet 33. At this time, as shown in FIG. 5, the second outlet 34 is closed by the lid body 26. Therefore, the sewage in the main body 21 does not flow to the second outlet 34. As shown in FIG. 2, the sewage flowing out from the first outlet 33 flows through the first outlet pipe 12 and is discharged to the sewage main pipe 15. The sewage discharged to the sewage main 15 is guided to a sewage treatment plant or the like and purified.

  In the disaster mode, the position of the lid body 26 is changed from the first switching position A to the second switching position B where the inlet 32 and the second outlet 34 communicate with each other. For example, the position of the lid body 26 can be changed as follows. First, the operator removes the lid 18 placed on the inspection cylinder 17. Next, as shown in FIG. 5, the operator holds the grip portion 53 of the lid body 26 and pulls up the lid body 26. Then, as shown in FIG. 9, the operator rotates the lid 26 by 90 degrees so that the end 51 a of the inverted portion 51 of the lid 26 is positioned above the support groove 42 of the main body 21. The direction of rotation at this time may be clockwise or counterclockwise. The operator places the lid body 26 at the second switching position B by placing the end portion 51 a of the invert portion 51 in the support groove 42.

  In the disaster mode, as shown in FIG. 1, the sewage flowing out from the drainage facility 5 flows into the main body 21 from the inlet 32 after flowing through the first outlet pipe 11. As shown in FIG. 17, the sewage flowing into the main body 21 collides with the overflow prevention plate 55 of the lid body 26, so that the lid body 26 rotates to the first outlet 33 side around the support groove 42. To do. And the lower part of the overflow prevention board 55 contacts the connection part 23 of the vertical cylindrical part 21a and the 2nd outflow cylindrical part 21d. As a result, the first outlet 33 is blocked by the overflow prevention plate 55. Therefore, more and more sewage in the main body 21 flows toward the second outlet 34 along the inclined portion 22 of the main body 21 and does not flow to the first outlet 33. Thereafter, as shown in FIG. 2, the sewage flows out of the main body 21 from the second outlet 34. The sewage flowing out from the second outlet 34 is discharged to the storage tank 70 through the second outflow pipe 13 and stored in the storage tank 70. The sewage stored in the storage tank 70 is sucked up by, for example, a suction pump. In this case, the operator removes the lid 79 that closes the upper portion of the cylinder 78 provided on the upper surface of the storage tank 70. Then, the suction pump is inserted into the storage tank 70 through the cylinder 78. Then, the sewage stored in the storage tank 70 is sucked up by the suction pump.

  As described above, in this embodiment, even if the second outflow pipe 12 or the sewage main pipe 15 is damaged, the inflow pipe line is connected to the inflow pipe from the drainage facility 5 by switching the flow path of the sewage with the drainage basin 20. 11 can be discharged from the second outlet pipe 13 to the storage tank 70 through the drain 20.

  As shown in FIG. 3, when the lid body 26 is arranged at the first switching position A, the sewage that has flowed into the main body 21 from the inflow port 32 by supporting the lid body 26 by the step portion 41 of the main body 21. Can flow to the first outlet 33. On the other hand, as shown in FIG. 9, when the lid body 26 is disposed at the second switching position B, the lid body 26 is supported by the support groove 42, so that the sewage that has flowed into the main body 21 from the inflow port 32 is increased. Two outlets 34 can flow. Even when the lid 26 is arranged at the first switching position A, which is the normal arrangement position, even when the lid 26 is arranged at the second switching position B, which is the arrangement position at the time of disaster, The lid body 26 is provided in the main body 21. Therefore, when the flow path of the sewage flowing through the main body 21 is switched, it is not necessary to secure a storage place for the lid 26 outside the main body 21. Therefore, it is possible to prevent the lid body 26 from being lost.

  The lid 26 closes the second outlet 34 when placed at the first switching position A as shown in FIG. 5, and when placed at the second switching position B as shown in FIG. The second outlet 34 is opened. With a simple configuration in which the second outlet 34 is closed or opened by the lid 26, the flow path of sewage flowing in the main body 21 can be switched. Therefore, the worker can easily switch the flow path of the sewage flowing in the main body 21.

