JP2016003468A - Catch basin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a catch basin which is easy to be disposed in a small space, while preventing drain water flowing from a second inlet from flowing back to a first inlet.SOLUTION: In plan view, a straight line passing through an end face of a first inlet 51 is orthogonal to a straight line passing through an end face of a second inlet 52. In plan view, an intersection between a central axis L12 of the first inlet 51 and a straight line L31 extended orthogonal to the central axis L12 from a central axis L11 of an inspection hole 41 is defined as an intersection P41. In plan view, when a straight line L32 is a straight line extended from the intersection P41 toward the second inlet 52 so as to form an angle R2 of 45 degrees with the central axis L12 of the first inlet 51 based on the intersection P41, the intersection P42 where the straight line L32 and a central axis L13 of the second inlet 52 intersect is located outside the inspection hole 41, on a second drain passage 36. A partition plate 71 extended upward is arranged between a first drain passage 35 and the second drain passage 36.

Description

  The present invention relates to a drain.

  Conventionally, drainage basins have been used in drainage systems that drain wastewater discharged from toilets and other drainage facilities to the sewage main. For example, the drainage system includes a main pipeline connected to the sewage main pipe, a branch pipeline connected to the drainage facility, and a drain for connecting the main pipeline and the branch pipeline.

  For example, the above drainage is disclosed in Patent Document 1. The drainage basin disclosed in Patent Document 1 includes a bottomed cylindrical main body opened upward. The main pipe inflow cylindrical part and the main pipe outflow cylindrical part are provided on the side part of the main body so as to face each other. Further, a branch pipe inflow cylindrical portion is provided on the side portion of the main body so that a straight line passing through the end surface is orthogonal to a straight line passing through the end surface of the main pipe inflow cylindrical portion in a plan view. A main groove connected to the main pipe inflow cylindrical part and the main pipe outflow cylindrical part and a sub-groove connected to the main groove and the branch pipe inflow cylindrical part are provided at the bottom of the main body. The sub-groove is connected to the main groove at an acute angle. In the drainage basin described in Patent Document 1, wastewater that has flowed into the main body from the branch pipe inflow cylindrical part flows into the main pipe outflow cylindrical part via the sub-groove and the main groove, and from the main pipe outflow cylindrical part. It flows out of the drain.

Japanese Utility Model Publication No. 4-26548

  By the way, drains are buried in the ground. For example, the drainage basin is buried in a narrow area where other members such as piping are buried around. The drainage basin described in Patent Document 1 may be difficult to install in such a narrow area. Therefore, in the drainage basin described in Patent Document 1, it is conceivable to shift the position of the end face of the branch pipe inflow cylindrical portion. For example, in plan view, it is conceivable to modify the position of the end face of the branch pipe inflow tubular portion of the drainage basin described in Patent Document 1 so as to be shifted to the inspection port side. This makes it easier to install in a narrow area than the drainage basin described in Patent Document 1. However, when the end face of the branch pipe inflow cylindrical part is shifted to the inspection port side, when drainage flows in from the branch pipe inflow cylindrical part, the ridge provided between the main groove and the sub groove is overcome. As a result, drainage sometimes flowed upstream of the main groove. In some cases, part of the drainage that has flowed to the upstream side of the main groove flows backward to the main pipe inflow cylindrical portion.

  Further, in plan view, it is conceivable to modify the position of the end face of the branch pipe inflow cylindrical portion described in Patent Document 1 so as to be shifted in the direction toward the main pipe inflow cylindrical portion. In this case, it becomes easier to place the drainage water while avoiding the buried piping. However, in this case, the angle formed between the sub-groove and the main groove is further acute, and as a result, the width of the sub-groove is narrowed. Therefore, when drainage flows in from the branch pipe inflow cylindrical portion, the drainage may overflow in the secondary groove. And the waste water overflowing in the sub-groove may get over the raised portion and flow to the upstream side of the main groove, and a part of the waste water may flow backward to the main pipe inflow cylindrical portion and flow out.

  This invention is made | formed in view of this point, The objective is the waste_water | drain provided with the 1st inflow port and the 2nd inflow port into which waste_water | drain flows in, Comprising: It is to provide a drainage basin capable of preventing drainage flowing in from the inlet from flowing backward from the first inlet.

  The drainage basin according to the present invention comprises a substantially cylindrical basin body, a first inflow cylindrical part, a second inflow cylindrical part, an outlet, a first drainage channel, and a second drainage channel. I have. The main body has an inspection port opened upward. The first inflow tubular portion has a first inflow port through which drainage flows, and is provided on a side portion of the main body. The second inflow tubular portion has a second inflow port through which drainage flows, and at least a part thereof is provided on a side portion of the main body. The outlet is provided on the side of the main body, and drainage flows out. The first drainage flow channel is connected to the first inflow tubular portion and the outlet in the main body. The second drainage channel is connected to the first drainage channel and the second inflow port in the main body and the second inflow cylindrical portion. In a plan view, an angle formed between the first drainage channel and the second drainage channel is more acute than the portion of the first drainage channel where the second drainage channel is connected. It is. In a plan view, a straight line passing through the end face of the first inlet is orthogonal to a straight line passing through the end face of the second inlet. In a plan view, an intersection between the central axis of the first inlet and a first straight line extending from the central point of the inspection port so as to be orthogonal to the central axis of the first inlet is a first intersection. A straight line extending from the first intersection point to the second inlet side so as to form an angle of 45 degrees with the central axis of the first inlet port with the first intersection point as the center is a second line. When a straight line is formed, a second intersection point where the second straight line and the central axis of the second inflow port intersect is located outside the inspection port and on the second drainage channel. A partition plate extending upward is provided between the first drainage channel and the second drainage channel.

  According to the drainage basin, in plan view, the second intersection where the second straight line and the central axis of the second inlet intersect is outside the inspection port and located on the second drainage channel. Yes. By disposing the second inflow port in such a positional relationship, the distance to the axial direction of the second inflow port in the drainage can be made shorter than the drainage in Patent Document 1. Therefore, it becomes easy to arrange in a narrow area. Further, by arranging the second inflow port in such a positional relationship, the width of the second drainage channel can be secured to some extent. Therefore, the wastewater flowing in from the second inflow port is less likely to overflow in the second drainage flow path, and the wastewater can flow smoothly to the outflow port. Moreover, according to the said drainage, the partition plate is provided between the 1st drainage flow path and the 2nd drainage flow path. Therefore, the drainage that has flowed in vigorously from the second inflow cylindrical portion can be prevented from flowing to the upstream side of the first drainage flow path beyond the side surface of the second drainage flow path by the partition plate, and the drainage can be prevented. It is easy to be led to the downstream side of the first drainage flow path by the partition plate. Therefore, it is possible to prevent the waste water flowing in from the second inflow cylindrical portion from flowing backward from the first inflow cylindrical portion.

  According to a preferred aspect of the present invention, the second inflow cylindrical portion is curved so as to be convex toward the first inflow cylindrical portion in plan view.

