JP6947691B2 - Indirect drainage fitting - Google Patents

Description

The present invention relates to an indirect drainage joint that prevents drainage leaking from a drainage pipe on the downstream side from flowing to the upstream side and having an adverse effect.

Conventionally, it has been adopted as a drainage route for draining drainage of equipment such as a water heater, and the drainage flows back from the drainage pipe on the downstream side, which adversely affects the equipment. The indirect drainage structure to prevent is already well known (see, for example, Patent Documents 1 and 2).

In addition, a configuration is proposed in which a backflow prevention means is provided in the joint for indirect drainage to indirect drainage.

Japanese Unexamined Patent Publication No. 2011-162947 Japanese Unexamined Patent Publication No. 2016-21166

However, when the backflow prevention means is built in, maintenance work of the backflow prevention means is required regularly or irregularly, and a configuration that can perform the maintenance work more efficiently and easily is required.

An object of the present invention is to provide an indirect drainage joint that can be maintained more efficiently and easily.

The present invention is an indirect drainage joint for indirectly draining the drainage flowing from the upstream drainage pipe toward the downstream drainage pipe, and is connected to a pipe end portion on the downstream side of the upstream drainage pipe. , The introduction joint portion into which the drainage flowing from the upstream drainage pipe is introduced and the downstream end portion of the introduction joint portion are connected, and the drainage introduced into the introduction joint portion flows down from the top to the bottom. A main body joint portion having a drainage space inside is provided, and a fluid backflow prevention means is arranged at a predetermined position in the drainage space of the main body joint portion. An outer cylinder portion arranged coaxially with the main body joint portion and an inner cylinder portion arranged inside the outer cylinder portion and rotatable coaxially with the outer cylinder portion are provided. A water passage portion that communicates the drainage space with the outside of the main body joint portion is provided on one side of the peripheral wall portion of the outer cylinder portion, and the fluid backflow prevention means is provided on the other side portion. An outer opening for taking out the fluid backflow prevention means having a size that allows the fluid backflow prevention means to pass through is provided, and an inner side for taking out the fluid backflow prevention means having a size that allows the fluid backflow prevention means to pass through the peripheral wall portion of the inner cylinder portion. An opening is provided, and the inner cylinder portion rotates with respect to the outer cylinder portion so that the outer opening for taking out the fluid backflow preventing means and the inner opening for taking out the fluid backflow preventing means communicate with each other. It is an indirect drainage joint characterized in that the state can be freely changed into each state of the open state and the used state in which the water passage portion and the inner opening for taking out the fluid backflow preventing means are communicated with each other. ..

In such a configuration, the fluid backflow preventing means can be easily replaced by rotating the inner cylinder portion to bring it into the open state. In addition, it is possible to preferably prevent the wastewater from scattering to the outside by setting the used state in the normal state.

Further, the lower end of the inner cylinder portion is supported by a convex step portion formed on the inner peripheral surface of the outer cylinder portion, and the lower end portion of the inner peripheral surface of the inner cylinder portion is directed inward. A configuration is proposed in which a downwardly inclined portion is provided and the lower end of the downwardly inclined portion is located closer to the axis of the inner cylinder portion than the tip of the convex step portion.

Here, normally, if the two-member structure is composed of the outer cylinder portion and the inner cylinder portion, water leakage is likely to occur from the gap between the outer cylinder portion and the inner cylinder portion. It becomes difficult for drainage to enter the gap between the outer cylinder portion and the inner cylinder portion. Therefore, the indirect drainage joint does not require an O-ring or the like, the number of parts is reduced, and the manufacturing cost is reduced.

Further, one of the outer cylinder portion and the inner cylinder portion is provided with a guide protruding portion protruding toward the other, and the outer cylinder portion and the inner cylinder portion are provided on the other. When the guide groove portion into which the guide protrusion portion is inserted is formed and the inner cylinder portion rotates with respect to the outer cylinder portion and the guide protrusion portion comes into contact with the groove end on one side of the guide groove portion. It is proposed that the inner cylinder portion is rotated with respect to the outer cylinder portion and the guide protrusion portion is brought into contact with the groove end on the other side of the guide groove portion to be in the used state. NS.

With such a configuration, it is possible to prevent the inner cylinder portion from unintentionally rotating due to the drainage spirally transmitted along the inner peripheral surface of the inner cylinder portion. In addition, the rotation work of the inner cylinder portion becomes easy at the time of maintenance.