  As shown in FIG. 3, when the lid body 26 is disposed at the first switching position A, the lid body 26 is disposed at a position overlapping the center point L31 of the inspection port 31 in plan view. Similarly, as illustrated in FIG. 9, when the lid body 26 is disposed at the second switching position B, the lid body 26 is disposed at a position overlapping the center point L31 of the inspection port 31 in plan view. Here, when the lid body 26 is disposed at the first switching position A and when the lid body 26 is disposed at the second switching position B, the central axis L26 of the lid body 26 is the inspection port in plan view. This coincides with the center point L31 of 31. The inside of the main body 21 is often dark. For this reason, it may be difficult to switch the flow path of sewage flowing in the main body 21 in the dark. However, according to the present embodiment, when the position of the lid body 26 is changed from the first switching position A to the second switching position B, and when the second switching position B is changed to the first switching position A, The operator may arrange the lid body 26 at the central portion in the inspection port 31 so that the central axis L26 of the lid body 26 overlaps the center point L31 of the inspection port 31 in plan view. Therefore, even if the inside of the main body 21 is dark, it is easy to register the lid 26 at the first switching position A and the second switching position B without worrying about the direction of the sewage flow path. Therefore, it is easier for the operator to switch the flow path of the sewage flowing in the main body 21.

  As shown in FIG. 3, when the lid body 26 is disposed at the first switching position A, the step portion 41 of the main body 21 supports the protruding portion 52 of the lid body 26. Accordingly, the lid body 26 can be arranged at the first switching position A by a simple method of arranging the protruding portion 52 of the lid body 26 at the step portion 41.

  As shown in FIG. 7, the step portion 41 has a surface 41 a that is inclined downward toward the central axis L <b> 31 of the inspection port 31. As a result, when sewage flows into the stepped portion 41, the sewage flows downward along the surface 41a. Therefore, it is possible to prevent sewage from collecting in the step portion 41.

  As shown in FIG. 9, when the lid body 26 is arranged at the second switching position B, the support groove 42 of the main body 21 supports the end portion 51 a of the invert portion 51. Accordingly, the lid body 26 can be arranged at the second switching position B by a simple method of arranging the end portion 51 a of the invert portion 51 of the lid body 26 in the support groove 42.

  As shown in FIG. 7, the support groove 42 is an arc-shaped groove that is provided on the inner peripheral surface of the main body 21 and is recessed downward. Thus, when the lid body 26 is arranged at the second switching position B, the lid body 26 is arranged along the arc-shaped support groove 42 even if the lid body 26 is arranged at a position slightly deviated from the support groove 42. To the correct placement position. Therefore, even if the lid body 26 is slightly deviated from the support groove 42, the lid body 26 can be correctly arranged in the support groove 42.

  A plurality of projections 45 are provided in the support groove 42. As a result, the contact area between the invert portion 51 of the lid body 26 and the support groove 42 can be reduced. Therefore, since the frictional resistance between the invert portion 51 and the support groove 42 can be reduced, the lid body 26 can easily move along the support groove 42. Even when a foreign object such as paper is sandwiched between the lid body 26 and the support groove 42, the lid body 26 easily moves along the support groove 42.

  As shown in FIG. 6, the stepped portion 41 is provided on the side portion of the main body 21 so as to face the central axis L32 of the inflow port 32 in plan view. As shown in FIG. 7, the support groove 42 is provided below the step portion 41. As a result, as shown in FIG. 3, when the lid body 26 is disposed at the first switching position A, the lid body 26 can be stably supported by the two step portions 41. Similarly, as shown in FIG. 9, when the lid body 26 is disposed at the second switching position B, the lid body 26 can be stably supported by the two support grooves 42. In the present embodiment, when the arrangement position of the lid body 26 is changed from the first switching position A to the second switching position B or from the second switching position B to the first switching position A, the lid body 26 is moved in the front-rear direction. The arrangement position of the lid body 26 can be changed by moving the lid body 26 in the vertical direction without moving in the left-right direction. Therefore, the flow path of the sewage flowing through the main body 21 can be easily switched.

  As shown in FIG. 3, when the lid body 26 is disposed at the first switching position A, both ends 51a of the invert portion 51 of the lid body 26 are disposed on the central axis L32 of the inflow port 32 in plan view. Yes. On the other hand, as shown in FIG. 9, when the lid body 26 is disposed at the second switching position B, both ends 51a of the invert portion 51 of the lid body 26 are orthogonal to the central axis L32 of the inflow port 32 and are inspected. It is arranged on a straight line L1 passing through the center point L31 of the mouth 31. Accordingly, when the arrangement position of the lid body 26 is changed from the first switching position A to the second switching position B, or the arrangement position of the lid body 26 is changed from the second switching position B to the first switching position A. When the lid body 26 is rotated 90 degrees around the center point L26 of the lid body 26 in plan view, the positions of the both end portions 51a of the invert portion 51 with respect to the main body 21 are changed, thereby disposing the lid body 26. The position can be changed. Therefore, the flow path of the sewage flowing in the main body 21 can be easily switched by a simple method of rotating the lid body 26. Further, the direction in which the lid 26 is rotated may be clockwise or counterclockwise. Accordingly, the flow path of sewage flowing in the main body 21 can be switched by simply rotating the lid body 26 by 90 degrees without being aware of the orientation of the lid body 26.

