JP7122870B2 - Indirect drainage fitting - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indirect drainage joint that prevents waste water leaking from a drain pipe on the downstream side from flowing upstream and having an adverse effect.

Conventionally, it is adopted in a drainage path for discharging wastewater such as drain of equipment such as a water heater, and it is a problem that the wastewater flows backward from the drain pipe on the downstream side and adversely affects the equipment such as failure. Preventive indirect drainage structures are already well known (see, for example, Patent Documents 1 and 2).

JP 2011-162947 A JP 2016-211166 A

However, when the drainage discharged from the upstream side passes through the interior of the joint for indirect drainage, the drainage flows out from the water passage portion for indirect drainage to the outside along the inner peripheral surface of the joint for indirect drainage. I had a problem. In particular, when the pipe end of the upstream drain pipe has a pipe structure that is open sideways, this problem arises because it spirals down the inner circumference of the indirect drainage joint. is particularly conspicuous.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an indirect drainage joint that allows drainage to smoothly flow downstream.

The present invention is an indirect drainage joint for indirectly draining drainage flowing from an upstream drainage pipe toward a downstream drainage pipe, and is connected to a downstream pipe end of the upstream drainage pipe. , an introduction joint into which the waste water flowing from the upstream drainage pipe is introduced; and a downstream end of the introduction joint, so that the waste water introduced into the introduction joint flows downward from above. a main body joint portion having a drainage space inside, and a portion on one side of the side peripheral portion of the main body joint portion is provided with a communication for communicating the drainage space and the outside of the main body joint portion. A water portion is provided, and a water non-permeable portion that does not communicate between the drainage space and the outside of the main body joint portion is provided on the other side, and the water non-permeable portion is provided with the water non-permeable portion. The joint for indirect drainage is characterized by being provided with a drainage guide portion for guiding downward the drainage flowing through the joint.

By adopting such a configuration, it is possible to prevent the wastewater from scattering outside from the water-passing portion by guiding downward the wastewater passing through the non-water-passing portion.

Here, a configuration is proposed in which the drainage guide portion is a vertically protruded or recessed streak provided in the water non-permeable portion.

In such a configuration, when the water flowing out from the introduction joint flows down along the inner peripheral surface of the main body joint, the water flowing through the non-water-permeable portion is guided by the protrusion or the recess. The direction is guided downward. As a result, it is possible to smoothly flow down the drainage without scattering the drainage to the outside through the water passage.

Further, the drainage guide portion is a boundary portion between the water-permeable portion and the non-permeable portion, and is a convex barrier portion provided so as to protrude toward the axis line side of the main body joint portion. A configuration is proposed.

By adopting such a configuration, it is possible to prevent the waste water that normally flows along the water-non-conducting portion from scattering to the outside through the water-conducting portion.

Further, the pipe end of the upstream drain pipe is arranged along a direction intersecting the vertical direction, and the introduction joint portion is provided with a connection port to which the pipe end of the upstream drain pipe is connected. A structure is proposed in which the connection port opens in a direction along the pipe axis of the upstream drain pipe and is arranged on the side of the main body joint portion on which the water passage portion is arranged.

With such a configuration, since the non-water-conducting portion is provided in the direction in which the drainage discharged from the upstream drainage pipe in the normal drainage space is directed, the drainage passes through the water-conducting portion. It is possible to prevent scattering to the outside. In particular, when the pipe end of the upstream drainage pipe is arranged along the direction intersecting the vertical direction, the drainage in the drainage space spirally flows down the inner peripheral surface of the main body joint portion. Since the non-water-permeable portion is provided with a ridge portion or a groove portion along the vertical direction, it is possible to properly guide the drainage downward and smoothly flow down.

Further, the introduction joint portion is provided with a connection port to which a pipe end portion of the upstream drainage pipe is connected, and a drainage passage is formed in the connection port, and the downstream end of the drainage passage is provided. is provided with an outflow port that opens downward toward the drainage space along the vertical direction, and the opening edge of the outflow port in the introduction joint portion is provided with the drainage passage in the introduction joint portion. A configuration is proposed in which a drainage guide wall portion is formed which is continuous with the inner wall surface and guides the drainage flowing down along the inner wall surface of the drainage passage to the axial line side of the main body joint portion.

With such a configuration, the waste water flowing out from the outflow port is guided toward the axis line of the main body joint portion by the guiding action of the waste water guide wall portion, and the waste water is directly scattered to the outside through the water passage portion. is prevented.

INDUSTRIAL APPLICABILITY The joint for indirect drainage of the present invention has an excellent effect of allowing drainage to smoothly flow downward.

