Indirect drainage fittings and indirect drainage structures

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The indirect drainage joint enables flexible installation and maintenance by rotating components with a releasable locking mechanism and a reducing joint, addressing orientation restrictions and overflow issues.

JP2026113346APending Publication Date: 2026-07-07MIRAI KOGYO KK

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Patent Information

Authority / Receiving Office: JP · JP
Patent Type: Applications
Current Assignee / Owner: MIRAI KOGYO KK
Filing Date: 2024-12-25
Publication Date: 2026-07-07

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Abstract

The present invention provides an indirect drainage joint that allows the direction of the separation operation to be changed, and enables the separation operation to be easily performed regardless of the piping route. [Solution] The indirect drainage joint 10 is provided with an inlet 22 into which wastewater can flow, an outlet 31 into which wastewater can be discharged, and an opening 35 that connects the flow path forming space to the outside, and a drain pipe can be connected to the inlet 22 and the outlet 31. It comprises an upstream component 20 having an inlet 22 and a downstream component 39 having an outlet 31, the opening 35 is provided in the downstream component 30, the upstream component 20 has an annular assembly part 24, and the downstream component has a locking part 39 that can be locked to the assembly part 24. When the locking part 39 is locked to the assembly part 24, the locking state between the assembly part 24 and the locking part 39 can be released at any position by relatively rotating the upstream component 20 and the downstream component 30 with the center of the assembly part 24 as the axis of rotation.

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Description

Technical Field

[0001] The present invention relates to an indirect drainage joint provided in the middle of a drainage path and an indirect drainage structure.

Background Art

[0002] Conventionally, an indirect drainage joint including an inflow portion located above and allowing drainage to flow into the flow path forming space from the outside, an outflow portion located below and discharging drainage from the flow path forming space to the outside, and an opening portion communicating the flow path forming space with the outside is arranged in the drainage path. When drainage overflows from the outflow portion, in order to suppress backflow to the inflow portion, the overflowing drainage is discharged to the outside through the opening.

[0003] As such an indirect drainage joint, there is an indirect drainage joint described in Patent Document 1. In the indirect drainage joint described in Patent Document 1, an upper member and a lower member can be fitted by fitting a locking portion formed on a cylindrical wall extending downward from the outer periphery into a slit formed in a peripheral wall portion. And when performing maintenance or the like, the locking portion can be detached from the slit by pressing the locking portion with a tool or the like, and the indirect drainage joint can be disassembled.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the indirect drainage joint described in Patent Document 1, if multiple pipes are connected to the upstream side, or if the pipes connected to the upstream side are eccentric from the central axis of the indirect drainage joint, the orientation of the upper member and the orientation of the locking part are determined by the orientation and position of the pipe route. The orientation of the slit of the lower member is also determined, and there is no problem if its orientation faces the side that is easy to work with, for example, towards the user. However, if it is not possible to face the user towards the user and the lower member is to be bonded and fixed to the downstream side, disassembly work may become difficult. Also, if the slit of the lower member is oriented toward the side that is easy to work with and bonded and fixed to the downstream side, the orientation of the upper member is determined, which restricts the pipe route and makes workability poor.

[0006] The present invention was made to solve the above problems, and its main objective is to provide an indirect drainage joint that allows the direction of the separation work to be changed and enables the separation work to be easily performed regardless of the piping route. [Means for solving the problem]

[0007] The first configuration is an indirect drainage joint having a fluid-passable flow channel forming space inside, an inlet located at the top into which drainage can flow from the outside into the flow channel forming space, an outlet located at the bottom into which drainage can be discharged from the flow channel forming space to the outside, and an opening that connects the flow channel forming space to the outside, wherein a drainage pipe can be connected to the inlet and the outlet, comprising an upstream component having the inlet and a downstream component having the outlet, wherein the opening is provided in at least one of the upstream component and the downstream component, and / or is formed when the upstream component and the downstream component are combined. The upstream component and the downstream component each have an annular assembly portion, and the other of the upstream component and the downstream component each have a locking portion that can be locked to the assembly portion. The upstream component and the downstream component can be assembled by the relative proximity movement of the assembly portion and the locking portion, and relative separation movement is suppressed by the locking portion locked to the assembly portion. In the state in which the locking portion is locked to the assembly portion, the locking state between the assembly portion and the locking portion can be released at any position obtained by relatively rotating the upstream component and the downstream component with the center of the assembly portion as the axis of rotation.