  As shown in FIG. 11, the lid body 26 is disposed so as to straddle the invert portion 51 and includes a grip portion 53 that can be gripped by an operator. This makes it easy for an operator to lift the lid 26 using the grip portion 53. Therefore, the flow path of the sewage flowing in the main body 21 can be easily switched by the lid body 26.

  As shown in FIG. 6, the inflow port 32 and the first outflow port 33 are formed on the side portion of the main body 21 so as to face each other. The second outlet 34 is provided between the inlet 32 and the first outlet 33 in plan view. Thus, when the lid body 26 is arranged at the first switching position A, the sewage that has flowed into the main body 21 from the inflow port 32 easily flows into the first outflow port 33. On the other hand, when the lid body 26 is disposed at the second switching position B, the sewage that has flowed into the main body 21 from the inflow port 32 easily flows into the second outflow port 34.

  The drainage system 1 according to this embodiment has been described above. However, the drainage system according to the present invention is not limited to the drainage system 1 according to the present embodiment, and can be implemented in various other forms.

<Other embodiments>
In the said embodiment, as shown in FIG. 3, when the cover body 26 was arrange | positioned in the 1st switching position A, the cover body 26 was arrange | positioned in the center part in the inspection port 31 in planar view. However, when the lid body 26 is disposed at the first switching position A, the lid body 26 may be disposed to the left or right of the center point L31 of the inspection port 31 in plan view. In this case, the step portion 41 of the main body 21 may be arranged on the left or right side of the center point L31 of the inspection port 31 in plan view.

  Similarly, in the above embodiment, as shown in FIG. 9, when the lid body 26 is disposed at the second switching position B, the lid body 26 is disposed at the central portion in the inspection port 31 in plan view. It was. However, when the lid body 26 is disposed at the second switching position B, the lid body 26 may be disposed on the left or right side of the center point L31 of the inspection port 31 in plan view. At this time, the support groove 42 may be arranged to the left or right of the center point L31 of the inspection port 31 in plan view.

  In the above embodiment, as shown in FIG. 3, when the lid body 26 is disposed at the first switching position A, the protruding portion 52 of the lid body 26 is placed on the stepped portion 41 of the main body 21, and the projection The part 52 was supported by the step part 41. However, the step portion 41 does not have to support the protruding portion 52. For example, the step portion 41 may be formed in the second outflow cylindrical portion 21d of the main body 21 and the step portion 41 may support the fitting convex portion 54. In this case, the protrusion 52 can be omitted.

  In the above embodiment, when the lid body 26 is disposed at the first switching position A, two step portions 41 that support the lid body 26 are provided, and when the lid body 26 is disposed at the second switching position B. Two support grooves 42 for supporting the lid 26 were provided. However, the number of the step portions 41 and the support grooves 42 is not particularly limited, and may be one by one or three or more. Further, the number of the step portions 41 and the support grooves 42 may be different from each other.

DESCRIPTION OF SYMBOLS 1 Drainage system 11 Inflow line 12 1st outflow line 13 2nd outflow line 20 Drain 21 Mass body 26 Lid (flow path switching means)
31 Inspection Port 32 Inlet 33 First Outlet 34 Second Outlet 41 Stepped Part (First Supporting Part)
42 Support groove (second support part)
45 Projection 51 Inverted part 52 Projected part 53 Gripping part 70 Storage tank

Claims (10)

