JP2016061092A - Catch basin and drainage system with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a catch basin capable of enhancing working efficiency of an operator when switching flow passages of drainage.SOLUTION: A catch basin 20A comprises: a basin body 21 which is almost cylindrical in shape and has an inspection port 31, an inflow port 32, a first outflow port 33 and a second outflow port 34; an inspection cover 18 which can open and close the inspection port 31; a cover body 26 which is installed in the basin body 21 in a manner that can open and close the second outflow port 34 and can be switched between a first switching position A to communicate the inflow port 32 with the first outflow port 33 by closing the second outflow port 34 and a second switching position B to communicate the inflow port 32 with the second outflow port 34 by opening the second outflow port 34; and a connection member 60 which connects the inspection cover 18 and the cover body 26.SELECTED DRAWING: Figure 15

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. Wastewater discharged 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-side and downstream-side normal-time pipelines protrude from the side of the vertical cylinder so as to face each other with the vertical cylinder interposed therebetween. 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 pipe, and a sewage main pipe is connected to the downstream normal 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, the wastewater discharged from the drainage facility at the time of emergency falls naturally in the vertical cylinder portion and is discharged from the emergency pipeline to the emergency wastewater treatment facility.

Japanese Patent Application Laid-Open No. 7-300897

  By the way, the socket described in Patent Document 1 is used by being installed at the bottom of a manhole. Normally, the manhole is covered with a lid. Therefore, at the time of emergency, first, after removing the lid of the manhole, the conduit for emergency was opened by pulling up the closing door. That is, at the time of emergency, the worker opened the emergency pipeline through two stages of work. However, there are many urgent cases when switching the drainage flow path during emergency. Therefore, it is desirable to improve work efficiency by reducing the work time of the worker.

  The present invention has been made in view of such a point, and an object of the present invention is to provide a drainage drain that can improve the work efficiency of an operator when switching the drainage flow path, and a drainage system including the drainage drain. That is.

  The drainage basin according to the present invention comprises a substantially cylindrical main body, an inspection lid, a lid, and a connecting member. The main body is an inspection port opened upward, an inlet formed on the side, into which drainage flows, a first outlet formed on the side, from which drainage flows, and a side or bottom. A second outlet that is formed at a position below the first outlet and from which drainage flows out. The inspection lid is provided at the inspection opening so as to be freely opened and closed. The lid body is provided in the main body so that the second outlet can be opened and closed, and the second outlet is closed so that drainage flows from the inlet to the first outlet. A first switching position where the inlet and the first outlet communicate with each other; and the second outlet is opened so that drainage flows from the inlet to the second outlet. The position can be changed between the second switching position where the two outlets communicate with each other. The connecting member connects the inspection lid and the lid.

  According to the drainage basin, when the lid is disposed at the first switching position, the second outlet is closed and the inlet and the first outlet are communicated. Therefore, the wastewater that has flowed into the main body from the inflow port flows out from the first outflow port. When the lid is disposed at the second switching position, the second outlet is opened, and the inlet and the second outlet communicate. Therefore, the wastewater that has flowed into the main body from the inflow port flows out from the second outflow port. According to the drainage basin, the inspection lid and the lid are connected by a connecting member. Therefore, when changing the position of the lid from the first switching position to the second switching position, the lid moves in conjunction with lifting the inspection lid. As a result, the second outlet is opened. Therefore, as the operator operates the inspection lid, the lid body can be moved to open the second outlet. Therefore, the work time by the worker can be reduced, and work efficiency is improved.

  According to a preferred aspect of the present invention, the second outlet is formed at the bottom of the main body.

  According to the said aspect, a 2nd outflow port is open | released or closed, when a cover body moves to an up-down direction. Therefore, when the position of the lid is changed from the first switching position to the second switching position, the lid is easy to move in conjunction with the operator lifting the inspection lid upward. Therefore, it is easy to open the second outlet by moving the inspection lid upward.

  According to another preferable aspect of the present invention, the second outlet is disposed in the inspection port in plan view.

  According to the above aspect, when changing the position of the lid from the first switching position to the second switching position, when the operator lifts the inspection lid upward, the lid body that moves upward in conjunction with the inspection lid is the main body. You can make it harder to hit the inside. Therefore, the second outlet can be easily opened.