[0008] In the first configuration, even when the relative positions of the locking parts are changed by rotating the upstream and downstream components relative to each other, the locking state between the locking part and the assembly part can be released. Therefore, the indirect drainage joint can be installed in a direction that makes it easy to release the locking state by the locking part, and the situation in which the drainage pipe route is restricted when the joint is installed in a direction that makes it easy to release the locking state by the locking part can be suppressed.

[0009] The second configuration, in addition to the first configuration, has a cylindrical outer fitting assembly portion on one of the upstream and downstream components, and a cylindrical inner fitting assembly portion on the other of the upstream and downstream components. One of the inner fitting portion and the outer fitting assembly portion has a stepped portion formed in an annular shape along the circumferential direction that functions as the assembly portion, and the other of the inner fitting portion or the outer fitting assembly portion has a locking portion provided on a part of the circumferential direction that can lock onto the stepped portion, and the locking portion is displaceable from a position where it locks onto the stepped portion to a retracted position where it does not lock.

[0010] In the second configuration, since both the external fitting assembly part and the internal fitting assembly part are cylindrical, there are no restrictions on their orientation when assembled, and the relative angle around the central axis can be freely changed.

[0011] The third configuration, in addition to the first configuration, allows at least one of the upstream component and the downstream component to connect to a plurality of drainage pipes.

[0012] When connecting multiple drain pipes to an indirect drainage joint, the drainage route becomes complex, which likely imposes constraints on the position of the locking mechanism. In this regard, the third configuration allows the position of the locking mechanism to be oriented in a way that makes it easy to release the lock, even when prioritizing the positions of the multiple drain pipes connected to the component on the side without a locking mechanism.

[0013] The fourth configuration is provided with the locking portion on the downstream component in addition to any of the first to third configurations, the upstream component comprises a plurality of inlet portions, the inlet portions are located vertically above the outlet portion, and the inlet portions can maintain their position vertically above the outlet portion when the upstream component and the downstream component are rotated relative to each other.

[0014] In the fourth configuration, the inlet is located vertically above the outlet, resulting in good drainage efficiency. Furthermore, even when the upstream and downstream components are rotated relative to each other, the inlet remains vertically above the outlet, thus maintaining drainage efficiency.

[0015] The fifth configuration is an indirect drainage structure in which an indirect drainage joint is provided in the drainage path, the joint having a fluid-passable flow path forming space inside, a plurality of inlet sections located at the top into which drainage can flow from the outside into the flow path forming space, an outlet section located at the bottom into which drainage can be discharged from the flow path forming space to the outside, and an opening that connects the flow path forming space to the outside, and a drainage pipe is connected to each of the plurality of inlet sections, and all of the plurality of inlet sections are located vertically above the outlet section.

[0016] In the fifth configuration, similar to the fourth configuration, the inlet is located vertically above the outlet, which improves drainage efficiency.

[0017] The sixth configuration, in addition to the fifth configuration, is such that the flow path cross-sectional area of the outlet is greater than the sum of the flow path cross-sectional areas of the multiple drain pipes connected to the inlet, and one side of a cylindrical reducing joint, in which the inner diameter of one side is greater than the inner diameter of the other side, is connected to the outlet.

[0018] In the sixth configuration, the cross-sectional area of the outflow section is larger than the sum of the cross-sectional areas of the inflow sections, which helps to prevent wastewater from overflowing once it reaches the inside of the outflow section. Furthermore, since a reducing joint is connected to the outflow section, it can be connected to another drainpipe via this reducing joint. [Brief explanation of the drawing]