  According to the said aspect, the waste_water | drain which flowed into the 2nd inflow cylindrical part from the 2nd inflow port flows easily to an outflow port along the curved part of a 2nd inflow cylindrical part. Therefore, the waste water that has flowed into the second inflow cylindrical portion can be made difficult to flow backward from the first inflow cylindrical portion.

  According to another preferable aspect of the present invention, the second inflow cylindrical portion has a connecting margin to which a pipe is connected. In plan view, at least a part of the connecting margin overlaps the inspection port.

  According to the said aspect, the distance with respect to the axial direction of the 2nd inflow cylindrical part in a drainage can be made shorter than the drainage tank described in patent document 1. FIG. Therefore, it can be made more compact than the drainage basin of Patent Document 1, and can be easily installed in a narrow area.

  According to another preferred aspect of the present invention, the main body and the second inflow cylindrical portion are integrally formed.

  According to the above aspect, drainage does not leak from between the second inflow cylindrical portion and the main body. The waste water that has flowed into the second inflow cylindrical portion can be smoothly flowed into the main body.

  According to another preferable aspect of the present invention, in a plan view, the central axis of the second inflow port is located closer to the first inflow cylindrical portion than the center point of the inspection port.

  According to the said aspect, the waste_water | drain which flowed in from the 2nd inflow port becomes easy to collide with a partition plate in the outward of an inspection port in planar view. Therefore, the wastewater that collides with the partition plate is less likely to be scattered and easily flows to the downstream side of the second drainage flow path.

  According to a preferred aspect of the present invention, the partition plate is continuous from the second inflow cylindrical portion, and is curved so as to be convex toward the first inflow cylindrical portion in plan view; A straight plate provided at the downstream end of the curved plate and extending downstream of the second drainage channel.

  According to the said aspect, the waste_water | drain which flowed in vigorously from the 2nd inflow cylindrical part is easy to flow to the downstream of a 2nd drainage flow path with a curved plate, after colliding with a curved plate. Therefore, the wastewater that has flowed in from the second inflow cylindrical portion easily flows to the downstream side of the first drainage flow path along the curved plate. Further, since the waste water that has flowed into the main body from the first inflow cylindrical portion flows along the curved plate, it easily flows to the downstream side of the first drain flow channel.

  According to another preferred aspect of the present invention, the upper portion of the straight plate is inclined downward toward the downstream side.

  In order to perform maintenance on whether there is damage or clogging in the main body, a maintenance tool for maintenance is inserted into the main body from the inspection port. According to the said aspect, the upper part of a straight board inclines below as it goes downstream. Therefore, when the maintenance tool is inserted into the main body through the inspection port, the maintenance tool is guided into the main body so as to slide on the slope of the upper part of the straight plate. Therefore, the maintenance tool can be smoothly inserted into the main body.

  According to another preferable aspect of the present invention, the curved plate is outside the inspection port in a plan view, and is between the first inflow cylindrical portion and the second inflow cylindrical portion. Is provided.

  When drainage flows into the main body from the second inflow cylindrical portion, the drainage collides with the curved plate of the partition plate. Since the drainage that hits the curved plate tends to be scattered in all directions, there is a possibility that the wastewater will be scattered in the main body. However, according to the above aspect, the curved plate is provided outside the inspection port and between the first inflow cylindrical portion and the second inflow cylindrical portion in plan view. Therefore, since the waste water that collided with the curved plate scatters into the second inflow cylindrical portion, it is possible to make it more difficult to scatter at any location in the main body.

  According to another preferable aspect of the present invention, the second inflow cylindrical portion is provided from the side of the main body to the side of the first inflow cylindrical portion.

  According to the said aspect, the distance of a 2nd drainage flow path is securable. Therefore, even when the amount of waste water flowing in from the second inflow tubular portion is large, the waste water can be hardly clogged in the second drain passage.

  According to another preferable aspect of the present invention, an inclined portion that is inclined downward toward the downstream side is provided on a bottom surface of an intermediate portion of the first drainage channel.

  According to the said aspect, the waste_water | drain which flowed in into the downstream of a 1st drainage channel becomes difficult to flow backward to the upstream of a 1st drainage channel by an inclination part. Therefore, it is possible to prevent the wastewater that has flowed into the downstream side of the first drainage flow channel from flowing backward from the first inflow cylindrical portion.

  According to another preferable aspect of the present invention, when viewed from the axial direction of the first inflow tubular portion, at least a part of the partition plate is disposed at a position visually recognized through the first inflow port. Yes.

  According to the said aspect, the width | variety of a 2nd drainage flow path can be made wide. Therefore, the amount of drainage flowing in the second drainage channel can be increased. Therefore, it is possible to make it difficult for the wastewater in the second drainage flow path to flow backward from the second inflow cylindrical portion.

  According to another preferable aspect of the present invention, an outflow cylindrical portion provided on a side portion of the main body is provided. The outlet is provided at a downstream end of the outflow cylindrical portion.

  According to the said aspect, the distance is ensured by the outflow cylindrical part between the outflow port and the downstream end of the 1st drainage flow path. Therefore, it is possible to make it difficult for external drainage to flow into the first drainage channel in the main body from the outlet.

  According to another preferable aspect of the present invention, an elbow pipe is rotatably connected to the connection margin of the second inflow cylindrical portion.

  According to the above aspect, even if the pipe connected to the second inflow cylindrical portion extends in any direction, the pipe and the second inflow cylindrical portion are connected via the elbow pipe. easy.

  According to the present invention, the drain is a drain having a first inlet and a second inlet for allowing drainage to flow in, and is easily disposed in a narrow area. It is possible to provide a drainage basin capable of preventing backflow and outflow.

It is a top view of the drainage system concerning an embodiment. It is a top view of the drainage basin concerning an embodiment. It is a front view of a drainage basin. FIG. 4 is a cross-sectional view of a drainage basin in the IV-IV cross section of FIG. 2. FIG. 5 is a cross-sectional view of the drainage basin in the VV cross section of FIG. 2. It is a left view of a drainage basin. It is a right view of a drainage basin. FIG. 5 is a cross-sectional view of a drainage canal in the VIII-VIII cross section of FIG. 3. It is the top view which decomposed | disassembled each member which comprises a drainage basin. It is a top view of the drainage basin concerning other embodiments. It is a right view of the drainage basin concerning other embodiments.

  Hereinafter, an embodiment of a drainage basin 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.

  Drawing 1 is a top view of drainage system 1 provided with drainage trough 30A concerning an embodiment. The drainage system 1 is a system through which drainage flows as shown in FIG. 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. Here, the drainage facility 5 is any one of a toilet, a bath, a kitchen sink, and the like, and is particularly preferably a toilet. In addition, in FIG. 1, although the two drainage facilities 5 are illustrated, the number of the drainage facilities 5 is not specifically limited. There may be one drainage facility 5 or three or more. “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 for flowing sewage discharged from the drainage facility 5 out of drainage to a sewage main pipe 6 connected to a sewage treatment plant (not shown). However, the drainage system 1 may be a system through which rainwater flows. In this case, the drainage facility 5 is replaced with a gutter or the like where rainwater is collected, and the sewage main 6 is converted into a rainwater main or a river. Although illustration is omitted, the drainage system 1 is embedded in the ground. The drainage system 1 includes a main pipeline 10, a branch pipeline 20, and a drainage tank 30A.