It is explanatory drawing which shows the piping connection structure in which the joint for indirect drainage which concerns on an Example is used. The joint for indirect drainage which concerns on an Example is shown, (a) is a perspective view, (b) is a front view. 2(a) is a plan view and (b) is a cross-sectional view taken along the line AA of FIG. 2(b). FIG. 2(a) is a cross-sectional view taken along line BB of FIG. 2(b), and (b) is a cross-sectional view along line CC of FIG. 2(b). FIG. FIG. 3(a) is an enlarged cross-sectional view taken along line DD of FIG. 3(a), particularly showing an introduction joint. FIG. 3(a) is an enlarged cross-sectional view taken along line EE of FIG. 3(a), particularly showing a check valve. 3B is a cross-sectional view taken along line FF of FIG. 3B; FIG. It is an expanded sectional view which shows a convex step part. FIG. 4 is an explanatory diagram showing an outline of the operation of the check valve, where (a) shows a fluid backflow prevention state and (b) shows a passage state; The outer cylindrical body which concerns on an Example is shown, (a) is a perspective view, (b) is a front view. Fig. 10(a) is a plan view and Fig. 10(b) is a sectional view taken along the line GG of Fig. 10(b). Fig. 10(a) is a sectional view taken along the line HH of Fig. 10(b); Fig. 11(b) is a sectional view taken along the line II of Fig. 11(a); ) is a sectional view taken along line JJ in FIG. 11(b). The inner cylindrical body which concerns on an Example is shown, (a) is a perspective view, (b) is a front view. 13(a) is a plan view, (b) is a bottom view, and (c) is a sectional view taken along line KK of FIG. 13(b). FIG. (a) is a cross-sectional view taken along line LL in FIG. 13(b), and (b) is a cross-sectional view taken along line MM in FIG. 14(a). The introduction joint part which concerns on an Example is shown, (a) is a perspective view, (b) is a front view. The introduction joint part which concerns on an Example is shown, (a) is a top view, (b) is a partially notched bottom view. 16(a) is a sectional view taken along line NN of FIG. 16(b), and (b) is a sectional view taken along line OO of FIG. 17(a). FIG. It is explanatory drawing which shows the state at the time of mounting|wearing a main-body joint part with an introduction joint part. It is explanatory drawing which shows the state which connected the main-body joint part to the drainage pipe part. FIG. 10 is an explanatory view showing a state in which the introduction joint is connected to the body joint and the introduction joint is in a separated state; Fig. 2 is a vertical cross-sectional view of the joint for indirect drainage according to the example, showing a case where the introduction joint is in a connected state; FIG. 4 is an explanatory diagram showing a state in which a check valve is being replaced;

An embodiment in which the joint for indirect drainage of the present invention is used in a drainage path for discharging drainage such as drain of a water heater will be described in detail. It should be noted that the present invention is not limited to the embodiments shown below, and design changes can be made as appropriate.

As shown in FIG. 1, the joint 1 for indirect drainage is arranged and used between a device 2 such as a water heater arranged on the upstream side and a main drainage pipe 8 arranged on the downstream side. Specifically, the indirect drainage joint 1 is connected to a plurality of upstream drainage pipe ends 5, 6, and 7 for discharging drainage such as drainage from the equipment 2 (hereinafter referred to as drainage). A downstream drain pipe section 10 is connected which communicates with a basin 9 connected to a drain main pipe 8 . The joint 1 for indirect drainage has a function of indirectly draining the drainage such as drain flowing from the upper stream toward the main drainage pipe 8 . The upstream drain pipe end portions 5, 6, 7 correspond to the pipe end portions of the upstream drain pipe, and the downstream drain pipe portion 10 corresponds to the downstream drain pipe. A pipe connection structure 11 is configured by the indirect drainage joint 1 , the upstream drainage pipe end portions 5 , 6 , 7 and the downstream drainage pipe portion 10 .

[Coupling for indirect drainage]
The structure of the indirect drainage joint 1 will be described below.

[Body joint part]
As shown in FIGS. 2 and 3, the indirect drainage joint 1 has a cylindrical body joint portion 15 whose axial direction is substantially vertical.

Further, as shown in FIG. 3B and the like, the main body joint portion 15 includes a cylindrical outer cylinder portion 30 and a cylindrical inner cylinder portion 50 housed inside the outer cylinder portion 30 .

In addition, a drainage space 16 is formed in the body joint portion 15 so that drainage flows down from above, and an upper opening 17 communicating with the drainage space 16 is formed at the upper end of the body joint portion 15 . A lower opening 18 communicating with the drainage space 16 is formed at the lower end.

Further, as shown in FIG. 2 and the like, a lid-shaped introduction joint portion 60 configured by a separate member from the main body joint portion 15 is attached to the upper opening portion 17 of the main body joint portion 15 . Note that, as shown in FIG. 1, the upstream drain pipe end portions 5, 6, and 7 are connected to the introduction joint portion 60. As shown in FIG.

On the other hand, the upstream end of the downstream drainage pipe portion 10 is connected to the lower opening portion 18 of the main body joint portion 15 as shown in FIGS. 1 and 2a.

Further, the body joint portion 15 includes an outer water passage portion 32 that communicates the outside of the body joint portion 15 with the drainage space 16 . Specifically, the outer water passage portion 32 is configured by a large number of through holes.

Further, in the drainage space 16 of the main body joint portion 15, a check valve 20, which is a means for preventing reverse flow of fluid, is arranged as shown in FIG. 3b. The check valve 20 has the function of allowing drainage such as drain to flow downstream in the joint 1 for indirect drainage and preventing the drainage of the drainage main pipe 8 from flowing backward in the upstream direction. .

More specifically, the check valve 20 has an elastically deformable valve structure that allows drainage such as drain to flow through the inside thereof, and that has a diameter that decreases toward the bottom. As shown in FIG. 3B, the discharge port 22 formed at the lower end is normally closed by a pair of flat plate-shaped rims 23, 23 facing each other in close contact with each other. . Then, in the normal state where drainage such as drain does not flow in the state where the construction as shown in FIG. 1 is completed, as shown in FIG. becomes a closed fluid backflow blocking state α. In this state, the fluid (wastewater or gas) in the main drain pipe 8 is prevented from flowing out upstream of the check valve 20 . Therefore, the fluid does not leak into the device 2 and damage the device.