Further, it is proposed that the outer peripheral surface of the inner cylinder portion has a concave recess for finger hooking.

With such a configuration, the operator can hang a finger or the like on the finger hook recess to rotate the inner cylinder portion, so that the indirect drainage joint can be quickly attached and maintained.

The joint for indirect drainage of the present invention has an excellent effect of facilitating maintenance work.

It is explanatory drawing which shows the pipe connection structure which used the joint for indirect drainage which concerns on Example. An indirect drainage joint according to an embodiment is shown, (a) is a perspective view, and (b) is a front view. An indirect drainage joint according to an embodiment is shown, (a) is a plan view, and (b) is a cross-sectional view taken along the line AA of FIG. 2 (b). An indirect drainage joint according to an embodiment is shown, FIG. 2A is a sectional view taken along line BB of FIG. 2B, and FIG. 2B is a sectional view taken along line CC of FIG. 2B. FIG. 3A is an enlarged cross-sectional view taken along the line DD of FIG. 3A, and particularly shows an introduction joint portion. FIG. 3 (a) is an enlarged cross-sectional view taken along the line EE, showing a check valve in particular. FIG. 3B is a cross-sectional view taken along the line FF of FIG. 3 (b). It is an enlarged cross-sectional view which shows the convex step part. It is explanatory drawing which shows the operation outline of a check valve, (a) shows a fluid backflow prevention state, and (b) shows a passing state. An outer cylinder according to an embodiment is shown, (a) is a perspective view, and (b) is a front view. An outer cylinder according to an embodiment is shown, (a) is a plan view, and (b) is a sectional view taken along line GG of FIG. 10 (b). An outer cylinder according to an embodiment is shown, FIG. 10A is a sectional view taken along line HH of FIG. 10B, FIG. 10B is a sectional view taken along line II of FIG. 11A, and FIG. ) Is a cross-sectional view taken along the line JJ of FIG. 11 (b). An inner cylinder according to an embodiment is shown, (a) is a perspective view, and (b) is a front view. An inner cylinder according to an embodiment is shown, (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. 13A is a cross-sectional view taken along the line LL of FIG. 13B, and FIG. 13B is a cross-sectional view taken along the line MM of FIG. 14A. The introduction joint portion according to the embodiment is shown, (a) is a perspective view, and (b) is a front view. The introduction joint portion according to the embodiment is shown, (a) is a plan view, and (b) is a partially cutout bottom view. An introduction joint portion according to an embodiment is shown, FIG. 16A is a sectional view taken along line NN of FIG. 16B, and FIG. 17B is a sectional view taken along line OO of FIG. 17A. It is explanatory drawing which shows the state when the introduction joint part is attached to the main body joint part. It is explanatory drawing which shows the state which connected the main body joint part to the drainage pipe part. It is explanatory drawing which shows the case where the introduction joint part is connected to the main body joint part, and the introduction joint part is in the separated state. It is a vertical cross-sectional view of the joint for indirect drainage which concerns on Example, and shows the case where the introduction joint part is in a connected state. It is explanatory drawing which shows the state which the check valve is replaced.

An embodiment in which the indirect drainage joint of the present invention is used for a drainage route for draining drainage such as a water heater will be described in detail. The present invention is not limited to the examples shown below, and the design can be changed as appropriate.

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

[Indirect drainage fitting]
Hereinafter, the structure of the indirect drainage joint 1 will be described.

[Main body joint]
As shown in FIGS. 2 and 3, the indirect drainage joint 1 includes a cylindrical main body joint portion 15 whose axial direction is substantially up and down.

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.

Further, a drainage space 16 through which drainage flows from top to bottom is formed in the main body joint portion 15, and an upper opening 17 communicating with the drainage space 16 is formed at the upper end portion of the main body joint portion 15. A lower opening 18 communicating with the drainage space 16 is formed at the lower end portion.