  The main pipeline 10 is a pipeline in which the drainage discharged from the drainage facility 5 is collected. In FIG. 1, for the sake of convenience, the right is the upstream of the main pipeline 10 and the left is the downstream of the main pipeline 10. Although not shown in particular, the main pipeline 10 is inclined downward as it goes downstream. The main pipeline 10 includes a first main pipeline 11, a second main pipeline 12, and a third main pipeline 13. For example, a drainage facility (not shown) different from the drainage facility 5 is connected to the upstream end of the first main pipeline 11. An upstream drainage trough 30A (in FIG. 1, right drainage trough 30A) is connected to the downstream end of the first main pipeline 11. An upstream drainage basin 30A is connected to the upstream end of the second main pipeline 12, and a downstream drainage basin 30A (left drainage basin 30A in FIG. 1) is connected to the downstream end. A downstream drainage tank 30A is connected to the upstream end of the third main pipeline 13, and a sewage main pipe 6 is connected to the downstream end. A public square (not shown) may be provided on the downstream side of the main pipeline 10.

  The branch pipe 20 is a pipe through which the drainage discharged from the drainage facility 5 flows to the main pipeline 10 through the drainage tank 30A. The branch pipe line 20 is connected to the drainage facility 5 and the drainage trough 30A. Here, the branch pipeline 20 includes a first branch pipeline 21 and a second branch pipeline 22. In FIG. 1, for the sake of convenience, the lower side is the upstream side of the branch pipeline 20 and the upper side is the downstream side of the branch pipeline 20. An upstream drainage facility 5 is connected to the upstream end of the first branch pipe 21, and an upstream drainage tank 30A is connected to the downstream end. A downstream drainage facility 5 is connected to the upstream end of the second branch pipe 22, and a downstream drainage tank 30A is connected to the downstream end. “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 trough 30A according to this embodiment will be described. In FIG. 1, two drainage basins 30A are illustrated, but the two drainage basins 30A have the same configuration. However, the two drainage basins 30A may have different configurations. For example, any one of the two drainage basins 30A may be a conventionally known drainage basin. The drainage basin 30A joins the drainage discharged from the drainage facility 5 and the drainage flowing from the upstream side of the main pipeline 10, and flows the drainage downstream of the main pipeline 10, which is a so-called merge. The drainage basin 30 </ b> A is provided in the middle of the main pipeline 10.

  FIG. 2 is a plan view of a drainage trough 30A according to this embodiment. FIG. 3 is a front view of the drainage trough 30A. FIG. 4 is a cross-sectional view of the drainage trough 30A in the IV-IV cross section of FIG. FIG. 5 is a cross-sectional view of the drainage trough 30A in the VV cross section of FIG. FIG. 6 is a left side view of the drainage trough 30A. FIG. 7 is a right side view of the drainage trough 30A. 8 is a cross-sectional view of the drainage basin in the VIII-VIII cross section of FIG. 2 to 8 and the like, the symbols F, Rr, L, and R represent the front, rear, left, and right of the drain 30A, respectively. However, each direction is determined for convenience of explanation, and the present invention is not particularly limited. As shown in FIG. 2, the drainage trough 30 </ b> A includes a main body 31, a first inflow cylindrical portion 32, a second inflow cylindrical portion 33, an outflow cylindrical portion 34, a first drainage flow path 35, A second drainage channel 36 and a partition plate 71 are provided.

  As shown in FIG. 3, the main body 31 has a substantially cylindrical shape extending in the vertical direction. The main body 31 has a space inside as shown in FIG. An inspection port 41 is formed at the upper part of the main body 31. The inspection port 41 opens upward. The inspection port 41 is a part where the operator performs maintenance to determine whether there is damage or clogging in the main body 31, the first inflow cylindrical portion 32, the second inflow cylindrical portion 33, and the outflow cylindrical portion 34. It is. Although not particularly shown, a vertical pipe is connected to the inspection port 41, and a lid is placed on the upper end of the vertical pipe. Here, the inspection port 41 refers to the inside of the upper peripheral surface of the main body 31 in plan view.

  The first inflow cylindrical part 32 is provided on the side part of the main body 31 more and more. Here, as shown in FIG. 2, the central axis L12 of the first inflow cylindrical portion 32 is opposite to the second inflow cylindrical portion 33 with respect to the central axis L11 of the inspection port 41 in a plan view, that is, Located behind. As shown in FIG. 4, the central axis L12 of the first inflow tubular portion 32 and the central axis L11 of the inspection port 41 are orthogonal to each other when viewed from the front. A connecting margin 61 is provided in the upstream portion of the first inflow cylindrical portion 32. A pipe constituting the upstream side of the main pipeline 10 is connected to the connection margin 61. For example, as shown in FIG. 1, a pipe constituting the downstream end of the first main pipeline 11 is connected to the connecting margin 61 of the first inflow cylindrical portion 32 of the upstream drainage basin 30A, and the downstream drainage A pipe constituting the downstream end of the second main pipeline 12 is connected to the connecting margin 61 of the first inflow cylindrical portion 32 of 30A. In the present embodiment, the connecting margin 61 of the first inflow cylindrical portion 32 is a receiving port into which a pipe is inserted, as shown in FIG.

  The first inflow cylindrical portion 32 has a first inflow port 51. The first inflow port 51 is provided at the upstream end of the first inflow cylindrical portion 32, that is, the upstream end of the connecting margin 61. Drainage flows into the first inlet 51. Here, the 1st inflow port 51 is opened to the side. In a front view, the straight line passing through the end face of the first inflow port 51 and the straight line passing through the end face of the inspection port 41 are orthogonal to each other. Here, the central axis L12 of the first inflow cylindrical portion 32 is also the central axis of the first inflow port 51. Therefore, the central axis L12 is also referred to as the central axis of the first inflow port 51 as appropriate.

  As shown in FIG. 2, at least a part of the second inflow cylindrical portion 33 is provided on the side portion of the main body 31. In the present embodiment, the second inflow cylindrical portion 33 is provided from the side portion of the main body 31 to the side portion of the first inflow cylindrical portion 32. The central axis L13 of the second inflow cylindrical portion 33 is located on the first inflow cylindrical portion 32 side, that is, on the right side of the central axis L11 of the inspection port 41 in plan view. The side end portion of the second inflow cylindrical portion 33 on the outflow cylindrical portion 34 side is located closer to the first inflow cylindrical portion 32 than the central axis L11 of the inspection port 41. However, the second inflow cylindrical portion 33 may not be provided on the side portion of the first inflow cylindrical portion 32 but may be provided only on the side portion of the main body 31. In the present embodiment, the central axis L13 of the second inflow cylindrical portion 33 refers to the end surface of the second inflow cylindrical portion 33, that is, the central axis of the second inflow port 52 described later. Therefore, the central axis L13 is also referred to as a central axis of the second inflow port 52 as appropriate. The second inflow cylindrical portion 33 is curved so as to protrude toward the first inflow cylindrical portion 32. The second inflow cylindrical portion 33 is slightly curved so as to face the outlet 53 side toward the downstream side. Here, a part of the second inflow cylindrical portion 33 on the downstream side and the first inflow cylindrical portion 32 side (that is, the right side) is slightly oriented toward the outlet 53 side toward the downstream side. It is curved. As shown in FIG. 3, the bottom of the second inflow cylindrical portion 33 is disposed at the same height as the bottom of the first inflow cylindrical portion 32. Here, the bottom portion of the second inflow tubular portion 33 is disposed at a position higher than the bottom portion of the outflow tubular portion 34, but is disposed at the same height as the bottom portion of the outflow tubular portion 34. Also good. As shown in FIG. 2, the central axis L13 of the second inflow cylindrical portion 33 is orthogonal to the central axis L12 of the first inflow cylindrical portion 32. As shown in FIG. 7, the central axis L <b> 13 of the second inflow cylindrical portion 33 is orthogonal to the central axis L <b> 11 of the inspection port 41.