On the other hand, when drainage such as drainage flows out from the device 2 and a predetermined amount of drainage such as drainage accumulates in the check valve 20, the check valve 20 elastically deforms due to the weight of the drainage, etc., as shown in FIG. 9b. The rim portions 23, 23 are separated from each other, and the passage state β is obtained in which the discharge port 22 is open. In such a state, waste water such as drain in the check valve 20 is appropriately discharged to the downstream side. When the waste water such as drain accumulated in the check valve 20 is properly discharged, the check valve 20 returns to its original shape and enters the fluid backflow prevention state α again.

Even if wastewater flows back from the downstream drainage pipe portion 10 to the joint 1 for indirect drainage, such backflow water can flow out from the space 16 for drainage to the outside through the outer water passage portion 32, so that the indirect drainage The structure is well constructed.

Next, the outer cylinder portion 30 of the main body joint portion 15 will be described.

As shown in FIG. 10 and the like, an outflow side connecting portion 31 is formed at the downstream end (lower end) of the outer cylindrical portion 30 . The outflow-side connecting portion 31 is connected to a downstream drain pipe end portion 10 a formed at the upstream end of the downstream drain pipe portion 10 .

Further, the above-described outer water passage portion 32 is provided at a predetermined portion (one side portion) of the side peripheral portion of the outer cylindrical portion 30 . The outer water communicating portion 32 is composed of a plurality of through holes arranged vertically and horizontally, and the lower end of the outer water communicating portion 32 corresponds to the position of the lowest through hole. A water flow area with a predetermined height is secured by

In addition, a check valve extracting outer opening 33 (fluid backflow preventing means extracting outer opening 33) is provided at a portion (other side portion) of the side peripheral portion of the outer cylindrical portion 30 opposite to the outer water communicating portion 32. part) is provided. This check valve extraction outer opening 33 is an opening for replacing the check valve 20 described above, and has a size that allows the check valve 20 to pass through.

In addition, as shown in FIG. 11b, on the inner peripheral surface of the outer cylinder portion 30 below the outer water passage portion 32 and the check valve extracting outer opening portion 33, a A protruding stepped portion 34, which is a portion of the cylindrical wall having a thick wall, is formed around the axis. Further, as shown in FIG. 11a, the upper surface of the protruding stepped portion 34 is provided with a guide protruding portion 35 protruding upward. In addition, as shown in FIG. 12B, the guide protrusion 35 is formed so as to be continuous with the tapered inner peripheral surface of the outer cylindrical portion 30, the diameter of which is slightly reduced inward.

Further, as shown in FIG. 6, a well-known bayonet mechanism 25 is provided below the convex stepped portion 34, and the check valve 20 can be detachably connected thereto.

Further, as shown in FIG. 10 and the like, on the outer peripheral surface of the upstream end (upper end) of the outer cylindrical portion 30, connection pieces 36 and 37 consisting of plate pieces protruding horizontally are provided. They are arranged as a pair of top and bottom. The connection piece portions 36 and 37 are provided on the same side as the outer water passage portion 32 and have a flange structure that extends horizontally from the outer peripheral surface of the outer cylindrical portion 30 . Also, the connecting piece portions 36 and 37 arranged vertically are connected to each other by a pair of left and right reinforcing bridge portions 38 and 38 .

A pair of right and left engaging stepped portions 41, 41 projecting upward are formed on the upper surface of the upper connecting piece portion 36. As shown in FIG. A pair of locked piece portions 72, 72 provided on an introduction joint portion 60, which will be described later, are locked to the locking stepped portions 41, 41. As shown in FIG.

Further, as shown in FIG. 10a, the upstream end (upper end) of the outer cylindrical portion 30 and the side opposite to the side where the outer water passage portion 32 is located (the outer opening 33 for taking out the check valve is On the arranged side), an introduction joint part passage outer groove 45 is formed by notching downward.

Next, the inner cylindrical portion 50 will be described.

As shown in FIG. 13 and the like, the inner tubular portion 50 is formed of a tubular member having an outer diameter slightly smaller than the inner diameter of the outer tubular portion 30 . With the inner cylinder portion 50 inserted in the outer cylinder portion 30, the lower end of the inner cylinder portion 50 is placed on the protruding stepped portion 34 of the outer cylinder portion 30 and supported from below.

In addition, regarding the height dimension of the inner cylinder portion 50, the upper end of the inner cylinder portion 50 and the upper end of the outer cylinder portion 30 are substantially at the same height when the inner cylinder portion 50 is accommodated in the outer cylinder portion 30. dimensioned. In addition, in a state in which the inner cylinder portion 50 is arranged inside the outer cylinder portion 30 , the inner cylinder portion 50 is coaxially rotatable with respect to the outer cylinder portion 30 .

In addition, a check valve extracting inner opening 51 that can communicate with the check valve extracting outer opening 33 is formed at a predetermined portion (one side portion) of the side peripheral portion of the inner tubular portion 50 . there is The check valve extracting inner opening 51 is an opening for exchanging the check valve 20, like the check valve extracting outer opening 33 described above, through which the check valve 20 can pass. It has dimensions.