  According to another preferable aspect of the present invention, the connecting member is formed by a bendable string-like member. One end of the connecting member is provided on the inspection lid. The other end of the connecting member is provided on the lid. The length of the connecting member is such that when the lid is arranged at the first switching position, the lid body to which the other end of the connecting member is connected from a part of the inspection lid to which one end of the connecting member is connected. Longer than the distance to the site.

  When an impact is applied to the connecting member when the lid is disposed at the first switching position, the connecting member may move due to the impact. According to the said aspect, the length of a connection member is longer than the distance from the site | part of the said inspection lid to which the end of the connection member was connected to the site | part of the lid body to which the other end of the connection member was connected. For this reason, even if the connecting member moves due to an impact, the lid is difficult to move because the connecting member has a sufficient length. Therefore, even if the connecting member moves due to an impact, the second outlet is difficult to open. Temporarily, when the length of the connecting member is arranged at the first switching position, from the part of the inspection lid to which one end of the connecting member is connected to the part of the lid to which the other end of the connecting member is connected. When the distance is the same, the lid opens when the inspection lid is opened, even though it is desired to open only the inspection lid without opening the lid. However, according to the above aspect, when it is desired to open only the inspection lid without opening the lid, only the inspection lid can be opened.

  According to another preferable aspect of the present invention, the connecting member is formed of a string-like member. One end of the connecting member is provided at a central portion of the inspection lid in plan view. Further, the other end of the connecting member is provided at a central portion of the lid body in plan view.

  According to the above aspect, when the operator lifts the inspection lid upward when changing the position of the lid from the first switching position to the second switching position, the lid is lifted upward in a balanced manner in conjunction therewith. Can do.

  According to still another preferred aspect of the present invention, the inspection lid includes a lid body and an inspection gripping part that is detachably provided on the lid body. The connecting member connects the lid and the inspection gripping part.

  According to the said aspect, a 2nd outflow port is open | released because a cover body moves upwards in conjunction with it by lifting an inspection holding part. Therefore, the lid can move and the second outlet can be opened as the operator operates the inspection gripping part. Therefore, the work time by the worker can be reduced, and work efficiency is improved. According to the said aspect, a cover body can move and the 2nd outflow port can be open | released in the state which has closed the inspection opening with the inspection cover.

  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 sewage main is damaged, the drainage drains the wastewater flowing into the inflow conduit from the drainage facility by switching the drainage flow through the main body. It can be discharged to the storage tank through the mass.

  ADVANTAGE OF THE INVENTION According to this invention, when switching the flow path of a waste_water | drain, the drainage can and the drainage system provided with the same which can improve an operator's working efficiency can be provided.

It is a top view of the drainage system concerning a 1st embodiment. It is a front view of the drainage system concerning a 1st 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. 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 a front sectional view of a drain and a check tube. It is a front sectional view of a drain and a check tube. 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. It is front sectional drawing of the drainage basin and inspection cylinder which concern on 2nd Embodiment. It is front sectional drawing of the drainage basin and inspection cylinder which concern on 2nd Embodiment.

  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 Embodiment>
First, the drainage system 1 according to the first embodiment will be described. FIG. 1 is a plan view of a drainage system 1 according to the first 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 rivers 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 </ b> A capable of switching a drainage channel, 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 a drain 20A. The sewage that has flowed out from the drain 20 </ b> A flows into the first outflow pipe 12. The upstream end of the first outflow pipe 12 is connected to the drain 20A. 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). The first outflow pipe 12 corresponds to the “outflow pipe” of the present invention. Here, on the downstream side of the first outflow pipe 12, a public trough 16 is provided. The public basin 16 is provided between the drainage basin 20A and the sewage main 15.

  The sewage that has flowed out of the drainage basin 20A flows into the second outflow conduit 13. The upstream end of the second outflow pipe 13 is connected to the drain 20A. 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 these pipes.