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

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

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

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

More specifically, the check valve 20 has an elastically deformable valve structure in which drainage such as drainage can flow through the inside and the diameter is reduced toward the lower side. Then, as shown in FIG. 3b, the discharge port 22 formed at the lower end portion is in a closed state when a pair of flat plate-shaped mouth edge portions 23, 23 facing each other are in close contact with each other in a normal state. .. Then, in a normal state where drainage or the like does not flow in the state where the construction as shown in FIG. 1 is completed, as shown in FIG. 9a, the rims 23 and 23 of the check valve 20 are in close contact with each other and the discharge port 22. Is in the closed fluid backflow prevention state α. In such a state, the fluid (drainage or gas) in the drainage main 8 is prevented from flowing out to the upstream side of the check valve 20. Therefore, the fluid does not leak into the device 2 and the device is not damaged.

On the other hand, when drainage such as drainage flows out from the device 2 and a predetermined amount of drainage such as drainage is accumulated in the check valve 20, the check valve 20 is elastically deformed by the weight of the drainage such as drainage and is shown in FIG. 9b. The rim portions 23 and 23 are separated from each other, and the discharge port 22 is in an open passing state β. In such a state, drainage such as drainage in the check valve 20 is appropriately discharged to the downstream side. When the drainage such as drainage accumulated in the check valve 20 is properly discharged, the check valve 20 returns to its original shape and returns to the fluid backflow prevention state α.

Even if the drainage from the downstream drainage pipe portion 10 flows back to the indirect drainage joint 1, the backflow water can flow out from the drainage space 16 through the outer water passage portion 32, so that the indirect drainage can be performed. The structure is properly 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 a downstream end (lower end) of the outer cylinder portion 30. The outflow side connection portion 31 is connected to the downstream side drainage pipe end portion 10a formed at the upstream end of the downstream side drainage pipe portion 10.

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

Further, in the side peripheral portion of the outer cylinder portion 30, the portion opposite to the outer water passage portion 32 (the portion on the other side) is the outer opening 33 for taking out the check valve (outer opening for taking out the fluid backflow prevention means). Part) is provided. The check valve take-out outer opening 33 is an opening for replacing the check valve 20 described above, and has a size through which the check valve 20 can pass.

Further, as shown in FIG. 11b, the outer peripheral surface of the outer cylinder portion 30 below the outer water passage portion 32 and the outer opening 33 for taking out the check valve is directed toward the axis of the outer cylinder portion 30. A convex step portion 34 formed of a portion where the cylinder wall is thickened is formed around the axis. Further, as shown in FIG. 11a, a guide projecting portion 35 projecting upward is provided on the upper surface of the convex step portion 34. As shown in FIG. 12b, the guide projecting portion 35 is formed so as to be coupled to the tapered inner peripheral surface of the outer cylinder portion 30 whose diameter is slightly reduced inward.

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

Further, as shown in FIG. 10 and the like, on the outer peripheral surface of the upstream end (upper end) of the outer cylinder portion 30, connecting pieces 36, 37 composed of horizontally extended plate pieces are provided. It is arranged in pairs on the top and bottom. The connecting pieces 36 and 37 are provided on the same side as the side on which the outer water passage portion 32 is arranged, and have a collar structure that projects horizontally from the outer peripheral surface of the outer cylinder portion 30. Further, the connecting pieces 36, 37 arranged vertically are connected to each other by a pair of left and right reinforcing bridge parts 38, 38.

Further, on the upper surface of the upper connecting piece portion 36, a pair of left and right locking step portions 41, 41 protruding upward are formed. A pair of locked piece portions 72, 72 provided in the introduction joint portion 60, which will be described later, are locked to the locking step portions 41, 41.

Further, as shown in FIG. 10a, the upstream end (upper end) of the outer cylinder 30 and the side opposite to the side where the outer water passage 32 is located (the outer opening 33 for taking out the check valve) On the arranged side), an outer concave groove 45 for passing through the introduction joint portion, which is notched downward, is recessed.

Next, the inner cylinder portion 50 will be described.

As shown in FIG. 13 and the like, the inner cylinder portion 50 is composed of a cylinder member having an outer diameter slightly smaller than the inner diameter of the outer cylinder portion 30. Then, 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 convex step portion 34 of the outer cylinder portion 30 and supported from below.

Further, the height dimension of the inner cylinder portion 50 is such that the upper end of the inner cylinder portion 50 and the upper end of the outer cylinder portion 30 are substantially equal in height when the inner cylinder portion 50 is housed in the outer cylinder portion 30. It is a dimension. Further, in a state where the inner cylinder portion 50 is arranged in the outer cylinder portion 30, the inner cylinder portion 50 is coaxially rotatable with respect to the outer cylinder portion 30.