In addition, a non-water-permeable portion 52 having no portion communicating between the inside and the outside is formed in a portion (other side portion) of the side peripheral portion of the inner cylindrical portion 50 opposite to the check valve extracting inner opening portion 51 . It is In addition, a plurality (five pieces) of vertically elongated rib-shaped ridges 53 extending in the vertical direction are provided on the inner peripheral surface side of the non-water-permeable portion 52 at intervals in the circumferential direction. As shown in FIGS. 4 and 14, the protruding streak portion 53 protrudes inside the inner cylindrical portion 50 .

Further, as shown in FIGS. 14a, 14c, etc., the inner peripheral surface of the inner cylindrical portion 50 and the boundary portion between the check valve extracting inner opening portion 51 and the water non-conducting portion 52 are provided with a main body joint portion. A pair of convex barrier portions 54, 54 projecting toward the axis side of 15 (that is, the axis side of the inner cylindrical portion 50) are formed along the vertical direction.

Further, as shown in FIGS. 8 and 15, the lower end portion of the inner peripheral surface of the inner tubular portion 50 is provided with a downwardly inclined portion 55 downwardly inclined toward the inside. As shown in FIG. 8, when the inner cylinder portion 50 is accommodated in the outer cylinder portion 30, the lower end of the downward inclined portion 55 corresponding to the inner peripheral edge of the lower end portion of the inner cylinder portion 50 is positioned at the outer cylinder portion. It is located closer to the axis of the inner cylindrical portion 50 than the inner peripheral edge of the convex stepped portion 34 of 30 . However, the position where the bayonet mechanism 25 has a projection is excluded.

Further, as shown in FIGS. 13 and 14b, a concave guide groove 56 into which the guide protrusion 35 of the outer cylinder 30 is inserted is formed on the outer peripheral surface of the inner cylinder 50 at the lower end of the inner cylinder 50. It is formed in an arc shape along the With such a configuration, when the inner cylindrical portion 50 rotates within the outer cylindrical portion 30 , the guide projecting portion 35 relatively moves within the guide groove portion 56 , and the guide projecting portion 35 moves toward one side of the guide groove portion 56 . When it abuts against the end of the groove, the check valve extracting outer opening 33 and the check valve extracting inner opening 51 communicate with each other in an open state γ, which will be described later (see FIG. 21). On the other hand, when the guide projecting portion 35 comes into contact with the groove end on the other side of the guide groove portion 56, the outer water passing portion 32 is in the use state δ in which it is blocked (see FIGS. 7, 22, etc.).

Further, as shown in FIG. 13, the upstream end (upper end) of the inner cylindrical portion 50 and the side opposite to the non-water-permeable portion 52 (the inner opening 51 for extracting the check valve is On the arranged side), an inner recessed groove 57 for passage of the introduction joint section is formed by notching downward.

Furthermore, as shown in FIGS. 13a and 14c, on the outer peripheral surface of the non-water-permeable portion 52 of the inner cylindrical portion 50, concave groove-like finger hooking recesses 58 having a vertical direction as a longitudinal direction are spaced apart in the circumferential direction. A plurality of (five) are formed. The finger hook recess 58 is formed at a portion corresponding to the protrusion 53 described above.

[Introduction joint part]
Next, the introduction joint portion 60 will be described.

The introduction joint part 60 has a lid shape as shown in FIG. . Specifically, the pipe end connection ports 61, 62, 63 are adjacent to each other and juxtaposed in the lateral direction (substantially horizontally) and open laterally. The pipe end connection ports 61, 62, and 63 are individually connected to the upstream drain pipe ends 5, 6, and 7, and the pipe end connection ports 61, 62, and 63 provide A connection port according to the present invention is constructed.

Further, as shown in FIGS. 17 and 18, drain passages 61a, 62a, and 63a are individually formed in the introduction joint portion 60 for each of the pipe end connection ports 61, 62, and 63. Passages 61a, 62a, 63a are arranged side by side in the left-right direction.

Furthermore, as shown in FIGS. 17 and 18a, at the downstream ends of the drain passages 61a, 62a, 63a juxtaposed in the left-right direction, outlets 61b, 62b, which are independently opened downward along the vertical direction, are provided. , 63b are provided. More specifically, the central outflow port 62b has a substantially triangular shape with the wall on the side of the tube end connection port 62 as the base. Outlets 61b, 63b are adjacent on both sides. By adopting such a configuration, the drainage flowing through each of the drainage passages 61a, 62a, 63a from the pipe end connection ports 61, 62, 63 to the outflow ports 61b, 62b, 63b of the drainage passages 61a, 62a, 63a is separated from each other. It is prevented that the water is mixed with the drain passages 61a, 62a, 63a and flows back to the equipment 2 side.

Further, as shown in FIG. 18 and the like, a convex first guide transmission portion 65 protrudes vertically downward from the wall surface portion on the tube end connection port 62 side facing the central outflow port 62b. On the other hand, a convex-shaped second guide transmission part 66 protrudes vertically downward from the wall surface on the side opposite to the first guide transmission part 65 facing the outflow ports 61b, 62b, 63b. Here, the first guidance transmission part 65 and the second guidance transmission part 66 prevent the waste water introduced into the introduction joint part 60 from backflowing along the wall surface part of the introduction joint part 60 to another drainage passage or the like. It has a function to prevent Therefore, the waste water discharged from the introduction joint portion 60 is guided so as to appropriately flow down to the space for waste water 16 below.