  Next, the drainage basin 20A according to this embodiment will be described. The drainage basin 20A is a drain that can switch the flow path of drainage (sewage in this embodiment). The drainage basin 20 </ b> A is provided in the middle of the drainage pipe 10. Here, the drain 20 </ b> A 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 </ b> A. FIG. 4 is a front view of the drain 20 </ b> A. FIG. 5 is a front sectional view of the drain 20 </ b> A in the VV section of FIG. 3. In the following drawings, the symbols F, Rr, L, and R represent the front, rear, left, and right of the drain 20A, respectively. However, each direction is determined for convenience of explanation, and the present invention is not particularly limited. As shown in FIG. 5, the drain 20 </ b> A includes a main body 21, an inspection lid 18, a lid body 26, and a connecting member 60.

  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. An inspection lid 18 is disposed at the upper end of the inspection cylinder 17. The inspection lid 18 is provided at the upper end of the inspection cylinder 17 so that the inspection port 31 can be freely opened and closed. The drain 20A and the inspection cylinder 17 are buried in the ground so that the upper end of the inspection lid 18 is arranged at substantially the same height as the ground GL (see FIG. 15). Here, the inspection lid 18 can open and close the inspection port 31 via the inspection cylinder 17. Normally, the inspection cylinder 17 is closed by the inspection 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. Sewage flowing in the main body 21 from the inflow port 32 flows out through the first outflow port 33. 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 below 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. Further, in this case, the drain 20 </ b> A 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 drain 20 </ b> A may be disposed inside the storage tank 70. In this case, the inspection port 31 for the drainage 20A may be disposed in the opening portion at the top of the storage tank 70. As a result, the arrangement space for the drainage basin 20A and the storage tank 70 is reduced, so that the wastewater can be arranged in a compact manner.

  As shown in FIG. 7, in the main body 21, an inclined surface 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 surface 22 is steeper as it goes to the second outlet 34. The inclined surface 22 is curved so as to be convex toward the inside of the main body 21. In addition, in the main body 21, a connection portion (upper edge portion of the second outflow cylindrical portion 21d) 23 on the first outlet 33 side among the connection portions between the vertical cylindrical portion 21a and the second outflow cylindrical portion 21d. Is not provided with an inclination like the inclined surface 22. Here, the connection part 23 is a right angle.

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

  As shown in FIG. 6, the drain 20 </ b> A 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 each other on the inner surface of the main body 21 and in front of and behind the second outlet 34 in plan view. The step portion 41 is opposed to each other across the center axis L32 of the inlet 32 (in the present embodiment, the center axis L32 coincides with the center axis L33 of the first outlet 33) in plan view. Two are provided on the side of the main body 21. 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 guide 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 “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 on the inner surface of the vertical cylindrical portion 21a of the main body 21 so as to face each other across the second outlet 34 in a plan view. The support groove 42 is provided in front of and behind the second outlet 34. In plan view, the two support grooves 42 are provided so as to face each other across the central axis L33 of the first outlet 33. Here, the support groove 42 is provided in the step portion 41. The support groove 42 is provided on the second outlet 34 side of the guide 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.

  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 unit 43 is provided on the inner 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 guide surface 40. A part of the confirmation part 43 protrudes from the guide 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 </ b> A. FIG. 10 shows a state in which the lid body 26 is arranged at the second switching position B, and is a front sectional view of the drain 20 </ b> A. 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 provided in the main body 21, and the inlet 32 and the first outlet are arranged so that the sewage flowing from the inlet 32 flows to the first outlet 33. 33 is a position for communicating with 33. As shown in FIG. 10, the second switching position B is provided in the main body 21 and the inlet 32 and the second outlet so that the sewage flowing from the inlet 32 flows to the second outlet 34. 34 is a position where the communication with 34 is established. Here, the lid body 26 is provided so that the second outlet 34 of the main body 21 can be opened and closed. 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.

  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. When the lid body 26 is disposed at the first switching position A, the invert unit 51 connects the inlet 32 and the first outlet 33. 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. The invert part 51 is a groove between the inflow port 32 and the first middle outlet 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 portion 53 is provided at the central portion of the invert portion 51 in the flow path direction L51 (see FIG. 14) of the invert portion 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 connecting member 60 will be described. FIGS. 15 and 16 are front sectional views of the drain 20 </ b> A and the inspection cylinder 17. FIG. 15 shows a state where the lid body 26 closes the second outlet 34, and FIG. 16 shows a state where the second outlet 34 is opened. As shown in FIG. 15, as described above, the inspection cylinder 17 is connected to the inspection port 31 of the drain 20 </ b> A. The inspection lid 18 is disposed at the upper end of the inspection cylinder 17 so that the inspection port 31 can be freely opened and closed. The connecting member 60 is a member that connects the lid body 26 of the drain 20 </ b> A and the inspection lid 18. Here, the connecting member 60 is formed of a bendable string-like member. Here, the connecting member 60 is a string. However, the type of the connecting member 60 is not particularly limited, and may be an iron chain, for example.