  As shown in FIG. 2, a connecting margin 62 is provided in the upstream portion of the second inflow cylindrical portion 33. A pipe constituting the branch pipe 20 is connected to the connecting margin 62 of the second inflow cylindrical portion 33. For example, as shown in FIG. 1, a pipe constituting the downstream end of the first branch pipe 21 is connected to the connecting margin 62 of the second inflow cylindrical portion 33 of the upstream drainage basin 30 </ b> A. A pipe constituting the downstream end of the second branch pipeline 22 is connected to the connecting margin 62 of the second inflow cylindrical portion 33 of the downstream drainage basin 30A. The connecting margin 62 of the second inflow cylindrical portion 33 is a receiving port, but may be a connecting port. As shown in FIG. 2, a part of the connecting margin 62 of the second inflow cylindrical portion 33 overlaps the inspection port 41 in plan view. Here, in plan view, the portion of the connecting margin 62 on the outflow cylindrical portion 34 side, that is, the downstream side of the left portion overlaps the inspection port 41. However, in plan view, the entire left portion of the connecting margin 62 may overlap the inspection port 41, or the central portion of the connecting margin 62 or the downstream side of the right portion may overlap the inspection port 41.

  As shown in FIG. 3, the second inflow cylindrical portion 33 has a second inflow port 52. As shown in FIG. 2, the second inflow port 52 is provided at the upstream end of the second inflow cylindrical portion 33, that is, at the upstream end of the connecting margin 62. Drainage flows into the second inlet 52. Here, the 2nd outflow port 52 is opened toward the front. As shown in FIG. 7, the straight line passing through the end surface of the second inflow port 52 and the straight line passing through the end surface of the inspection port 41 are orthogonal to each other in a side view. As shown in FIG. 2, the straight line passing through the end surface of the second inflow port 52 and the straight line passing through the end surface of the first inflow port 51 are orthogonal to each other in plan view. In plan view, the central axis L13 of the second inflow port 52 is located outside the inspection port 41 and closer to the first inflow cylindrical portion 32 than the inspection port 41.

  In a plan view, a straight line extending from the central axis (center point) L11 of the inspection port 41 so as to be orthogonal to the central axis L12 of the first inlet 51 is defined as a straight line L31, and the central axis L12 and the straight line L31 of the first inlet 51 are illustrated. Let the intersection point with be an intersection point P41. A straight line extending from the intersection point P41 toward the second inlet 52 is defined as a straight line L32. With respect to the intersection point P41, an angle R2 formed by the central axis L12 of the first inflow port 51 closer to the first inflow cylindrical portion 32 than the intersection point P41 and the straight line L32 is 45 degrees. At this time, when an intersection point between the straight line L32 and the central axis L13 of the second inlet 52 is defined as an intersection point P42, the intersection point P42 is outside the inspection port 41 in a plan view, and the second drainage flow path. 36. Here, the intersection P42 is located on a portion of the second inflow cylindrical portion 33 excluding the connecting margin 62 in plan view. In the present embodiment, the straight line L31 and the straight line L32 correspond to the “first straight line” and the “second straight line” of the present invention, respectively. Further, the intersection point P41 and the intersection point P42 correspond to the “first intersection point” and the “second intersection point” of the present invention, respectively.

  The outflow cylindrical portion 34 is provided on the side of the main body 31 and on the opposite side of the first inflow cylindrical portion 32. The outflow cylindrical portion 34 and the first inflow cylindrical portion 32 face each other. However, the outflow cylindrical portion 34 may not be provided on the opposite side of the first inflow cylindrical portion 32. The central axis L14 of the outflow cylindrical portion 34 is located on the opposite side of the second inflow cylindrical portion 33 with respect to the central axis L11 of the inspection port 41. Here, the distance in the length direction of the outflow cylindrical portion 34 is shorter than the distance in the length direction of the first inflow cylindrical portion 32. As shown in FIG. 3, the bottom portion of the outflow tubular portion 34 is disposed at a position lower than the bottom portion of the first inflow tubular portion 32 and the bottom portion of the second inflow tubular portion 33. However, the bottom part of the outflow cylindrical part 34 may be arranged at the same height as the bottom part of the first inflow cylindrical part 32 or the bottom part of the second inflow cylindrical part 33. As shown in FIG. 2, the central axis L <b> 14 of the outflow cylindrical portion 34 is parallel to the central axis L <b> 12 of the first inflow cylindrical portion 32. Further, the central axis L14 of the outflow cylindrical portion 34 and the central axis L13 of the second inflow cylindrical portion 33 are orthogonal to each other in plan view. As shown in FIG. 4, the center axis L <b> 14 of the outflow cylindrical portion 34 is orthogonal to the center axis L <b> 11 of the inspection port 41 in the front view.

  A connecting margin 63 is provided in the downstream portion of the outflow cylindrical portion 34. A pipe constituting the main pipeline 10 is connected to the connecting margin 63 of the outflow cylindrical portion 34. For example, as shown in FIG. 1, a pipe constituting the upstream end of the second main pipeline 12 is connected to the connecting margin 63 of the outflow cylindrical portion 34 of the upstream drainage basin 30 </ b> A. A pipe constituting the upstream end of the third main pipeline 13 is connected to the connecting margin 63 of the outflow cylindrical portion 34 of the downstream drainage basin 30A. As shown in FIG. 4, the connecting margin 63 of the outflow cylindrical portion 34 is a receiving port, but may be a differential port.

  As shown in FIG. 6, the outflow cylindrical portion 34 has an outlet 53. As shown in FIG. 4, the outlet 53 is provided at the downstream end of the outflow cylindrical portion 34, that is, at the downstream end of the connecting margin 63. The outflow port 53 is provided on the side portion of the main body 31 via the outflow cylindrical portion 34. Here, the outlet 53 is provided on the side of the main body 31 and on the opposite side of the first inlet 51, but may not be provided on the opposite side of the first inlet 51. The wastewater that has flowed into the main body 31 flows out from the outlet 53 to the outside. Here, the outflow port 53 is open to the side. As shown in FIG. 2, the end surface of the outlet 53 is parallel to the end surface of the first inlet 51 in plan view. The outlet 53 is opposed to the first inlet 51. In a plan view, the straight line passing through the end face of the outlet 53 is orthogonal to the straight line passing through the end face of the second inlet 52. As shown in FIG. 3, the straight line passing through the end surface of the outlet 53 is orthogonal to the straight line passing through the end surface of the inspection port 41 in the front view. In the present embodiment, the outflow port 53 is provided in the outflow cylindrical portion 34, but may be formed directly on the side portion of the main body 31.