Further, a check valve take-out inner opening 51 that can communicate with the check valve take-out outer opening 33 is formed in a predetermined portion (one side portion) of the side peripheral portion of the inner cylinder portion 50. There is. The check valve take-out inner opening 51 is an opening for replacing the check valve 20 and the like, and the check valve 20 can pass through, like the check valve take-out outer opening 33 described above. It is a dimension.

Further, in the side peripheral portion of the inner cylinder portion 50, a non-water passage portion 52 having no internal / external communication portion is formed in a portion (a portion on the other side) opposite to the check valve outlet inner opening 51. Has been done. Further, a plurality (five) of vertically long rib-shaped ridges 53 along the vertical direction are provided at a portion on the inner peripheral surface side of the non-water passage portion 52 at intervals in the circumferential direction. As shown in FIGS. 4, 14 and the like, the convex portion 53 is raised inside the inner cylinder portion 50.

Further, as shown in FIGS. 14a and 14c, the main body joint portion is formed on the inner peripheral surface of the inner cylinder portion 50 at the boundary portion between the inner opening 51 for taking out the check valve and the non-water passage portion 52. A pair of convex barrier portions 54, 54 projecting toward the axis side of the inner cylinder portion 50 (that is, the axis side of the inner cylinder portion 50) are formed along the vertical direction.

Further, as shown in FIGS. 8 and 15, a downwardly inclined portion 55 that inclines downward toward the inside is provided at the lower end portion of the inner peripheral surface of the inner cylinder portion 50. Then, as shown in FIG. 8, in a state where the inner cylinder portion 50 is housed in the outer cylinder portion 30, the lower end of the downward inclined portion 55 corresponding to the inner peripheral edge at the lower end portion of the inner cylinder portion 50 is the outer cylinder portion. It is located on the axis side of the inner cylinder portion 50 with respect to the inner peripheral edge of the convex step portion 34 of the 30. However, the position where the bayonet mechanism 25 has a convex portion 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 provided 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 it. In such a configuration, when the inner cylinder portion 50 rotates in the outer cylinder portion 30, the guide protruding portion 35 moves relatively in the guide groove portion 56, and the guide protruding portion 35 is on one side of the guide groove portion 56. When it comes into contact with the groove end, the check valve take-out outer opening 33 and the check valve take-out inner opening 51 communicate with each other to enter the open state γ 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 passage portion 32 is in a shielded use state δ (see FIGS. 7, 22 and the like).

Further, as shown in FIG. 13, the upstream end (upper end) of the inner cylinder portion 50 and the side opposite to the side where the non-water passage portion 52 is located (the inner opening 51 for taking out the check valve) On the arranged side), an inner concave groove 57 for passing through the introduction joint portion, which is notched downward, is recessed.

Further, as shown in FIGS. 13a and 14c, recessed groove-shaped finger hook recesses 58 having a vertical direction as a longitudinal direction are spaced apart from each other in the circumferential direction on the outer peripheral surface of the non-water passage portion 52 in the inner cylinder portion 50. A plurality (5 pieces) are formed. The finger hook recess 58 is formed at a portion corresponding to the above-mentioned ridge portion 53.

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

The introduction joint portion 60 has a lid shape as shown in FIG. 16 and the like, and a plurality (three) pipe end connection ports 61, 62, 63 are provided on the side peripheral portions of the introduction joint portion 60. .. Specifically, the pipe end connection ports 61, 62, and 63 are juxtaposed in the lateral direction (almost horizontal direction) adjacent to each other and are opened laterally. The pipe end connection ports 61, 62, 63 are individually connected to the upstream drainage pipe ends 5, 6 and 7, and the pipe end connection ports 61, 62, 63 are used. The connection port according to the present invention is configured.

Further, as shown in FIGS. 17 and 18, drainage passages 61a, 62a, 63a are individually formed for each pipe end connection port 61, 62, 63 in the introduction joint portion 60, and these drainages are drained. The passages 61a, 62a, 63a are arranged side by side in the left-right direction.