  Here, a plate-like mounting portion 61 extending downward is provided at the center of the back surface of the inspection lid 18. A hole 62 penetrating in the horizontal direction is formed in the attachment portion 61. One end of the connecting member 60 is provided at the center of the back surface of the inspection lid 18. Specifically, one end of the connecting member 60 is attached to the attachment portion 61 so as to pass through the hole 62 of the attachment portion 61 of the inspection lid 18. The other end of the connecting member 60 is provided at the central portion of the lid body 26 in plan view. Here, the other end of the connecting member 60 is attached to the grip portion 53 of the lid body 26. The length of the connecting member 60 is the inspection in which one end of the connecting member 60 is attached from the part of the covering body 26 to which the other end of the connecting member 60 is attached when the cover body 26 is disposed at the first switching position A. It is good if it is more than the distance to the part of lid 18. Here, the length of the connecting member 60 is such that the lid body 26 closes the second outlet 34 so that the grip portion 53 is in a position (first switching position A) provided in the main body 21. It is longer than the distance from the upper part to the back surface of the inspection lid 18. Therefore, here, it is preferable that a halfway portion 60a of the connecting member 60 is provided with a tearing knot. Accordingly, it is possible to prevent the connecting member 60 from dripping and a part of the connecting member 60 from being immersed in the sewage flowing in the main body 21.

  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 connects 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 addition, as shown in FIG. 15, when the cover body 26 is arrange | positioned in the 1st switching position A, the middle part 60a of the connection member 60 is good to be melt-knotted.

  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. 17 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 correctly placed on the stepped portion 41. FIG. 18 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. 17, 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. 18, 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. 19 is a view showing a state in which 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 to the first outlet 33 side. 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 is connected to the second outlet 34 of the drain 20 </ b> A through 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 of using the drainage system 1 and the drainage basin 20A according to this 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 wastewater flowing out from the drainage facility 5 is discharged to the storage tank 70 by switching the flow path of the wastewater flowing through the drainage basin 20A. 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 20A 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. The inclined surface 22 is covered with the invert part 51. Therefore, the sewage in the main body 21 does not flow to the second outlet 34 along the inclined surface 22. 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 inspection lid 18 placed on the inspection cylinder 17. At this time, as shown in FIG. 16, the inspection lid 18 is lifted upward. Here, the inspection lid 18 and the lid body 26 are connected by a connecting member 60. For this reason, when the inspection lid 18 is lifted upward, the lid 26 is moved by the connecting member 60 after the tearing knot applied to the middle portion 60a (see FIG. 15) of the connecting member 60 is released. Move upward. As a result, the second outlet 34 is opened. Then, as shown in FIG. 9, the operator holds the grip portion 53 of the lid body 26 through the inspection port 31, and the end portion 51 a of the invert portion 51 of the lid body 26 is positioned above the support groove 42 of the main body 21. Then, the lid body 26 is rotated 90 degrees. 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. 19, the sewage that has flowed into the main body 21 collides with the overflow prevention plate 55 of the lid body 26, whereby the lid body 26 rotates toward the first outlet 33. 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 surface 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 sewage flow path with the drainage basin 20A. 11 can be discharged from the second outflow conduit 13 to the storage tank 70 through the drain 20A.

  In the present embodiment, as shown in FIG. 15, the connecting member 60 connects the inspection lid 18 and the lid body 26. As a result, when the position of the lid 26 is changed from the first switching position A (see FIG. 5) to the second switching position B (see FIG. 10), the inspection lid 18 is lifted as shown in FIG. In conjunction with this, the lid body 26 moves upward. As a result, the second outlet 34 is opened. Therefore, as the operator operates the inspection lid 18, the lid body 26 can move and the second outlet 34 can be opened. Therefore, the work time by the worker can be reduced, and work efficiency is improved. Moreover, in this embodiment, the 2nd outflow port 34 can be open | released by moving the cover body 26 without using a tool.