[0019] [Figure 1] This is a perspective view of an indirect drainage joint. [Figure 2] This is a perspective view of the indirect drainage joint from the bottom side. [Figure 3] This is a plan view of an indirect drainage joint. [Figure 4] This is a bottom view of an indirect drainage joint. [Figure 5] This is a front view of an indirect drainage joint. [Figure 6] This is a side view of an indirect drainage joint. [Figure 7] It is a sectional view taken along line A-A. [Figure 8] It is a sectional view taken along line B-B. [Figure 9] It is an enlarged view of the portion enclosed by the dashed-dotted line in FIG. 7. [Figure 10] It is an enlarged view of the portion enclosed by the dashed-dotted line in FIG. 8. [Figure 11] It is a front view of the upstream structure. [Figure 12] It is a side view of the upstream structure. [Figure 13] It is a sectional view taken along line C-C. [Figure 14] It is a sectional view taken along line D-D. [Figure 15] It is a front view of the downstream structure. [Figure 16] It is a side view of the downstream structure. [Figure 17] It is a sectional view taken along line E-E. [Figure 18] It is a sectional view taken along line F-F. [Figure 19] It is a front view of the state where a mesh body is attached to the indirect drainage joint. [Figure 20] It is a front view of the state where a reducing joint is attached to the indirect drainage joint. [Figure 21] It is a sectional view taken along line G-G. [Figure 22] It is a view showing the state of using the indirect drainage joint with a drain pipe connected.

Mode for Carrying Out the Invention

[0020] The indirect drainage joint 10 according to the present embodiment is formed of a hard resin or metal, is installed in a drainage path and used, and drainage flows in from one side as the upstream side and outflows from the other side as the downstream side. In the following description, the upstream side where the drainage flows in is regarded as the upper side, the downstream side where the drainage flows out is regarded as the lower side, and the drainage is assumed to flow in the vertical direction.

[0021] As shown in Figures 1 to 18, the indirect drainage joint 10 is composed of an upstream component 20 provided on the upper side and a downstream component 30 provided below the upstream component 20. First, the structure of the upstream component 20 will be described with reference to Figures 1 to 14. The upstream component 20 has a disc-shaped top plate portion 21 with a substantially uniform thickness. Two cylindrical inlet portions 22 are provided on this top plate portion 21, penetrating it vertically and protruding both above and below the top plate portion 21. These two inlet portions 22 are identical in shape, their outer diameter is smaller than the radius of the top plate portion 21, and both are located in positions that do not include the center of the top plate portion 21. In other words, the inlet portions 22 are provided eccentrically with respect to the top plate portion 21. Furthermore, the two inlet portions 22 are located symmetrically with respect to the center of the top plate portion 21.

[0022] On the lower surface slightly inside the outer circumference of the top plate portion 21, a cylindrical internal assembly portion 23 is provided, extending downwards and having its central axis coincide with that of the top plate portion 21. At the lower end of this internal assembly portion 23, a stepped portion 24 is provided, bulging radially outwards. The upper and lower surfaces of this stepped portion 24 are horizontal planes in the vertical, horizontal, and vertical directions. On the inner circumference side of the internal assembly portion 23, a cylindrical upper inner ring portion 25 is provided, extending downwards from the top plate portion 21 and having its central axis coincide with that of both the top plate portion 21 and the internal assembly portion 23. The vertical width and thickness of this upper inner ring portion 25 are approximately uniform. That is, the distance between the inner surface of the internal assembly portion 23 and the outer surface of the upper inner ring portion 25 is uniform, and it can be said that a circular recess of uniform width is provided between the internal assembly portion 23 and the upper inner ring portion 25.

[0023] Next, the structure of the downstream component 30 will be described with reference to Figures 1-10 and 15-18. The downstream component 30 is equipped with a cylindrical outflow section 31. The inner diameter of this outflow section 31 is approximately equal to the inner diameter of the upper inner ring section 25, which is located below the top plate section 21 of the upstream structure 20. In other words, the inner diameter of the outflow section 31 is smaller than the outer diameter of the top plate section 21 of the upstream structure 20, and is large enough to accommodate the two inflow sections 21 provided on the top plate section 21 in a plan view. Furthermore, the cross-sectional area of the flow path of the outflow section 31 is larger than the sum of the cross-sectional areas of the two inflow sections 22.