In addition, as shown in FIG. 17b, out of the outflow ports 61b, 62b, 63b arranged side by side in the horizontal direction, at the downstream end side of the drainage passage 61a located on the outer side, the waste water is guided toward the outflow port 61b. A drainage guide first wall portion 61c is erected in the vertical direction. Furthermore, at the opening edge of the outflow port 61b, a curved drainage guide second wall portion (drainage guide wall portion ) 61d are erected in the vertical direction. That is, the drainage guiding first wall portion 61c smoothly guides the drainage along the outer wall surface in the drainage passage 61a to the outflow port 61b side. By providing the drainage guide second wall portion 61d that is continuous with the drainage guide first wall portion 61c, the drainage that flows out from the outflow port 61b is directed to the outside of the main body joint portion 15 on the side of the water non-conducting portion 52. It is guided toward the side farther from the water part 32 . This prevents the waste water from splashing directly to the outside from the outer water passage portion 32 . This structure is also applied to the drain passage 63a and the outlet 63b located on the opposite side, and the structure is symmetrical, so the description is omitted.

Further, as shown in FIG. 16 , on the outer peripheral portion of the introduction joint portion 60 , a plate piece-like joint connection guide portion 71 protruding downward is formed in the outer peripheral shape (substantially U-shaped) of the introduction joint portion 60 . formed along. Furthermore, as shown in FIG. 17B and the like, a pair of locked pieces formed of inner wall surfaces that are thickened inward are provided at both ends of the joint portion connection guide portion 71 on the pipe end connection port 62 side. Portions 72, 72 are provided.

At both end portions of the joint portion connection guide portion 71 , stepped guide protrusions 74 are provided below the engaged piece portions 72 with a gap therebetween. A gap between the locked piece portion 72 and the guide projection portion 74 serves as a guide groove portion 73 .

[Sliding structure]
The introduction joint portion 60 described above is attached to the main body joint portion 15 in the following procedure.
As shown in FIG. 19, the introduction joint portion 60 is arranged so that the check valve extraction outer opening 33 of the body joint portion 15 and the pipe end connection ports 61, 62, 63 face each other. Further, the rotational position of the inner cylinder portion 50 is set to a position where the check valve extraction inner opening portion 51 and the check valve extraction outer opening portion 33 of the outer cylinder portion 30 communicate with each other, and the introduction joint of the outer cylinder portion 30 is set. The outer recessed groove 45 for passage and the inner recessed groove 57 for passage of the introduction joint portion of the inner cylindrical portion 50 are kept in communication with each other. Then, the introduction joint portion 60 is brought closer to the main body joint portion 15 in the horizontal direction and assembled so that the locked pieces 72, 72 of the introduction joint portion 60 come into contact with the upper connection piece portion 36. . Then, in this assembling process, the outer edge of the connecting piece 36 of the main body joint 15 is fitted into the guide groove 73 of the introduction joint 60, and the guide projection 74 of the introduction joint 60 is aligned with the upper and lower pair of connecting pieces. It fits into the gap between the pieces 36,37. Then, the introduction joint portion 60 becomes slidable with respect to the main body joint portion 15 while the joint portion connection guide portion 71 of the introduction joint portion 60 is guided by the outer edge of the connecting piece portion 36 . Then, as shown in FIGS. 4B and 5, when the locked piece portion 72 of the introduction joint portion 60 climbs over the locking stepped portion 41 and the introduction joint portion 60 is temporarily fixed to the main body joint portion 15, the introduction joint The portion 60 is attached to the main body joint portion 15 . In this attached state, the guide protrusion 74 of the introduction joint portion 60 is fitted between the upper and lower connection piece portions 36 and 37 of the main body joint portion 15, so that the introduction joint portion 60 is attached to the main body joint portion 15. On the other hand, it becomes a structure that is difficult to detach upward.

When the assembled state is obtained by the above-described procedure, the body joint portion 15 is connected to the downstream end of the introduction joint portion 60, and the waste water introduced into the introduction joint portion 60, for example, flows through the outflow ports 61b, 62b, and 63b. It flows out to the space 16 for drainage through.

By the way, in the process of attaching the introduction joint part 60 to the main body joint part 15 while sliding it, the first guide transmission part 65 and the second guidance transmission part 66 of the introduction joint part 60 communicate with each other at the main body joint part 15 . It passes through the recessed groove portion formed by the outer recessed groove 45 for introduction joint passage and the inner recessed groove 57 for introduction joint passage. Therefore, the first guide transmission portion 65 and the second guide transmission portion 66 do not impede the sliding motion of the introduction joint portion 60 at the time of mounting.

It should be noted that by performing the above-described assembling procedure in reverse order, the introduction joint portion 60 in the temporarily fixed state can be slid in the opposite direction with respect to the main body joint portion 15 and properly separated.

[Pipe connection method]
Next, a pipe connection method using the joint 1 for indirect drainage described above will be described.