Further, as shown in FIGS. 17 and 18a, outlets 61b and 62b are independently opened downward along the vertical direction at each downstream end of the drainage passages 61a, 62a and 63a juxtaposed in the left-right direction. , 63b are provided. More specifically, the opening shape of the central outlet 62b has a substantially triangular shape with the wall on the pipe end connection port 62 side as the base, and the flow on both the left and right sides via the hypotenuse portion of the outlet 62b. The outlets 61b and 63b are adjacent to each other on both sides. With such a configuration, in the drainage passages 61a, 62a, 63a, the drainage flowing through the drainage passages 61a, 62a, 63a from the pipe end connection ports 61, 62, 63 to the outlets 61b, 62b, 63b is different. It is prevented that the drainage passages 61a, 62a, and 63a of the above are mixed and flow back to the device 2 side.

Further, as shown in FIG. 18 and the like, a convex first guide transmission portion 65 is projected vertically downward on the wall surface portion on the pipe end connection port 62 side facing the central outlet 62b. On the other hand, a convex second guide transmission portion 66 projects vertically downward on the wall surface portion on the opposite side of the first guide transmission portion 65 facing the outlets 61b, 62b, 63b. Here, in the first guide transmission unit 65 and the second guide transmission unit 66, the drainage introduced into the introduction joint portion 60 flows back to another drainage passage or the like along the wall surface portion of the introduction joint portion 60. Has a function to prevent. Therefore, the drainage discharged from the introduction joint portion 60 is guided to appropriately flow down to the lower drainage space 16.

As shown in FIG. 17b, of the outlets 61b, 62b, 63b juxtaposed in the left-right direction, the drainage is guided toward the outlet 61b on the downstream end side of the drainage passage 61a located on the outside. The drainage guide first wall portion 61c is erected in the vertical direction. Further, at the opening edge of the outlet 61b, a curved drainage guide second wall portion (drainage guide wall portion) that guides drainage toward the non-passing portion 52 side of the main body joint portion 15 toward the axis of the main body joint portion 15. ) 61d is erected in the vertical direction. That is, the drainage guide first wall portion 61c smoothly guides the drainage flowing through the outer wall surface in the drainage passage 61a to the outflow port 61b side. By providing the drainage guide second wall portion 61d continuous with the drainage guide first wall portion 61c, the drainage flowing out from the outflow port 61b is on the non-water passage portion 52 side of the main body joint portion 15 and is outside through. It is guided toward the side farther from the water part 32. As a result, it is prevented that the drainage is directly scattered to the outside from the outer water passage portion 32. It should be noted that such a configuration is similarly applied to the drainage passage 63a and the outflow port 63b located on the opposite side, and the description thereof will be omitted because the structure has a symmetrical shape.

Further, as shown in FIG. 16, on the outer peripheral portion of the introduced joint portion 60, a plate piece-shaped joint portion connecting guide portion 71 protruding downward has an outer peripheral shape (substantially U-shaped) of the introduced joint portion 60. It is formed along. Further, as shown in FIG. 17b and the like, a pair of locked pieces on both sides formed of an inner wall surface having a thick inner wall surface are provided at both ends of the joint portion connection guide portion 71 on the pipe end connection port 62 side. Parts 72 and 72 are provided.

Further, at both ends of the joint portion connection guide portion 71, convex stepped guide convex portions 74 provided with a gap below the locked piece portion 72 are provided. The gap between the locked piece portion 72 and the guide convex portion 74 is the guide groove portion 73.

[Sliding structure]
The above-mentioned introduction joint portion 60 is attached to the main body joint portion 15 by the following procedure.
As shown in FIG. 19, the introduction joint portion 60 is arranged so that the check valve outlet outer opening 33 of the main body joint portion 15 and the pipe end connection ports 61, 62, 63 face each other. Further, the rotation position of the inner cylinder portion 50 is set so that the inner opening 51 for taking out the check valve and the outer opening 33 for taking out the check valve of the outer cylinder 30 communicate with each other, and the introduction joint of the outer cylinder portion 30 is set. The outer concave groove 45 for passing the portion and the inner concave groove 57 for passing the introduction joint portion of the inner cylinder portion 50 are kept in communication with each other. Then, the introduced joint portion 60 is assembled by bringing the introduced joint portion 60 closer to the main body joint portion 15 in the horizontal direction so that the locked pieces 72, 72 of the introduced joint portion 60 are brought into contact with the upper connecting piece portion 36. .. Then, in this assembly process, the outer edge of the connecting piece portion 36 of the main body joint portion 15 is fitted into the guide groove portion 73 of the introduction joint portion 60, and the guide convex portion 74 of the introduction joint portion 60 is used for connecting a pair of upper and lower parts. It fits into the gap between the pieces 36 and 37. Then, the introduced joint portion 60 becomes slidable with respect to the main body joint portion 15 while the joint portion connecting guide portion 71 of the introduced joint portion 60 receives a guiding action 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 gets over the locking step 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 such a mounted state, since the guide convex portion 74 of the introduction joint portion 60 is fitted between the upper and lower pair of connecting pieces 36 and 37 of the main body joint portion 15, the introduction joint portion 60 is fitted into the main body joint portion 15. On the other hand, the structure is such that it is difficult to detach upward.