[0024] The upper end of the outlet section 31 is provided with an annular lower flange section 32 that protrudes outward. The outer diameter of this lower flange section 32 is slightly larger than the outer diameter of the top plate section 21, and its upper and lower surfaces are substantially horizontal in the front-rear, left-right, and right-hand directions. The inner circumferential surface of the lower flange section 32 is provided with a cylindrical lower inner ring section 33 that is erected upward. The inner circumferential surface of this lower inner ring section 33 is flush with the inner circumferential surface of the outlet section 31, and the radial thickness of the lower inner ring section 33 is substantially equal to the radial thickness of the upper inner ring section 25. That is, the inner diameter and outer diameter of the lower inner ring section 33 are substantially equal to the inner diameter and outer diameter of the upper inner ring section 25, respectively.

[0025] On the upper surface of the lower flange portion 32, a cylindrical flow channel portion 34 is provided on the outside of the lower inner ring portion 33, with its central axis coinciding with the outlet portion 31 and the lower inner ring portion 33, and extending upward. The inner and outer diameters of the flow channel portion 34 are equal to the inner and outer diameters of the internal assembly portion 23 of the upstream structure 20, respectively, and the distance between the flow channel portion 34 and the lower inner ring portion 33 is approximately equal to the distance between the internal assembly portion 23 and the upper inner ring portion 25. Multiple openings 35, which are holes that penetrate radially, are provided in the flow channel portion 34. All of these openings 35 are of the same shape, a trapezoidal shape that is slightly narrower at the top and taller than the width of the lower end, and are provided at equal intervals.

[0026] An annular upper flange portion 36 is provided at the upper end of the flow channel portion 34, extending outward. The inner and outer diameters of this upper flange portion 36 are substantially uniform, its outer diameter is substantially equal to the diameter of the top plate portion 21 of the upstream structure 20, and its upper and lower surfaces are horizontal in the front-rear and left-right directions. A cylindrical outer fitting assembly portion 37 is provided on the outer circumference of the upper flange portion 36, extending upward, and protrusions 38 are provided at two locations on the peripheral wall of the outer fitting assembly portion 37, projecting outward. For the portion of the outer fitting assembly portion 37 other than where the protrusions 38 are provided, the inner diameter is substantially equal to the outer diameter of the stepped portion 24 provided on the lower end side of the internal fitting assembly portion 23, and the outer diameter is substantially equal to the outer diameter of the top plate portion 21.

[0027] The outer circumferential surface of the projection 38 is an arc-shaped surface that is curved in the circumferential direction and is a vertical surface in the vertical direction. On the other hand, a locking portion 39 is formed on the inner circumferential surface of the projection 38, which protrudes inward at a constant angle from the top to the bottom. Furthermore, the locking portion 39 does not extend to the upper flange portion 36, and a gap 40 is provided between the bottom surface of the locking portion 39 and the top surface of the upper flange portion 36, and this gap 40 penetrates to the outer circumferential surface of the projection. The height of this gap 40 is approximately equal to the vertical width of the stepped portion 24 of the internal assembly portion 23 of the upstream component 20.

[0028] An outer cylindrical portion 21 is provided on the outer circumference of the lower flange portion 32, extending downwards. The distance between this outer cylindrical portion 41 and the outflow portion 31 is approximately uniform, and a cylindrical gap extending in the vertical direction is provided between the outer cylindrical portion 41 and the outflow portion 31. The outer diameter of this outer cylindrical portion 41 is approximately equal to the outer diameter of the lower flange portion 32, and is therefore slightly larger than the outer diameter of the top plate portion 21.

[0029] The method for connecting the upstream component 20 and the downstream component 30, which are configured as described above, will be explained with reference to Figures 1 to 10. When combining the upstream component 20 and the downstream component 30, the central axes of the upstream component 20 and the downstream component 30 are aligned and they are moved relative to each other in the direction of proximity (vertical direction). In this state, the relative angle around the central axis of the upstream component 20 and the downstream component 30 can be arbitrary, and they can be combined at any relative angle. When the upstream component 20 and the downstream component 30 are moved relative to each other in the direction of proximity, first, the lower end of the internal assembly portion 23 of the upstream component 20 comes into contact with the inclined surface on the upper side of the locking portion 39 of the downstream component 30. In this state, if the upstream component 20 and the downstream component 30 are moved relative to each other in a direction that brings them closer together, the protruding portion 38 on which the locking portion 39 is provided will bend outward, and the stepped portion 24 of the internal assembly portion 23 will fit into the lower part of the bottom surface of the locking portion 39. In this state, the lower ends of the internal assembly portion 23 and the stepped portion 24 will be in contact with or close to the upper surface of the upper flange portion 36, the outer peripheral surface of the stepped portion 24 will be in contact with or close to the inner peripheral surface of the external fitting assembly portion 37, and the stepped portion 24 will fit into the gap 40 between the bottom surface of the locking portion 39 and the upper flange portion 36. Also, the upper end of the external fitting assembly portion 37 will be in contact with or close to the lower surface of the outer peripheral surface of the top plate portion 21.