  As shown in FIG. 7, the second outlet 34 is formed at the bottom of the main body 21. As a result, the lid body 26 moves in the vertical direction, thereby opening or closing the second outlet 34. Therefore, when the position of the lid body 26 is changed from the first switching position A to the second switching position B, the operator lifts the inspection lid 18 upward so that the lid body 26 is easily moved in conjunction with it. Therefore, the second outlet 34 can be easily opened by moving the inspection lid 18 upward.

  As shown in FIG. 6, the second outlet 34 is disposed in the inspection port 31 in plan view. Accordingly, when the operator lifts the inspection lid 18 upward when changing the position of the lid body 26 from the first switching position A to the second switching position B, the lid body 26 moves upward in conjunction therewith. It is possible to make it difficult to hit the inner surface of the main body 21. Therefore, at this time, the second outlet 34 can be easily opened.

  As shown in FIG. 15, the connecting member 60 is formed of a bendable string-like member. One end of the connecting member 60 is connected to the inspection lid 18. The other end of the connecting member 60 is connected to the lid body 26. The length of the connecting member 60 is such that when the lid body 26 is arranged at the first switching position A, the lid body to which the other end of the connecting member 60 is connected from the part of the inspection lid 18 to which one end of the connecting member 60 is connected. It is longer than the distance to 26 sites. As a result, when the lid 26 is disposed at the first switching position A, if an impact is applied to the connecting member 60 from the outside, the connecting member 60 may move in the vertical direction due to the impact. In this embodiment, the length of the connecting member 60 is longer than the distance from the part of the inspection lid 18 to which one end of the connecting member 60 is connected to the part of the lid body 26 to which the other end of the connecting member 60 is connected. Therefore, even if the connecting member 60 moves due to an impact, the length of the connecting member 60 has a margin, and the lid 26 is difficult to move. Therefore, even if the connecting member 60 moves due to an impact, the second outlet 34 is not easily opened.

  If the length of the connecting member 60 is such that the lid body 26 is arranged at the first switching position A, the other end of the connecting member 60 is connected from the part of the inspection lid 18 to which one end of the connecting member 60 is connected. When the distance to the part of the lid body 26 is the same, the lid body 18 is also opened when the inspection lid 18 is opened, although it is desired to open only the inspection lid 18 without opening the lid body 26. However, in this embodiment, when it is desired to open only the inspection lid 18 without opening the lid body 26, only the inspection lid 18 can be opened.

  In the present embodiment, one end of the connecting member 60 is provided at the central portion of the back surface of the inspection lid 18. Further, the other end of the connecting member 60 is provided at a central portion of the lid body 26 in plan view. Accordingly, when the operator lifts the inspection lid 18 upward when changing the position of the lid body 26 from the first switching position A to the second switching position B, the lid body 26 is moved upward in a balanced manner. Can be lifted to.

  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. Next, another embodiment will be briefly described. In the following description, the same reference numerals are given to the same components as those already described, and the description thereof will be omitted.

Second Embodiment
Next, the drainage basin 20B according to the second embodiment will be described. 20 and 21 are front sectional views of the drain 20B and the inspection cylinder 17. FIG. 20 shows a state in which the lid body 26 closes the second outlet 34, and FIG. 21 shows a state in which the second outlet 34 is open.

  As shown in FIG. 20, in the second embodiment, the inspection cylinder 17 is connected to the inspection port 31 of the drain 20B, as in the first embodiment. The other inspection cylinder 17 a is connected to the upper part of the inspection cylinder 17. Here, the upper end of the inspection cylinder 17 is provided so as to protrude into the inspection cylinder 17a. The opening at the upper end of the inspection cylinder 17a is larger than the opening at the upper end of the inspection cylinder 17 and the inspection port 31 of the drain 20B.