In order to construct the pipe connection structure 11 using the joint 1 for indirect drainage described above, first, as shown in FIG. The outflow side connection portion 31 of the main body joint portion 15 is connected to the pipe end portion 10a. At this time, the outer cylindrical portion 30 of the main body joint portion 15 is arranged so that the outer water passage portion 32 faces toward the upstream drain pipe end portions 5, 6 and 7 of the preceding piping. In FIG. 20, only the central upstream drain pipe end 6 is shown in cross section, and the illustration of the other upstream drain pipe ends 5 and 7 is omitted to simplify the explanation.

Here, the rotational position of the inner cylindrical portion 50 is the open state γ in which the check valve extracting inner opening portion 51 and the check valve extracting outer opening portion 33 of the outer cylindrical portion 30 communicate with each other. Then, the outer groove 45 for passage of the introduction joint part of the outer cylinder part 30 and the inner groove 57 for passage of the introduction joint part of the inner cylinder part 50 are brought into communication with each other.

In this state, the introduction joint portion 60 is attached to the main body joint portion 15 as shown in FIG. Here, in the initial position before the introduction joint 60 is slid, the pipe end connection ports 61, 62, 63 of the introduction joint 60 are separated from the upstream drain pipe ends 5, 6, 7 in a separated state ε becomes. Then, in the separated state ε, the pipe ends of the upstream drain pipe ends 5, 6, 7 are cut to appropriate lengths.

Then, the introduction joint part 60 in the initial position is slid in a direction approaching the upstream drain pipe ends 5, 6, 7, so that the pipe end connection ports 61, 62, 63 of the introduction joint part 60 and the upstream drainage pipe are connected. Assume that the pipe ends 5, 6, and 7 are in a connected state ζ (see FIG. 23). In addition, since the introduction joint portion 60 slides in the direction along the pipe axis of the upstream drain pipe end portions 5, 6, 7, the connected state ζ can be reliably obtained.

After that, as shown in FIG. 22, the inner tubular portion 50 is rotated with respect to the outer tubular portion 30 to establish a use state δ in which the outer water passage portion 32 and the check valve extracting inner opening portion 51 communicate with each other. completes the piping connection work.

Thus, even if the upstream drain pipe end portions 5, 6, 7 and the downstream drain pipe portion 10, which are pre-piped, are in a state of hell piping, pipe connection can be easily performed using the joint 1 for indirect drainage. be able to.

By the way, as shown in FIG. 23, if the check valve 20 fails due to aged deterioration or the like, only the check valve 20 of the indirect drainage joint 1 can be replaced. Specifically, when the inner cylindrical portion 50 is rotated with respect to the outer cylindrical portion 30 to be in the open state γ, the check valve 20 in the joint for indirect drainage 1 is moved to the outer opening 33 for extracting the check valve. and the inner opening 51 for extracting the check valve, and a new check valve 20 can be attached. Further, when the inner cylindrical portion 50 is rotated with respect to the outer cylindrical portion 30 and the guide projection portion 35 is brought into contact with the groove end on the other side of the guide groove portion 56, the outer water passage portion 32 and the inner opening for taking out the check valve are opened. The state of use .delta.

[Advantages of joint 1 for indirect drainage]
The advantages of the indirect drainage coupling 1 are listed below in order.

The introduction joint part 60 is slidable along the pipe axial direction of the pipe ends of the upstream drain pipe ends 5, 6, 7 with respect to the body joint part 15 connected to the downstream drain pipe part 10. Therefore, the introduction joint part 60 is separated from the pipe ends of the upstream drain pipe ends 5, 6, 7, and the separated state ε can be changed to a connected state ζ connected to . Therefore, it is not necessary to shift the positions of the upstream drain pipe end portions 5, 6, 7, etc. even in the state of hell piping, so that the indirect drainage joint 1 can be appropriately and easily applied.

Even in a usage environment where there are a plurality of upstream drain pipe ends 5, 6, 7, since a plurality of pipe end connection ports 61, 62, 63 are provided in the introduction joint part 60, a plurality of drains, etc. can be treated collectively.

When the inner cylinder portion 50 of the main body joint portion 15 is rotated with respect to the outer cylinder portion 30 and the outer water passage portion 32 and the check valve extracting inner opening portion 51 are in communication with each other, the used state δ is established. Even if it flows well into the drainage space 16, this drainage hits the water non-conducting portion 52 and properly flows down. Therefore, the drainage that has flowed into the drainage space 16 does not directly scatter to the outside via the outer water passage portion 32 .

On the wall surface facing the outflow ports 61b, 62b, 63b of the introduction joint part 60, there are a first guide-transmitting part 65 and a second guide-transmitting part 66 having a convex shape for transmitting and guiding the drained water to the drain space 16. protruded vertically downwards. Therefore, it is possible to change the direction and guide the drainage introduced along the direction intersecting the vertical direction to the drainage space 16 appropriately.

Drainage passages 61a, 62a, 63a are individually formed for each of the pipe end connection ports 61, 62, 63 provided in the introduction joint portion 60. At the downstream ends of the drainage passages 61a, 62a, 63a, along the vertical direction Outflow ports 61b, 62b, and 63b are provided that are independently opened downward. Therefore, even when a large amount of waste water is introduced into the introduction joint portion 60, the waste water flowing through one of the drainage passages 61a, 62a, 63a flows back into the other drainage passages 61a, 62a, 63a. can be prevented.