When the assembled state is obtained by the above procedure, the main body joint portion 15 is connected to the downstream end portion of the introduction joint portion 60. For example, the drainage introduced into the introduction joint portion 60 has outlets 61b, 62b, 63b. It flows out to the drainage space 16 through the drainage space 16.

By the way, in the process of mounting the introduction joint portion 60 while sliding it with respect to the main body joint portion 15, the first guide transmission portion 65 and the second guide transmission portion 66 of the introduction joint portion 60 communicate with each other in the main body joint portion 15. It passes through the concave groove portion formed by the outer concave groove 45 for passing through the introduction joint portion and the inner concave groove 57 for passing through the introduction joint portion. Therefore, the first guide transmission unit 65 and the second guide transmission unit 66 do not hinder the sliding operation of the introduction joint portion 60 at the time of mounting.

By executing the reverse procedure of the assembly procedure described above, 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 to be properly detached.

[Piping connection method]
Next, a pipe connection method using the above-mentioned indirect drainage joint 1 will be described.

In order to construct the pipe connection structure 11 using the above-mentioned indirect drainage joint 1, first, as shown in FIG. 20, the downstream side drainage formed at the upstream end of the downstream side drainage pipe portion 10 which was previously piped. 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 cylinder portion 30 of the main body joint portion 15 is arranged so that the outer water passage portion 32 faces the upstream side drain pipe end portions 5, 6 and 7 side of the preceding piping. In FIG. 20, only the central upstream drainage pipe end portion 6 is shown in cross section, and the other upstream drainage pipe end portions 5 and 7 are not shown to simplify the description.

Here, the rotation position of the inner cylinder portion 50 is a position where the inner opening 51 for taking out the check valve and the outer opening 33 for taking out the check valve of the outer cylinder 30 are in communication with each other in the open state γ. Then, the outer concave groove 45 for passing through the introduction joint portion of the outer cylinder portion 30 and the inner concave groove 57 for passing through the introduction joint portion of the inner cylinder portion 50 are in communication with each other.

In this state, as shown in FIG. 21, the introduction joint portion 60 is attached to the main body joint portion 15. Here, in the initial position before sliding the introduction joint portion 60, the pipe end connection ports 61, 62, 63 of the introduction joint 60 are separated from the upstream drainage pipe ends 5, 6 and 7, and the separated state ε. It becomes. Then, in the separated state ε, the pipe ends of the upstream drainage pipe ends 5, 6 and 7 are cut to an appropriate length.

Then, the introduction joint portion 60 at the initial position is slid in a direction approaching the upstream drainage pipe ends 5, 6 and 7, and the pipe end connection ports 61, 62, 63 of the introduction joint 60 and the upstream drainage pipe are drained. It is assumed that the connection state ζ is connected to the pipe end portions 5, 6 and 7 (see FIG. 23). Since the introduction joint portion 60 slides in the direction along the pipe axis of the upstream drainage pipe end portions 5, 6 and 7, the connected state ζ can be surely obtained.

After that, as shown in FIG. 22, the inner cylinder portion 50 is rotated with respect to the outer cylinder portion 30, and the outer water passage portion 32 and the check valve take-out inner opening 51 are in communication with each other. The pipe connection work is completed with.

In this way, even if the upstream drainage pipe ends 5, 6 and 7 and the downstream drainage pipe 10 that have been previously piped are in the state of hell piping, the indirect drainage joint 1 is used to easily connect the pipes. be able to.