  In the present embodiment, the inspection lid 18 includes a first inspection lid 18a and a second inspection lid 18b. The first inspection lid 18a is attached to the upper end of the inspection cylinder 17, and is provided so that the inspection port 31 of the drain 20B drained through the inspection cylinder 17 can be opened and closed. Here, a plate-like attachment portion 63 extending downward is provided on the back surface of the first inspection lid 18a. A hole 64 penetrating in the horizontal direction is formed in the attachment portion 63. On the upper surface of the first inspection lid 18a, a grip portion 65 that can be gripped by an operator is provided at the center portion. The gripping part 65 has a substantially U-shaped shape.

  The second inspection lid 18b is attached to the upper end of the inspection cylinder 17a, and is provided so that the inspection port 31 of the drain 20B can be opened and closed through the inspection cylinders 17 and 17a. Two through-holes 66 are formed in the center portion of the second inspection lid 18b with a predetermined interval. The second inspection lid 18b is provided with a gripping member 67 that is an example of an inspection gripping portion. The grip member 67 is detachably provided on the second inspection lid 18b so as to straddle the two through holes 66. Although illustration is omitted, the gripping member 57 may be attached to the central portion of the second inspection lid 18b in plan view. Although the gripping member 67 has a substantially U-shaped shape, the shape of the gripping member 67 is not particularly limited.

  Here, the connecting member 60 includes a first connecting member 60a and a second connecting member 60b. Although the material of the 1st connection member 60a and the 2nd connection member 60b is not specifically limited, Here, like the connection member 60 of 1st Embodiment, the 1st connection member 60a and the 2nd connection member 60b are formed with a string. Has been. The first connecting member 60a is a member that connects the lid body 26 and the first inspection lid 18a. One end of the first connecting member 60a is attached to the attachment portion 63 so as to pass through the hole 64 of the attachment portion 63 of the first inspection lid 18a. The other end of the first connecting member 60 a is attached to the grip portion 53 of the lid body 26. The length of the first connecting member 60a is such that when the lid body 26 is disposed at the first switching position A, the first connecting member 60a has a length from the part of the lid body 26 to which the other end of the first connecting member 60a is attached. It may be longer than the distance to the part of the first inspection lid 18a to which one end is attached. Here, the length of the 1st connection member 60a is longer than the distance from the upper part of the holding part 53 to the attachment part 63 of the inspection lid | cover 18, when the cover body 26 is arrange | positioned in the 1st switching position A.

  The second connecting member 60b is a member that connects the first inspection lid 18a and the second inspection lid 18b. One end of the second connecting member 60b is attached to the gripping member 67 of the second inspection lid 18b. The other end of the second connecting member 60b is attached to the grip portion 65 of the first inspection lid 18a. Here, the length of the second connecting member 60b is such that the other end of the second connecting member 60b when the first inspection lid 18a is attached to the inspection cylinder 17 and the second inspection lid 18b is attached to the inspection cylinder 17a. The distance from the part of the attached first inspection lid 18a to the part of the second inspection lid 18b to which one end of the second connecting member 60b is attached may be longer. Here, the length of the 2nd connection member 60b is longer than the distance from the holding part 65 of the 1st inspection lid 18a to the holding member 67 of the 2nd inspection lid 18b.

  In the second embodiment, in the disaster mode, when the position of the lid body 26 is changed from the first switching position A to the second switching position B where the inflow port 32 and the second outflow port 34 communicate with each other, for example, In this way, the position of the lid body 26 can be changed. First, as shown in FIG. 21, the operator grasps the grip member 67 of the second inspection lid 18b and lifts the grip member 67 upward. Here, the gripping member 67 of the second inspection lid 18b and the first inspection lid 18a are connected by the second connecting member 60b, and the first inspection lid 18a and the lid body 26 are connected by the first connecting member 60a. ing. Therefore, when the gripping member 67 is lifted upward, the first inspection lid 18a is detached from the inspection cylinder 17 and moves upward in conjunction with the lifting. Further, when the first inspection lid 18a moves upward, the lid body 26 moves upward by the first connecting member 60a in conjunction therewith. As a result, the second outlet 34 is opened. In the present embodiment, the lid body 26 can be removed from the second outlet 34 in a state where the second inspection lid 18b is attached to the inspection cylinder 17a.