An inspection port opened upward, an inflow port formed on the side and into which drainage flows, a first outflow port formed on the side and from which drainage flows out, and a second flow formed at the bottom and from which drainage flows out An approximately cylindrical shaped main body having an outlet, and
A flow path switching means that is detachably provided in the main body, and switches the flow path of drainage flowing through the main body by being attached to and detached from the main body.
With
The flow path switching means is provided in the main body, and the first inflow communicates between the inflow port and the first outflow port so that the waste water flowing in from the inflow port flows into the first outflow port. A switching position, and a second switching position in which the inflow port and the second outflow port are communicated with each other so that wastewater flowing in from the inflow port flows to the second outflow port in a state of being provided in the main body. The position can be changed between
The flow path switching means changes the position between the first switching position and the second switching position by separating from the main body, and switches the flow path of drainage.
The main body is
A first support portion for supporting the flow path switching means when the flow path switching means is disposed at the first switching position;
A second support portion for supporting the flow path switching means when the flow path switching means is disposed at the second switching position;
With drainage.   The flow path switching means is a lid that closes the second outlet when disposed at the first switching position and opens the second outlet when disposed at the second switching position. The drainage according to claim 1. An inspection port opened upward, an inflow port formed on the side and into which drainage flows, a first outflow port formed on the side and from which drainage flows out, and a second flow formed at the bottom and from which drainage flows out An approximately cylindrical shaped main body having an outlet, and
A flow path switching means that is detachably provided in the main body, and switches the flow path of drainage flowing through the main body by being attached to and detached from the main body.
With
The flow path switching means is provided in the main body, and the first inflow communicates between the inflow port and the first outflow port so that the waste water flowing in from the inflow port flows into the first outflow port. A switching position, and a second switching position in which the inflow port and the second outflow port are communicated with each other so that wastewater flowing in from the inflow port flows to the second outflow port in a state of being provided in the main body. The position can be changed between
The main body is
A first support portion for supporting the flow path switching means when the flow path switching means is disposed at the first switching position;
A second support portion for supporting the flow path switching means when the flow path switching means is disposed at the second switching position;
With
The flow path switching means is a lid that closes the second outlet when disposed at the first switching position and opens the second outlet when disposed at the second switching position. ,
When the lid body is disposed at the second switching position, the lid body is disposed at a position overlapping the center point of the inspection port in plan view. The lid includes a groove-shaped invert portion through which drainage flows,
The said 2nd support part drains as described in Claim 2 or 3 which supports the edge part of the said invert part, when the said cover body is arrange | positioned in the said 2nd switching position. An inspection port opened upward, an inflow port formed on the side and into which drainage flows, a first outflow port formed on the side and from which drainage flows out, and a second flow formed at the bottom and from which drainage flows out An approximately cylindrical shaped main body having an outlet, and
A flow path switching means that is detachably provided in the main body, and switches the flow path of drainage flowing through the main body by being attached to and detached from the main body.
With
The flow path switching means is provided in the main body, and the first inflow communicates between the inflow port and the first outflow port so that the waste water flowing in from the inflow port flows into the first outflow port. A switching position, and a second switching position in which the inflow port and the second outflow port are communicated with each other so that wastewater flowing in from the inflow port flows to the second outflow port in a state of being provided in the main body. The position can be changed between
The main body is
A first support portion for supporting the flow path switching means when the flow path switching means is disposed at the first switching position;
A second support portion for supporting the flow path switching means when the flow path switching means is disposed at the second switching position;
With
The flow path switching means is a lid that closes the second outlet when disposed at the first switching position and opens the second outlet when disposed at the second switching position. ,
The lid includes a groove-shaped invert portion through which drainage flows,
The second support portion supports an end portion of the invert portion when the lid body is disposed at the second switching position,
The second support part is provided on the inner peripheral surface of the main body and drains, which is an arc-shaped support groove recessed downward. The lid includes a protruding portion protruding outward from a side portion of the invert portion,
The said 1st support part drains as described in Claim 4 or 5 which supports the said protrusion part, when the said cover body is arrange | positioned in the said 1st switching position. Two first support portions are provided on the side of the main body so as to face each other across the central axis of the inflow port in plan view,
The said 2nd support part is drained as described in Claim 6 provided two below the said 1st support part.   In plan view, when the lid is disposed at the first switching position, both ends of the invert portion of the lid are disposed on the central axis of the inflow port, and the lid is at the second switching position. The both ends of the invert part of the lid are arranged on the straight line which intersects perpendicularly with the central axis of the inflow mouth, and passes through the central point of the inspection mouth. Drained. The inflow port and the first outflow port are formed on the side of the main body so as to face each other,
The drain according to any one of claims 1 to 8, wherein the second outlet is provided between the inlet and the first outlet in a plan view. When the drainage according to any one of claims 1 to 9,
An inflow conduit having an upstream end connected to the drainage facility and a downstream end connected to the inflow port;
An outflow conduit having an upstream end connected to the first outlet and a downstream end connected to a sewage main pipe;
A storage tank connected to the second outlet;
With drainage system.

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