  Next, the relationship among the sizes of the inspection port 41, the first inlet 51, the second inlet 52, and the outlet 53 will be described. As shown in FIG. 2, the inspection port 41 is opened larger than the first inflow port 51, the second inflow port 52, and the outflow port 53. In other words, the inner diameter of the inspection port 41 is longer than the inner diameter of the first inlet 51, the inner diameter of the second inlet 52, and the inner diameter of the outlet 53. Therefore, the operator can easily perform maintenance inside the main body 31, the first inflow cylindrical portion 32, the second inflow cylindrical portion 33, and the outflow cylindrical portion 34 through the inspection port 41. Here, although the 1st inflow port 51, the 2nd inflow port 52, and the outflow port 53 are the same magnitude | sizes, respectively, a magnitude | size may differ.

  In the present embodiment, the main body 31, the first inflow cylindrical portion 32, the second inflow cylindrical portion 33, and the outflow cylindrical portion 34 are integrally formed. However, the main body 31, the first inflowing cylindrical part 32, the second inflowing cylindrical part 33, and the outflowing cylindrical part 34 may be molded separately and assembled together after molding. Further, any two or three of the main body 31, the first inflow cylindrical portion 32, the second inflow cylindrical portion 33, and the outflow cylindrical portion 34 may be integrally formed.

  The first drainage channel 35 is provided in the main body 31 more and more. The first drainage channel 35 is connected to the first inflow cylindrical portion 32 and the outflow cylindrical portion 34. The first drainage channel 35 is continuous with the first inflow cylindrical portion 32 and the outflow cylindrical portion 34. Here, the 1st drainage flow path 35 is a straight groove | channel in planar view. However, the first drainage channel 35 may be a groove that is at least partially curved in a plan view. As shown in FIG. 4, an inclined portion 35 a is provided at the bottom of the first drainage channel 35. The inclined portion 35 a is provided at the bottom of the middle portion of the first drainage channel 35. The inclined portion 35a is downstream from the bottom portion 35b upstream of the location where the inclined portion 35a is provided in the first drainage channel 35 (hereinafter also referred to as the upstream bottom portion 35b of the first drainage channel 35). Inclined downward toward

  As shown in FIG. 2, the second drainage flow path 36 is provided in the main body 31 and the second inflow cylindrical portion 33. The second drainage channel 36 is connected to the second inflow port 52 and a middle part of the first drainage channel 35. The second drainage channel 36 is continuous with the second inlet 52 and the first drainage channel 35. Here, the second drainage channel 36 is provided in front of the upstream side of the first drainage channel 35 so as to be adjacent to the upstream side of the first drainage channel 35. The second drainage channel 36 is closer to the first drainage channel 35 as it goes downstream. Here, the second drainage channel 36 is connected to the downstream side of the first drainage channel 35. In plan view, the angle R formed by the second drainage channel 36 and the upstream side of the first drainage channel 35 is an acute angle. This angle R is, for example, 45 degrees. However, the angle R may be a right angle or 90 degrees. Here, the angle R is an extension line L21 of a line connecting the centers in the width direction of the second drainage channel 36 and an extension line L22 of a line connecting the centers of the first drainage channels 35 in the width direction in a plan view. Is the angle between The width of the second drainage flow path 36 is shortened from the upstream side toward the downstream side. As shown in FIG. 3, the bottom of the second drainage channel 36 is inclined downward from the upstream side toward the downstream side. Specifically, the bottom of the second drainage channel 36 is gently inclined from the upstream side toward the downstream side. As a result, the wastewater that has flowed into the main body 31 from the second inflow cylindrical portion 33 can be naturally flowed from the upstream side to the downstream side of the second drainage flow path 36. Therefore, it is possible to make it difficult for the wastewater that has flowed into the main body 31 from the second inflow cylindrical portion 33 to flow back to the first inflow cylindrical portion 32. Here, the bottom part on the downstream side of the second drainage flow path 36 has the same height as the bottom part on the downstream side of the first drainage flow path 35.

  As shown in FIG. 8, the partition plate 71 includes a downstream portion of the first inflow cylindrical portion 32 and a downstream portion of the second inflow cylindrical portion 33, and the first drainage channel 35 and the second drainage channel 36. It is a partitioning plate. The partition plate 71 extends from between the downstream portion of the first inflow cylindrical portion 32 and the downstream portion of the second inflow cylindrical portion 33 to between the first drainage flow channel 35 and the second drainage flow channel 36. Is provided. As shown in FIG. 7, when viewed from the axial direction of the first inflow cylindrical portion 32 (here, in the right side view), a part of the partition plate 71 is at a position visually recognized through the first inflow port 51. Has been placed. Here, as shown in FIG. 6, when viewed from the axial direction of the outflow cylindrical portion 34 (here, in the left side view), a part of the partition plate 71 is disposed at a position where it can be seen through the outflow port 53. Has been. As shown in FIG. 5, the partition plate 71 extends upward. Here, the partition plate 71 includes a curved plate 72 and a straight plate 73. As shown in FIG. 2, the curved plate 72 is disposed outside the inspection port 41 in plan view. Here, the curved plate 72 is between the first inflow cylindrical portion 32 and the second inflow cylindrical portion 33 and is connected to the first inflow cylindrical portion 32 and the second inflow cylindrical portion 33. From the position, it extends toward the outflow cylindrical portion 34 side. The curved plate 72 is provided at a hidden position by the first inflow cylindrical portion 32 and the second inflow cylindrical portion 33 in plan view. As shown in FIG. 8, the curved plate 72 is curved so as to be convex toward the first inflow cylindrical portion 32, that is, rearward in a plan view. Here, the side surface of the curved plate 72 on the second inflow cylindrical portion 33 side is gently curved from the upstream side toward the downstream side. The straight plate 73 is provided at the downstream end of the curved plate 72. As shown in FIG. 2, the straight plate 73 is disposed in the inspection port 41 in plan view. The straight plate 73 extends to the downstream side of the second drainage flow path 36. Here, the straight plate 73 extends straight from the downstream end of the curved plate 72 toward the central axis L <b> 11 of the inspection port 41. However, the straight plate 73 may be slightly curved in a plan view. In this case, the straight plate 73 may be smoothly curved integrally with the curved plate 72. As shown in FIG. 5, the upper part of the straight plate 73 is inclined downward toward the downstream side. As shown in FIG. 2, the downstream end of the straight plate 73 is located on the outlet 53 side of the second inlet 52 (leftward of the second inlet 52 in FIG. 2). As a result, the waste water flowing in from the second inflow port 52 can surely flow to the outflow port 53 along the second drainage flow path 36.