  As described above, even in the present embodiment, by lifting the gripping member 67 of the second inspection lid 18b of the inspection lid 18, the lid body 26 moves upward in conjunction with it. As a result, the second outlet 34 is opened. Therefore, as the operator operates the gripping member 67, the lid body 26 can move and the second outlet 34 can be opened. Therefore, the work time by the worker can be reduced, and work efficiency is improved.

  In the present embodiment, the first inspection lid 18a can be omitted. In this case, there may be only one connecting member 60, and one end thereof may be attached to the holding member 67 of the second inspection lid 18b, and the other end may be attached to the holding portion 53 of the lid body 26. Even in this case, the same effect as the present embodiment can be obtained.

<Other embodiments>
In each of the above embodiments, the second outlet 34 is provided at the bottom of the main body 21 so as to open downward. However, the second outlet 34 may be provided on the side of the main body 21 so as to open to the side. At this time, the second outlet 34 may be disposed below the first outlet 33.

  In the first embodiment, one end of the connecting member 60 is attached to the attachment portion 61 provided in the center portion of the back surface of the inspection lid 18. However, the attachment position of one end of the connecting member 60 is not particularly limited. For example, one end of the connecting member 60 may be attached to the end of the back surface of the inspection lid 18.

  In the first embodiment, the other end of the connecting member 60 is provided in the grip portion 53 of the lid body 26. However, the other end of the connecting member 60 may be attached to a portion of the lid body 26 other than the grip portion 53. For example, the other end of the connecting member 60 may be attached to the side portion of the invert portion 51 of the lid body 26.

  In the first embodiment, the other end of the connecting member 60 is provided at the central portion of the lid body 26 in plan view. However, the other end of the connecting member 60 may be provided at the end of the lid body 26 in plan view.

  In the first embodiment, the inspection lid 18 and the lid body 26 are coupled by the single coupling member 60. However, the number of connecting members 60 is not particularly limited. The inspection lid 18 and the lid body 26 may be coupled by a plurality of coupling members 60. As a result, the inspection lid 18 and the lid body 26 can be stably connected.

DESCRIPTION OF SYMBOLS 1 Drainage system 11 Inflow pipeline 12 1st outflow pipeline 13 2nd outflow pipeline 17 Inspection cylinder 18 Inspection lid 20A, 20B Drainage 21 Main body 26 Lid 31 Inspection port 32 Inlet 33 First outlet 34 Second Outflow port 51 Inverted portion 53 Gripping portion 60 Connecting member 61 Mounting portion 70 Storage tank

Claims (8)

An inspection port opened upward, an inflow port formed on a side portion into which drainage flows in, a first outflow port formed in the side portion through which drainage flows out, and a side portion or a bottom portion, the first outflow port A substantially cylindrical rectangular main body formed at a lower position and having a second outlet from which drainage flows out;
An inspection lid that is freely openable and closable at the inspection opening;
The second outlet is provided in the main body so that the second outlet can be opened and closed, and the second outlet is closed so that drainage flows from the inlet to the first outlet. A first switching position that communicates with the first outlet, and the second outlet is opened so that the drainage flows from the inlet to the second outlet, and the inlet and the second outlet are A lid capable of changing the position between the second switching position to be communicated;
A connecting member for connecting the inspection lid and the lid;
With drainage.   The drain according to claim 1, wherein the second outlet is formed at a bottom of the main body.   The drain according to claim 2, wherein the second outlet is disposed in the inspection port in a plan view. The connecting member is formed by a bendable string-shaped member,
One end of the connecting member is provided on the inspection lid,
The other end of the connecting member is provided on the lid,
The length of the connecting member is such that when the lid is arranged at the first switching position, the lid body to which the other end of the connecting member is connected from a part of the inspection lid to which one end of the connecting member is connected. The drain according to any one of claims 1 to 3, which is longer than the distance to the part. The connecting member is formed by a string-like member,
One end of the connecting member is drained according to any one of claims 1 to 4, which is provided in a central portion of the inspection lid in a plan view.   The other end of the connecting member is drained according to claim 5, which is provided in a central portion of the lid in a plan view. The inspection lid is
A lid body;
An inspection gripping part detachably provided on the lid body;
With
The said connection member drains as described in any one of Claim 1-6 which connects the said cover body and the said inspection holding part. When draining as described in any one of claims 1 to 7,
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 and storing drainage;
With drainage system.

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