[0030] As described above, when combining the upstream component 20 and the downstream component 30, a cylindrical mesh body 50 is arranged as an internal member in the flow path forming space formed inside the upstream component 20 and the downstream component 30, as shown in Figure 19. This mesh body 50 is made of a known material such as resin or metal. If it is made of resin, it is integrally molded to form a grid, and if it is made of metal or fibrous resin, it is formed by weaving it to form a grid. The height of this mesh body 50 is approximately equal to the distance between the lower surface of the top plate portion 21 of the upstream component 20 and the upper surface of the lower flange portion 32 of the downstream component 30 when the upstream component 20 and the downstream component 30 are combined. Furthermore, the outer diameter of the mesh body 50 is approximately equal to the inner diameter of the internal assembly portion 23 of the upstream component 20 and the inner diameter of the flow channel portion 34 of the downstream component 30, and the inner diameter of the mesh body 50 is approximately equal to the outer diameter of the upper inner ring portion 25 of the upstream component 20 and the outer diameter of the lower inner ring portion 33 of the downstream component 30.

[0031] The upper end of the mesh body 50 is positioned between the internal assembly portion 23 and the upper inner ring portion 25 of the upstream component 20, and the lower end is positioned between the flow channel portion 34 and the lower inner ring portion 33 of the downstream component 30. The upper end is close to or in contact with the lower surface of the top plate portion 21 of the upstream component 20, and the lower end is in contact with the upper surface of the lower flange portion 32 of the downstream component 30. In this case, when combining the upstream component 20 and the downstream component 30, the connection between the upstream component 20 and the downstream component 30 can be performed by placing the mesh body 50 between the flow channel portion 34 and the lower inner ring portion 33 of the downstream component 30, and then placing the upstream component 50 over the downstream component 30 and the mesh body 50 from above.

[0032] On the other hand, to release the state in which the upstream component 20 and the downstream component 30 are joined together, the locking portion 39 is bent radially outward. Specifically, as shown in Figure 3, the protruding portion 38 of the downstream component 30 is located radially outside the top plate portion 21 in a plan view, and the vicinity of the upper end of the locking portion 39 is visible. Therefore, by inserting a tool such as a flathead screwdriver into the inclined surface on the upper side of the locking portion 39 and pressing the locking portion 39, the locking portion 39 is bent and retracted to the release position, thereby releasing the locking state of the locking portion 39 to the stepped portion 24. In releasing the locking state by the locking portion 39 in this way, the relative angle around the central axis of the upstream component 20 and the downstream component 30 can be any angle, and can be any angle. The inclined surface on the upper side of the locking portion 39 is the surface used when inserting a tool or the like to release it, so it can also be called the release portion.

[0033] As described above, when installing the indirect drainage joint 10, which connects the upstream component 20 and the downstream component 30, to the drainage path, a reducing joint 60 is attached to the lower end of the downstream component 30, as shown in Figures 20 and 21. The reducing joint 60 is cylindrical in shape and extends vertically. The upper end has a cylindrical large-diameter portion 61, and the lower end has a cylindrical small-diameter portion 63 with a smaller inner diameter than the large-diameter portion 61 and whose central axis coincides with the large-diameter portion 61. The large-diameter portion 61 and the small-diameter portion are connected by a frustoconical reduced-diameter portion 62 that tapers downwards. The inner diameter of the large-diameter portion 61 is approximately equal to the outer diameter of the outflow portion 31 of the downstream component 30, and the outer diameter of the large-diameter portion 61 is slightly smaller than the inner diameter of the outer cylinder portion 41. Furthermore, the inner diameter of the small-diameter section 63 is greater than the length of the line segment connecting the two end edges of the pair of inlet sections 21 of the upstream component 20. That is, the pair of inlet sections 21 are located vertically above the small-diameter section 63, and in plan view, the pair of inlet sections 21 are housed inside the small-diameter section 63. The upper end of this reducing joint 60 is inserted between the outlet section 31 and the outer cylinder section 41 of the downstream component 30 and is adhesively fixed to the downstream component 30. In Figure 20, the reducing joint 60 is shown to be inserted between the outlet section 31 and the outer cylinder section 41, but a reducing joint 60 with a larger diameter than the outer diameter of the outer cylinder section 41 may be prepared and adhesively fixed to the outer surface of the outer cylinder section 41.