  FIG. 9 is an exploded plan view of the drainage trough 30A. In FIG. 9, for convenience of explanation, each member of the drainage basin 30A is disassembled and illustrated, but in reality, each member is connected to each other. As shown in FIG. 9, in the present embodiment, the main body 31 has a cylindrical shape, and has a shape in which the side portion does not spread outward from the inspection port 41 in plan view. The first inflow tubular portion 32 is a tubular member extending rightward from the inspection port 41 in plan view. The second inflow cylindrical portion 33 is a cylindrical member that extends while curving from the inspection port 41 toward the right front side in plan view. The boundary between the first inflow cylindrical portion 32 and the second inflow cylindrical portion 33 is the curved plate 72 of the partition plate 71. The outflow tubular portion 34 is a tubular member extending leftward from the inspection port 41 in plan view. The “mass outlet provided at the side of the main body from which drainage flows out” in the present invention refers to a portion indicated by reference numeral 53a. Reference numeral 53a indicates an opening portion of the main body 31 where the outflow cylindrical portion 34 is connected.

  In addition, the manufacturing method of the drainage basin 30A is not specifically limited. For example, the main body 31, the first inflow cylindrical portion 32, the second inflow cylindrical portion 33, the outflow cylindrical portion 34, the partition plate 71, and the like may be integrally formed with the drainage trough 30A. In this case, it is preferable that the drainage trough 30A is molded using a mold in which these parts are integrated. However, the drainage basin 30A is composed of separate parts such as a main body 31, a first inflow cylindrical portion 32, a second inflow cylindrical portion 33, an outflow cylindrical portion 34, and a partition plate 71, After the parts are molded, the parts may be assembled together. In this case, each part is preferably molded using a mold corresponding to each part.

  Next, a method of using the drainage system 1 provided with the drainage trough 30A will be described. In the drainage system 1 according to the present embodiment, the drainage discharged from the drainage facility 5 is discharged to the sewage main pipe 6 as shown in FIG. Here, the flow of drainage discharged from the drainage facility 5 (the drainage facility 5 shown on the right side of FIG. 1) arranged on the upstream side will be described. Since the flow of the drainage discharged from the drainage facility 5 arranged on the downstream side (the drainage facility 5 shown on the left side in FIG. 1) is the same as the drainage flow discharged from the upstream drainage facility 5, The description in is omitted.

  The drainage discharged from the upstream drainage facility 5 flows through the first branch pipe 21 and flows into the main body 31 through the second inlet 52. As shown in FIG. 2, the wastewater that flows in from the second inlet 52 flows to the second drainage flow path 36. The drainage that has flowed to the second drainage channel 36 flows to the downstream portion of the first drainage channel 35 along the curved plate 72 and the straight plate 73 of the partition plate 71, and then flows to the outflow cylindrical portion 34. As shown in FIG. 1, the waste water that has flowed into the outflow cylindrical portion 34 flows out from the drainage basin 30 </ b> A and flows into the second main pipeline 12. Thereafter, the wastewater that has flowed into the second main pipeline 12 flows into the main body 31 from the first inflow cylindrical portion 32 of the downstream drainage trough 30A. At this time, when the drainage is discharged from the downstream drainage facility 5, the drainage merges with the drainage flowing from the upstream side of the main pipeline 10 in the downstream drainage tank 30A. Thereafter, the wastewater that has flowed into the drainage drain 30 </ b> A flows to the third main pipeline 13. Then, the waste water that has flowed into the third main pipeline 13 flows out to the sewage main pipe 6.

  As described above, in the present embodiment, as shown in FIG. 2, the first inflow tubular portion 32 side is closer to the first drainage flow channel 35 than the portion where the second drainage flow channel 36 is connected in plan view. An angle R formed by the flow path and the second drain flow path 36 is an acute angle. As a result, the wastewater that has flowed into the second drainage flow path 36 from the second inflow cylindrical portion 33 flows along the second drainage flow path 36, and therefore flows into the first drainage flow path 35 in the direction of the flow. To do. Therefore, the drainage easily flows to the downstream side of the first drainage channel 35 and is difficult to flow backward to the upstream side of the first drainage channel 35.

  In a plan view, an intersection point of a straight line L31 extending from the central axis L11 of the inspection port 41 so as to be orthogonal to the central axis L12 of the first inflow port 51 and the central axis L12 of the first inflow port 51 is defined as an intersection point P41. A straight line extending from the intersection point P41 toward the second inlet 52 is defined as a straight line L32. With respect to the intersection point P41, an angle R2 formed by the central axis L12 of the first inflow port 51 and the straight line L32 is 45 degrees. At this time, when an intersection point between the straight line L32 and the central axis L13 of the second inlet 52 is defined as an intersection point P42, the intersection point P42 is outside the inspection port 41 in a plan view, and the second drainage flow path. 36. By disposing the second inlet 52 in such a positional relationship, the distance to the axial direction of the second inlet 52 in the drainage basin 30A can be made shorter than the drainage basin of Patent Document 1. Therefore, it becomes easy to arrange in a narrow area.

  For example, in a plan view, the second inflow tubular portion 33 and the second inflow port 52 are arranged such that the intersection point P42 is located outside the second inflow port 52 (in FIG. 2, in front of the second inflow port 52). Is disposed, the angle R formed by the first drainage flow path 35 and the second drainage flow path 36 becomes a sharper angle than in the case of the drainage trough 30A of the present embodiment. Therefore, the width of the second drainage flow path 36 is narrowed. As a result, the second drainage flow channel 36 overflows, and there is a possibility that part of the drainage flows back to the first inflow cylindrical portion 32. Moreover, if the width | variety of the 2nd drainage flow path 36 becomes narrow, the opening area of the 2nd inflow cylindrical part 33 will become small. Therefore, when an operator performs maintenance to determine whether the second inflow cylindrical portion 33 is damaged or clogged, a maintenance tool (not shown) is inserted from the inspection port 41 to the second inflow cylindrical portion 33. It becomes difficult to insert toward. Therefore, maintenance becomes difficult.

  For example, in the plan view, when the second inflow cylindrical portion 33 and the second inflow port 52 are arranged so that the intersection point P42 is located in the inspection port 41, the waste water flowing in from the second inflow cylindrical portion 33 is It is easy to directly hit the straight plate 73 of the partition plate 71. The drainage that hits the straight plate 73 is likely to be scattered. Then, there is a possibility that part of the scattered drainage flows over the straight plate 73 and flows backward toward the first inflow cylindrical portion 32.

  However, by arranging the second inlet 52 in the positional relationship as in the present embodiment, the width of the second drainage flow path 36 can be secured to some extent. The wastewater that has flowed in from the second inflow cylindrical portion 33 collides with the curved plate 72 of the partition plate 71 and hardly collides with the straight plate 73. Therefore, the wastewater flowing in from the second inflow cylindrical portion 33 is less likely to overflow in the second drainage flow path 36, and the wastewater can flow smoothly to the outlet 53.