The drainage guide first wall portion 61c can smoothly guide the drainage in the drainage passage 61a to the outflow port 61b side. Further, the drainage guide second wall portion 61d, which is continuous with the drainage guide first wall portion 61c, guides the drainage flowing out of the outflow port 61b toward the axis line of the main body joint portion 15, thereby separating from the outer water passage portion 32, In addition, it is possible to discharge the waste water at a position close to the water non-conducting portion 52, thereby preventing the waste water from scattering directly to the outside.

Since the non-water-permeable portion 52 is provided with a ridge portion 53 extending in the vertical direction, normally, the drainage flowing along the non-water-permeable portion 52 is smoothly guided downward along the ridge portion 53. flow down It should be noted that the ridges 53 do not need to be strictly along the vertical direction, and may be substantially along the vertical direction to the extent that the action of guiding the drainage downward can be obtained.

In particular, in the configuration in which the upstream drain pipe ends 5, 6, and 7 are laterally connected to the introduction joint portion 60, when the wastewater flows vigorously from the introduction joint portion 60 into the main body joint portion 15, the wastewater flows into the main body. Where wastewater tends to spirally flow down the inner peripheral surface of the joint portion 15 , the ridges 53 can favorably flow downward.

At the boundary between the inner opening 51 for taking out the check valve and the water non-conducting portion 52 of the inner cylindrical portion 50, convex barrier portions 54, 54 protruding toward the axis line side of the main body joint portion 15 extend in the vertical direction. formed along the Therefore, the barrier portions 54, 54 are positioned at the boundary between the outer water-permeable portion 32 and the non-water-permeable portion 52 in the state of use δ, and the drainage flowing along the non-permeable portion 52 passes through the outer water-permeable portion 32. It is possible to prevent scattering to the outside through.

By rotating the inner cylindrical portion 50 with respect to the outer cylindrical portion 30, the state can be freely changed between the open state γ and the use state δ. Therefore, maintenance such as replacement of the check valve 20 and cleaning of the drainage space 16 is facilitated.

Since the lower end of the inner cylindrical portion 50 is supported from below by the convex stepped portion 34 formed on the inner peripheral surface of the outer cylindrical portion 30, the structure is simplified and the manufacturing cost can be kept low.

In addition, a downwardly inclined portion 55 that is downwardly inclined toward the inside is provided at the lower end portion of the inner peripheral surface of the inner cylinder portion 50 , and the lower end of the downwardly inclined portion 55 is aligned with the convex stepped portion 34 of the outer cylinder portion 30 . is positioned closer to the axis of the inner cylindrical portion 50 than the tip of the inner cylindrical portion 50 . Therefore, it is possible to prevent the water flowing along the inner peripheral surface of the inner cylinder portion 50 from leaking through the gap between the inner cylinder portion 50 and the outer cylinder portion 30, and for example, an auxiliary member such as an O-ring is unnecessary.

A guide projection 35 is provided on the outer cylinder 30 , and a guide groove 56 into which the guide projection 35 is inserted is formed on the inner cylinder 50 . Then, when the inner cylindrical portion 50 is rotated with respect to the outer cylindrical portion 30, when the guide projecting portion 35 comes into contact with the groove end on one side of the guide groove portion 56, the open state .gamma. When the guide protrusion 35 comes into contact with the groove end of , the state of use δ is reached. Therefore, it is possible to prevent the inner tubular portion 50 from rotating unintentionally due to the momentum of the water draining spirally along the inner peripheral surface of the inner tubular portion 50 . In addition, since the rotation range of the inner tubular portion 50 is restricted, the operation of rotating the inner tubular portion 50 during maintenance is simplified.

Further, since the recessed portion 58 for hooking a finger is formed on the outer peripheral surface of the inner cylinder portion 50, the rotation operation of the inner cylinder portion 50 is facilitated.

[Main part of the present invention]
Below, the main part of this invention is described again.

Since the non-water-permeable portion 52 is provided with a ridge portion 53 along the vertical direction, normally, the drainage flowing along the water-non-permeable portion 52 is smoothly guided downward and flows down.

When the inner cylinder portion 50 of the main body joint portion 15 is rotated with respect to the outer cylinder portion 30 and the outer water passage portion 32 and the check valve extracting inner opening portion 51 are in communication with each other, the used state δ is established. Even if it flows well into the drainage space 16, this drainage hits the water non-conducting portion 52 and properly flows down. Therefore, the drainage that has flowed into the drainage space 16 does not directly scatter to the outside via the outer water passage portion 32 .

At the boundary between the inner opening 51 for taking out the check valve and the water non-conducting portion 52 of the inner cylindrical portion 50, convex barrier portions 54, 54 protruding toward the axis line side of the main body joint portion 15 extend in the vertical direction. formed along the Therefore, the barrier portions 54, 54 are positioned at the boundary between the outer water-permeable portion 32 and the non-water-permeable portion 52 in the state of use δ, and the drainage flowing along the non-permeable portion 52 passes through the outer water-permeable portion 32. It is possible to prevent scattering to the outside through.

The drainage guide first wall portion 61c smoothly guides the drainage in the drainage passage 61a to the outflow port 61b side. Further, the drainage flowing out of the outflow port 61b is guided toward the axis line of the main body joint portion 15 by the drainage guide second wall portion 61d that is continuous with the drainage guide first wall portion 61c, thereby separating it from the outer water passage portion 32. Moreover, since the waste water is discharged at a position close to the water non-conducting portion 52, direct splashing of the waste water to the outside is prevented.