[0034] As shown in Figure 22, the indirect drainage joint 10, configured as described above, is installed in the drainage path. Different drainage pipes 70 are attached to the inlet 22 of the indirect drainage joint 10, and a drainage pipe (not shown) is also attached to the lower end of the reducing joint 60, which is bonded and fixed to the outlet 31 of the indirect drainage joint 10. With the drainage pipes 70 installed in this way, the inner diameter of the outlet 31 is large enough to accommodate the two inlet 21 in a plan view, so the water discharged from the drainage pipes 70 flows directly into the outlet 31.

[0035] When multiple drain pipes 70 are connected, the upstream component 20 is restricted from rotating around its central axis. On the other hand, the downstream component 30 can rotate around its central axis, so the downstream component 30 is rotated around its central axis in advance to position the locking portion 39 in a position that facilitates release, for example, a position where piping or other components are less likely to interfere during release. In Figure 21, the orientation of the downstream component 30 is adjusted so that the protrusion 38 on the inner circumferential surface of the locking portion 39 is not located below the drain pipe 70. After adjusting the position of the locking portion 39 by rotating the downstream component 30 in this way, the drain pipe is connected to the lower end of the reducing joint 60. When connecting the drain pipe to the lower end of this reducing joint 60, even if it is fixed with adhesive, the position of the locking portion 39 can already be maintained in a position that facilitates release.

[0036] When the indirect drainage joint 10 is installed and used in the drainage path as described above, if the amount of water flowing into the downstream drainage path is excessive or if a blockage occurs, the wastewater that would have been discharged from the outlet 31 will be discharged from the opening 35. At this time, the mesh body 50 placed on the inner surface of the opening 35 can prevent debris from being discharged along with the wastewater discharged from the opening 35. However, if the debris adheres to the mesh body 50, the mesh of the mesh body 50 will gradually become blocked, and it may become necessary to replace or clean the mesh body 50. In this case, as described above, the locking part 39 is released from being locked to the stepped part 24, and the upstream component 20 and the downstream component 30 are separated to remove the mesh body 50. In addition to replacing or cleaning the mesh body 50, maintenance such as cleaning the indirect drainage joint 10 should also be performed by separating the upstream component 20 and the downstream component 30.

[0037] The above configuration provides the following effects of the indirect drainage joint 10 according to this embodiment.

[0038] Even when the upstream component 20 and the downstream component 30 are rotated relative to each other to change the relative position of the locking portion 39, the locking state between the locking portion 39 and the stepped portion 24 can be released. Therefore, the indirect drainage joint 10 can be installed in a position that makes it easy to release the locking state by the locking portion 39, and the situation in which the path of the drain pipe 70 is restricted when the locking state by the locking portion 39 is released can be suppressed.

[0039] Since the stepped portion 24 is provided in an annular shape around the entire circumference of the cylindrical internal assembly portion 23, the relative angle between the upstream component 20 and the downstream component 30 can be changed without restriction.

[0040] Since the inlet 22 is located vertically above the outlet 31, drainage efficiency is good. Furthermore, even when the upstream component 20 and the downstream component 30 are rotated relative to each other, the inlet 22 remains located vertically above the outlet 31, thus maintaining drainage efficiency.

[0041] Since the cross-sectional area of the flow path of the outlet section 31 is larger than the sum of the cross-sectional areas of the flow paths of the inlet section 22, it is possible to prevent wastewater that reaches the inside of the outlet section 31 from overflowing. Furthermore, since a reducing joint 60 is connected to the outlet section 31, it can be connected to another drain pipe via the reducing joint 60.