In the present embodiment, a partition plate 71 is provided between the first drainage channel 35 and the second drainage channel 36. Therefore, when drainage flows in vigorously from the second inflow cylindrical portion 33, the drainage flows to the upstream side of the first drainage channel 35 beyond the side surface of the second drainage channel 36 by the partition plate 71. In addition, the drainage is easily guided to the downstream side of the first drainage flow path 35 by the partition plate 71. Therefore, it is possible to prevent the wastewater flowing in from the second inflow cylindrical portion 33 from flowing backward from the first inflow cylindrical portion 32 and flowing out.

  In a plan view, the central axis L13 of the second inlet 52 is located closer to the first inflow tubular portion 32 than the center point L11 of the inspection port 41. Here, the side end portion of the second inflow cylindrical portion 33 on the outflow cylindrical portion 34 side is located closer to the first inflow cylindrical portion 32 than the central axis L11 of the inspection port 41. This makes it easier for the wastewater flowing in from the second inlet 52 to collide with the partition plate 71 outside the inspection port 41 in a plan view. Therefore, the wastewater that hits the partition plate 71 is less likely to be scattered and easily flows to the second drainage flow path 36.

  In plan view, at least a part of the connecting margin 62 of the second inflow cylindrical portion 33 overlaps the inspection port 41. Therefore, the axial direction of the 2nd inflow cylindrical part 33 in the drainage can 30A, ie, the distance with respect to the front-back direction, can be made shorter than the drainage tank of patent document 1. FIG. Therefore, it is possible to achieve a more compact size than the drainage basin of Patent Document 1.

  The main body 31, the first inflow cylindrical portion 32, the second inflow cylindrical portion 33, and the outflow cylindrical portion 34 are integrally formed. As a result, the drainage is less likely to leak from the connecting portion of the main body 31, the first inflow cylindrical portion 32, the second inflow cylindrical portion 33, and the outflow cylindrical portion 34. Therefore, the drainage can flow smoothly in the drainage tank 30A.

  As shown in FIG. 8, the partition plate 71 is continuous from the second inflow cylindrical portion 33 and is curved so as to be convex toward the first inflow cylindrical portion 32, and the downstream end of the curved plate 72. And a straight plate 73 extending to the downstream side of the second drainage flow path 36. As a result, the waste water that has flowed in vigorously from the second inflow cylindrical portion 33 tends to flow to the downstream side of the second drainage flow path 36 along the curved plate 72 after hitting the curved plate 72. Therefore, the waste water that has flowed in from the second inflow cylindrical portion 33 easily flows along the curved plate 72 to the outlet 53 of the outflow cylindrical portion 34. Further, since the wastewater that has flowed into the main body 31 from the first inflow cylindrical portion 32 flows along the curved plate 72, it easily flows to the downstream side of the first drainage flow path 35.

  Thus, in this embodiment, the curved plate 72 and the straight plate 73 of the partition plate 71 are drained into the main body 31 from the first inflow cylindrical portion 32 and the main body 31 from the second inflow cylindrical portion 33. It plays a role of guiding the drainage flowing from both the drained water flowing into the outlet cylindrical portion 34. Therefore, even when the length of the drainage tank 30A in the direction of the central axis L13 of the second inflow cylindrical portion 33 is shortened, the drainage that has flowed in from the first inflow cylindrical portion 32 and the second inflow cylindrical portion 33. Can easily flow into the outflow cylindrical portion 34. Accordingly, the drainage trough 30A according to the present embodiment is easier to install than the drainage trough of Patent Document 1 even in a narrow area where members such as other pipes are buried around.

  In order to perform maintenance to determine whether or not the main body 31 is damaged or clogged, a maintenance tool (not shown) for maintenance is inserted from the inspection port 41 toward the main body 31. As shown in FIG. 5, the upper part of the straight plate 73 is inclined downward toward the downstream side. Thus, when the maintenance tool is inserted into the main body 31 through the inspection port 41, the maintenance tool is guided into the main body 31 so as to slide on the slope of the upper part of the straight plate 73. Therefore, the maintenance tool can be smoothly inserted into the main body 31.

  As shown in FIG. 7, when viewed from the first inflow cylindrical portion 32 side, at least a part of the partition plate 71 is disposed inside the first inflow port 51. As a result, the width of the second drainage channel 36 can be increased. Therefore, the amount of drainage flowing in the second drainage channel 36 can be increased. In addition, the waste water that has flowed into the main body 31 from the second inflow cylindrical portion 33 can easily flow downstream along the curved plate 72 of the partition plate 71. Therefore, it is possible to make it difficult for the wastewater in the second drainage flow path 36 to flow backward from the second inflow cylindrical portion 33 and to flow out.

  As shown in FIG. 2, the second inflow cylindrical portion 33 is provided from the side of the main body 31 to the side of the first inflow cylindrical portion 32 in plan view. As a result, the distance of the second drainage flow path 36 can be secured in the main body 31. Therefore, even when the amount of drainage flowing in from the second inflow cylindrical portion 33 is large, the drainage can be prevented from clogging in the second drainage flow path 36.

  When drainage flows into the main body 31 from the second inflow cylindrical portion 33, the drainage collides with the curved plate 72 of the partition plate 71. Since the drainage that hits the curved plate 72 is likely to be scattered in all directions, there is a possibility that it will be scattered in the main body 31. However, in the present embodiment, the curved plate 72 is provided outside the inspection port 41 and between the first inflow cylindrical portion 31 and the second inflow cylindrical portion 32 in plan view. Therefore, since the waste water that collides with the curved plate 72 scatters into the second inflow cylindrical portion 32, it can be made more difficult to scatter into the main body 31.

  In plan view, the second inflow cylindrical portion 33 is curved so as to protrude toward the first inflow cylindrical portion 32. The second inflow cylindrical portion 33 is slightly curved so as to face the outlet 53 side toward the downstream side. As a result, the waste water that has flowed into the second inflow cylindrical portion 33 from the second inflow port 52 easily flows to the outflow port 53 along the curved portion of the second inflow cylindrical portion 33. Therefore, the waste water that has flowed into the second inflow cylindrical portion 33 can be prevented from flowing backward from the first inflow cylindrical portion 32.

  As shown in FIG. 4, an inclined portion 35 a that is inclined downward toward the downstream side is provided on the bottom surface of the middle portion of the first drainage channel 35. This makes it difficult for the wastewater that has flowed into the downstream side of the first drainage flow channel 35 to flow backward to the upstream side of the first drainage flow channel 35 by the inclined portion 35a. Therefore, it is possible to prevent the wastewater that has flowed into the downstream side of the first drainage flow channel 35 from flowing backward from the first inflow cylindrical portion 32 and flowing out.

  The outlet 53 through which the drainage flows out is provided at the downstream end of the outflow cylindrical portion 34. Thus, a distance is secured between the outflow port 53 and the downstream end of the first drainage flow path 35 by the outflow cylindrical portion 34. Therefore, it is possible to make it difficult for the drainage flowing downstream of the main pipeline 10 to flow into the first drainage channel 35 in the main body 31 from the outlet 53.

  The drainage trough 30A according to this embodiment has been described above. However, the drainage basin according to the present invention is not limited to the drainage basin 30A according to the above embodiment, but can be implemented in various other forms.