In the above embodiments, the dimensions and shape of each part can be freely selected. The height of the outer water passage portion 32 is desirably 50 mm or more in order to reliably realize indirect drainage.

Further, the number of pipe end connection ports 61, 62, 63 is not limited to three, and may be four or more, two or one.

The pipe ends of the upstream drain pipe ends 5, 6, 7 do not need to be along the horizontal direction, but may be in a direction intersecting the vertical direction. Also, the sliding direction of the introduction joint portion 60 can be appropriately determined corresponding to this. However, considering ease of construction, it is desirable that the pipe ends of the upstream drain pipe ends 5, 6, 7 are horizontal.

Moreover, it is sufficient that the separated state ε and connected state ζ are appropriately obtained within the slidable range of the introduction joint portion 60 , and it is not necessary to be in the separated state ε or connected state ζ at the limit position of the slidable range.

The first guide-transmitting part 65 and the second guide-transmitting part 66 may be formed separately or may be formed to project vertically downward so as to surround the outlets 61b, 62b, 63b.

The protruding line portion 53 provided in the non-water-permeable portion 52 may be a recessed line portion formed by being recessed into a recessed line instead of a protruding line.

As the check valve 20 as the fluid backflow prevention means, a backflow prevention means configured by other known technology may be used.

When connecting the upstream drainage pipe end portions 5, 6, 7 and the downstream drainage pipe portion 10 to the indirect drainage joint 1, an adhesive, a sealing tape, or the like may be used.

Further, the body joint portion 15 does not have to employ a double structure composed of the outer cylinder portion 30 and the inner cylinder portion 50 .

In addition, the indirect drainage joint 1 may be used not only for indirectly draining drain water but also for indirectly draining rainwater.

In addition, the indirect drainage joint 1 described so far has a configuration in which the introduction joint portion 60 is slidable relative to the main body joint portion 15 in order to ensure ease of construction, but the present invention is limited to this. Instead, for example, the introduction joint portion 60 may be fixed in advance to the main body joint portion 15 so as not to slide, or the introduction joint portion 60 and the main body joint portion 15 may be integrated. Of course it's fine.

1 Indirect drainage joints 5, 6, 7 Upstream drain pipe end (pipe end of upstream drain pipe)
10 drainage pipe section (downstream drainage pipe)
11 Piping connection structure 15 Body joint part 16 Drainage space 32 Outer water passage part (water passage part)
34 Convex stepped portion 52 Water impermeable portion 53 Convex streak portion (drainage guide portion)
54 barrier part (drainage guide part)
55 downward inclined portion 58 recessed portion for finger hanging 60 introduction joint portion 61, 62, 63 pipe end connection port (connection port)
61a, 62a, 63a drainage passages 61b, 62b, 63b outlet 61d drainage guide second wall portion (drainage guide wall portion)
65 first guidance transmission section (guidance transmission section)
66 second guidance transmission section (guidance transmission section)
ε Separated state ζ Connected state

Claims (5)

An indirect drainage joint for indirectly draining drainage flowing from an upstream drainage pipe toward a downstream drainage pipe,
an introduction joint connected to a downstream pipe end of the upstream drainage pipe and into which waste water flowing from the upstream drainage pipe is introduced;
a body joint portion connected to the downstream end of the introduction joint portion and having therein a drainage space in which the waste water introduced into the introduction joint portion flows down from above;
and
A water passage portion communicating between the drainage space and the outside of the main body joint portion is provided on one side of the side peripheral portion of the main body joint portion, and the drainage space is provided on the other side portion. and the outside of the main body joint part are not communicated, and a water non-conducting part is provided through which the drainage introduced into the introduction joint part is transmitted ,
The joint for indirect drainage, wherein the non-permeable portion is provided with a drainage guide portion for guiding downward the drainage flowing through the non-permeable portion. 2. The joint for indirect drainage according to claim 1, wherein the drainage guide portion is a vertically protruded or recessed portion provided in the non-permeable portion. The drainage guide portion is a boundary portion between the water-permeable portion and the non-permeable portion, and is a convex barrier portion provided so as to protrude toward the axis line side of the main body joint portion. 2. The joint for indirect drainage according to 1. The pipe end of the upstream drainage pipe is arranged along a direction intersecting the vertical direction,
The introduction joint portion is provided with a connection port to which a pipe end portion of the upstream drainage pipe is connected,
4. The connection port according to any one of claims 1 to 3, wherein the connection port opens in a direction along the pipe axis of the upstream drain pipe and is arranged on the side of the main body joint portion on which the water passage portion is arranged. Fitting for indirect drainage as described. The introduction joint portion is provided with a connection port to which the pipe end of the upstream drainage pipe is connected, and a drainage passage is formed in the connection port, and the downstream end of the drainage passage is , an outlet opening downward toward the drainage space is provided along the vertical direction,
The opening edge of the outflow port in the introduction joint portion is continuous with the inner wall surface of the drainage passage in the introduction joint portion, and drains water flowing down along the inner wall surface of the drainage passage. 5. The joint for indirect drainage according to any one of claims 1 to 4, further comprising a drainage guide wall portion that guides to the side.

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