[0042] With the reducing joint 60 connected to the outlet section 31, the pair of inlet sections 21 are located vertically above the small-diameter section 63, and in a plan view, the pair of inlet sections 21 are housed inside the small-diameter section 63. As a result, in the process of wastewater flowing in from the drain pipe 70 connected to the inlet section 21, passing through the indirect drainage joint 10 to the reducing joint 60, and being discharged from the small-diameter section 63, there is nothing obstructing drainage inside the indirect drainage joint 10 or the reducing joint 60, thereby improving drainage efficiency.

[0043] <Variation> In this embodiment, the number of inlet sections 22 provided in the upstream component 20 is set to 2, but there may be 3 or more.

[0044] In this embodiment, all of the inlet sections 22 of the upstream component 20 are located eccentrically from the central axis of the upstream component 20. However, the central axis of one of the inlet sections 22 may be aligned with the central axis of the upstream component 20. In this case as well, the other inlet section 22 is located eccentrically from the central axis of the upstream component 20, so the same effects as in this embodiment can be obtained. Similarly, even when there are three or more inlet sections 22, the central axis of one of the inlet sections 22 may be aligned with the central axis of the upstream component 20.

[0045] The number of inlet sections 22 may be one. In this case, the same effects as in the embodiment can be obtained if the central axis of the inlet section 22 is eccentric from the central axis of the upstream component 20.

[0046] In this embodiment, the upstream component 20 is provided with an internal fitting portion 23 and the downstream component 30 is provided with an external fitting portion 37. However, the upstream component 20 may be provided with a component corresponding to the external fitting portion, and the downstream component 30 may be provided with a component corresponding to the internal fitting portion.

[0047] In this embodiment, a locking portion 39 is provided on a part of the circumferential direction of the outer fitting assembly portion 37. However, it is also possible to provide a structure corresponding to the stepped portion 24 of the internal fitting assembly portion 23 around its entire circumference, making it uniform in shape with the circumferential direction of the outer fitting assembly portion 37, and providing a structure corresponding to the locking portion 39 on a part of the circumferential direction of the internal fitting assembly portion 23. The same applies when the upstream component 20 is provided with a structure corresponding to the outer fitting assembly portion and the downstream component 30 is provided with a structure corresponding to the internal fitting assembly portion.

[0048] In this embodiment, the external fitting assembly portion 37 is cylindrical in shape, and a locking portion 39 is provided on a part of its circumferential direction. However, the external fitting assembly portion 37 may be omitted, and only the component corresponding to the locking portion 39 may be erected from the upper surface of the upper flange portion 36. The same applies when a component corresponding to the internal fitting assembly portion is provided on the downstream component 30. Furthermore, if the external fitting assembly portion 37 has a circumferential shape that is uniform with the component corresponding to the stepped portion 24 of the internal fitting assembly portion 23, then only the component corresponding to the locking portion 39 may be provided on the other side.

[0049] In this embodiment, the downstream component 30 is provided with a flow channel section 34 and an opening 35, but the upstream component 20 may be provided with a configuration corresponding to the flow channel section 34 and the opening 35. Alternatively, the upstream component 20 and the downstream component 30 may be combined to form a configuration corresponding to the flow channel section 20 and a configuration corresponding to the opening 35.

[0050] In this embodiment, a cylindrical drain pipe is connected to the inlet 22 and a cylindrical reducing joint 60 is connected to the outlet 31. However, the inlet 22 and / or outlet 31 may be shaped like a rectangular tube, and a rectangular drain pipe or the like may be connected. In this case, even if the central axis of the rectangular inlet 22 and / or outlet 31 coincides with the central axis of the upstream component 20 and / or downstream component 30, the posture of the indirect drain joint 10 with respect to the connected drain pipe is constrained. Therefore, by adjusting the relative angle between the upstream component 20 and the downstream component 30 and positioning the locking portion 39 in a position that facilitates release, the same effect as in the embodiment can be obtained.