<Other embodiments>
FIG. 9 is a plan view of a drainage basin 30B according to another embodiment. FIG. 10 is a right side view of a drainage basin 30B according to another embodiment. As shown in FIG. 9, the drainage trough 30 </ b> B includes an elbow pipe 90. The elbow pipe 90 is rotatably connected to the second inflow cylindrical portion 33 of the drainage basin 30B. The downstream end of the elbow pipe 90 is connected to the connecting margin 62 of the second inflow cylindrical portion 33. An upstream end of the elbow pipe 90 is connected to the branch pipe line 20. As shown in FIG. 10, in a side view, the straight line passing through the end face of the elbow pipe 90 and the straight line passing through the end face of the downstream end are orthogonal to each other. However, in a side view, the straight line passing through the upstream end face of the elbow pipe 90 and the straight line passing through the downstream end face need not be orthogonal. In FIG. 10, the upstream end of the elbow pipe 90, that is, the end face on the side to which the branch pipe 20 is connected opens upward, but the direction of the opening is not particularly limited. According to the present embodiment, the branch conduit 20 is connected to the second conduit 20 via the elbow 90 even if the branch conduit 20 connected to the second inflow tubular portion 33 extends in any direction. It becomes easy to connect with 2 inflow cylindrical part 33.

  In the above embodiments, “parallel” and “orthogonal” include “substantially parallel” and “substantially orthogonal”, respectively.

<Modification>
In the above embodiment, there is one drainage facility 5 connected to the drainage trough 30A. However, the number of drainage facilities 5 connected to the drainage trough 30A is not particularly limited. For example, a plurality of drainage facilities 5 may be connected to one drainage trough 30 </ b> A via the branch pipe line 20.

  In the above embodiment, the main body 31 of the drainage trough 30A is provided with two inflow ports into which drainage flows. However, three or more inflow ports into which drainage flows may be provided in the main body 31. For example, a third inlet (not shown) may be provided on the side of the main body 31.

DESCRIPTION OF SYMBOLS 1 Drainage system 30A, 30B Drainage 31 Mass main body 32 1st inflow cylindrical part 33 2nd inflow cylindrical part 34 Outflow cylindrical part 35 1st drainage flow path 36 2nd drainage flow path 51 1st inflow port 52 2nd Inlet 53 Outlet 41 Inspection port 71 Partition plate 72 Curved plate 73 Straight plate

The drainage basin according to the present invention comprises a substantially cylindrical basin body, a first inflow cylindrical part, a second inflow cylindrical part, an outlet, a first drainage channel, and a second drainage channel. I have. The main body has an inspection port opened upward. The first inflow tubular portion has a first inflow port through which drainage flows, and is provided on a side portion of the main body. The second inflow tubular portion has a second inflow port through which drainage flows, and at least a part thereof is provided on a side portion of the main body. The outlet is provided on the side of the main body, and drainage flows out. The first drainage flow channel is connected to the first inflow tubular portion and the outlet in the main body. The second drainage channel is connected to the first drainage channel and the second inflow port in the main body and the second inflow cylindrical portion. In a plan view, an angle formed between the first drainage channel and the second drainage channel is more acute than the portion of the first drainage channel where the second drainage channel is connected. It is. In a plan view, a straight line passing through the end face of the first inlet is orthogonal to a straight line passing through the end face of the second inlet. In a plan view, an intersection between the central axis of the first inlet and a first straight line extending from the central point of the inspection port so as to be orthogonal to the central axis of the first inlet is a first intersection. A straight line extending from the first intersection point to the second inlet side so as to form an angle of 45 degrees with the central axis of the first inlet port with the first intersection point as the center is a second line. When a straight line is formed, a second intersection point where the second straight line and the central axis of the second inflow port intersect is located outside the inspection port and on the second drainage channel. A partition plate extending upward is provided between the first drainage channel and the second drainage channel. The upstream end of the partition plate is provided outside the inspection port in a plan view and between the first inflow cylindrical portion and the second inflow cylindrical portion.

Claims (13)

A substantially cylindrical main body having an inspection opening opened upward;
A first inflow tubular portion having a first inflow port through which drainage flows, provided on a side of the main body;
A second inflow tubular portion having a second inflow port through which drainage flows, at least a part of which is provided on the side of the main body;
An outlet provided on the side of the main body and from which drainage flows;
In the main body, a first drainage flow channel connected to the first inflow tubular portion and the outlet,
A second drainage channel connected to the first drainage channel and the second inflow port in the main body and the second inflow cylindrical portion;
With
In a plan view, an angle formed between the first drainage channel and the second drainage channel is more acute than the portion of the first drainage channel where the second drainage channel is connected. And
In plan view, a straight line passing through the end face of the first inlet and a straight line passing through the end face of the second inlet are orthogonal to each other;
In a plan view, an intersection between the central axis of the first inlet and a first straight line extending from the central point of the inspection port so as to be orthogonal to the central axis of the first inlet is a first intersection. A straight line extending from the first intersection point to the second inlet side so as to form an angle of 45 degrees with the central axis of the first inlet port with the first intersection point as the center is a second line. When it is a straight line, the second intersection point where the second straight line and the central axis of the second inflow port intersect is outside the inspection port and located on the second drainage flow path,
A partition plate extending upward is provided between the first drainage channel and the second drainage channel, and drains.   The drain according to claim 1, wherein the second inflow cylindrical portion is curved so as to protrude toward the first inflow cylindrical portion in a plan view. The second inflow cylindrical part has a connecting margin to which a pipe is connected,
The drainage according to claim 1 or 2, wherein at least a part of the connecting margin overlaps the inspection port in a plan view.   The said main body and said 2nd inflow cylindrical part are drained as described in any one of Claim 1 to 3 currently shape | molded integrally.   The planar axis is described in any one of claims 1 to 4, wherein a central axis of the second inflow port is located closer to the first inflow cylindrical portion than a center point of the inspection port. Drain. The partition plate is
A curved plate that is continuous from the second inflow cylindrical portion and is curved so as to protrude toward the first inflow cylindrical portion in plan view;
A straight plate provided at the downstream end of the curved plate and extending downstream of the second drainage flow path;
The drainage according to any one of claims 1 to 5, comprising:   The upper part of the said straight board is drained as described in Claim 6 which inclines below toward the downstream.   The said curved plate is an outer side of the said inspection port in planar view, Comprising: It is provided between the said 1st inflow cylindrical part and the said 2nd inflow cylindrical part. Drained.   The drainage according to any one of claims 1 to 8, wherein the second inflow cylindrical portion is provided from a side portion of the main body to a side portion of the first inflow cylindrical portion. The   The drain according to any one of claims 1 to 9, wherein an inclined portion inclined downward toward the downstream side is provided on a bottom surface of a middle portion of the first drainage flow path.   The at least one part of the said partition plate is arrange | positioned in the position visually recognized through the said 1st inflow port, when it sees from the axial direction of a said 1st inflow cylindrical part. Drainage listed on one. Including an outflow cylindrical portion provided on the side of the main body,
The drain according to any one of claims 1 to 11, wherein the outlet is provided at a downstream end of the outflow cylindrical portion.   Drainage according to any one of claims 1 to 12, wherein an elbow pipe is pivotally connected to the second inflow cylindrical portion.

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