[0051] In this embodiment, the upstream component 20 is provided with multiple inlet sections 22, and the downstream component 30 has only one outlet section 31. However, the number of inlet sections 22 may be set to one, and the number of outlet sections 31 may be multiple or eccentric. In this case, since the posture of the downstream component 30 is constrained, it is preferable to provide the upstream component 20 with a structure equivalent to a locking section 39.

[0052] In this embodiment, the opening 35 is provided above the outlet 31, but the structure corresponding to the opening 35 may be provided below the outlet 31, so that the wastewater overflowing from the outlet 31 is discharged from the lower opening 35.

[0053] In this embodiment, a reducing joint 60 is connected to the outlet section 31, and then connected to another drainpipe via the reducing joint. However, it is also possible to connect directly to another drainpipe without using a reducing joint. [Explanation of symbols]

[0054] Indirect drainage joint...10, Upstream component...20, Top plate...21, Inlet...22, Internal fitting...23, Step...24, Upper inner ring...25, Downstream component...30, Outlet...31, Lower flange...32, Lower inner ring...33, Flow path...34, Opening...35, Upper flange...36, External fitting...37, Protruding part...38, Locking part...39, Gap...40, Outer cylinder...41, Mesh body...50, Different diameter joint...60, Large diameter part...61, Reduced diameter part...62, Small diameter part...63, Drain pipe...70

Claims

1. An indirect drainage joint comprising: an internal space for forming a fluid channel through which a fluid can pass; an inlet located at the top through which drainage can flow into the channel-forming space from the outside; an outlet located at the bottom through which drainage can be discharged from the channel-forming space to the outside; and an opening for connecting the channel-forming space to the outside, wherein a drainage pipe can be connected to the inlet and outlet, The system comprises an upstream component having the inlet and a downstream component having the outlet. The opening is provided in at least one of the upstream component and the downstream component, and / or is formed when the upstream component and the downstream component are combined. One of the upstream component and the downstream component has an annular assembly portion, The other of the upstream component and the downstream component has a locking portion that can be locked to the assembly portion, The upstream component and the downstream component can be assembled by the relative proximity movement of the assembly portion and the locking portion, and the relative separation movement is suppressed by the locking portion being locked to the assembly portion. An indirect drainage joint in which, when the locking portion is locked to the assembly portion, the locking state between the assembly portion and the locking portion can be released at any position obtained by relatively rotating the upstream component and the downstream component with the center of the assembly portion as the axis of rotation.

2. One of the upstream component and the downstream component has a cylindrical outer fitting assembly portion. The other of the upstream component and the downstream component has a cylindrical internal assembly portion, One of the internal fitting portion and the external fitting portion is formed in an annular shape along the circumferential direction and has a stepped portion, which functions as the fitting portion. The other of the internal fitting portion or the external fitting portion has a locking portion provided in a part of the circumferential direction that can engage with the stepped portion, The indirect drainage joint according to claim 1, wherein the locking portion is displaceable from a position in which it is locked to the stepped portion to a retracted position in which it is not locked.

3. The indirect drainage joint according to claim 1, wherein at least one of the upstream component and the downstream component is capable of connecting a plurality of drainage pipes.

4. The locking portion is provided on the downstream component. The upstream component comprises a plurality of inlet sections, The inlet is located vertically above the outlet, and when the upstream component and the downstream component are rotated relative to each other, the inlet can maintain a position vertically above the outlet, as described in any one of claims 1 to 3.

5. An indirect drainage structure is provided in a drainage path, comprising an indirect drainage joint which has a fluid-passable flow channel forming space inside, a plurality of inlet ports located at the top that allow drainage to flow into the flow channel forming space from the outside, an outlet port located at the bottom that allows drainage to be discharged from the flow channel forming space to the outside, and an opening that connects the flow channel forming space to the outside, Each of the multiple inlets is connected to a drain pipe. An indirect drainage structure in which all of the multiple inlets are located vertically above the outlets.

6. The cross-sectional area of the outflow section is greater than the sum of the cross-sectional areas of the flow paths of the multiple drainage pipes connected to the inflow section. The indirect drainage structure according to claim 5, wherein one side of a cylindrical reducing joint, in which the inner diameter of one side is larger than the inner diameter of the other side, is connected to the outlet.