By the way, as shown in FIG. 23, when a problem occurs in the check valve 20 due to aged deterioration or the like, only the check valve 20 can be replaced in the indirect drainage joint 1. Specifically, when the inner cylinder portion 50 is rotated with respect to the outer cylinder portion 30 to bring the open state γ, the check valve 20 in the indirect drainage joint 1 is changed to the outer opening 33 for taking out the check valve. A new check valve 20 can be attached by pulling out the check valve from the inside opening 51 for taking out the check valve. Further, when the inner cylinder portion 50 is rotated with respect to the outer cylinder portion 30 and the guide protrusion 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 check valve take-out inner opening are opened. It is possible to set the usage state δ in which the unit 51 communicates with the unit 51.

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

The introduction joint portion 60 is slidable along the pipe axis direction of the pipe end portions of the upstream drain pipe end portions 5, 6 and 7 with respect to the main body joint portion 15 connected to the downstream drain pipe portion 10. Therefore, the introduction joint portion 60 is in the separated state ε separated from the pipe end portions of the upstream drain pipe end portions 5, 6 and 7, and the introduction joint portion 60 is the pipe end portion of the upstream drain pipe end portions 5, 6 and 7. The state can be converted to the connection state ζ connected to. Therefore, it is not necessary to shift the positions of the upstream drainage pipe end portions 5, 6, 7 and the like even in the state of the hell pipe, 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 end portions 5, 6 and 7, since the introduction joint portion 60 is provided with a plurality of pipe end connection ports 61, 62, 63, a plurality of drains and the like are drained. Can be treated as wastewater at once.

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 inner opening 51 for taking out the check valve are in communication with each other, the drainage is momentum. Even if it often flows into the drainage space 16, this drainage hits the non-passing portion 52 and flows down appropriately. 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 portion of the introduction joint portion 60 facing the outlets 61b, 62b, 63b, a convex first guide transmission portion 65 and a second guide transmission portion 66 that transmit the drainage and guide the drainage to the drainage space 16 are provided. It protrudes vertically downward. Therefore, the drainage introduced along the direction intersecting the vertical direction can be guided by changing the direction so as to be appropriately directed to the drainage space 16.

Drainage passages 61a, 62a, 63a are individually formed for each pipe end connection port 61, 62, 63 provided in the introduction joint portion 60, and along the vertical direction at the downstream ends of the drainage passages 61a, 62a, 63a. Outlets 61b, 62b, 63b that are independently opened downward are provided. Therefore, even when a large amount of drainage is introduced into the introduction joint portion 60, the drainage flowing through one drainage passage 61a, 62a, 63a flows into another drainage passage 61a, 62a, 63a and flows back. Can be prevented.

Since the non-water passage portion 52 is provided with the convex portion 53 along the vertical direction, the drainage flowing through the non-water passage portion 52 is smoothly guided downward and flows down in the normal state.

In particular, in the configuration in which the upstream drainage pipe end portions 5, 6 and 7 are connected sideways to the introduction joint portion 60, the drainage easily flows down the inner peripheral surface of the main body joint portion 15 in a spiral manner. , The convex portion 53 allows the water to flow down preferably.

At the boundary between the inner cylinder portion 50 for taking out the check valve and the non-water flow portion 52, convex barrier portions 54 and 54 protruding toward the axis side of the main body joint portion 15 are vertically oriented. It is formed along. Therefore, in the usage state δ, the barrier portions 54 and 54 are located at the boundary between the outer water passage portion 32 and the non-water passage portion 52, and the drainage flowing through the non-water passage portion 52 passes through the outer water passage portion 32. It is possible to prevent the water from scattering to the outside.

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

Since the inner cylinder portion 50 is supported from below by the convex step portion 34 formed on the inner peripheral surface of the outer cylinder portion 30, the structure can be simplified and the manufacturing cost can be suppressed to a low level.

Further, a downward inclined portion 55 that inclines downward 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 downward inclined portion 55 is a convex step portion 34 of the outer cylinder portion 30. It is located on the axis side of the inner cylinder portion 50 with respect to the tip of the inner cylinder portion 50. Therefore, it is possible to prevent the drainage flowing along the inner peripheral surface of the inner cylinder portion 50 from leaking from the gap between the inner cylinder portion 50 and the outer cylinder portion 30, and an auxiliary member such as an O-ring is not required.

A guide protrusion 35 is provided on the outer cylinder portion 30, and a guide groove portion 56 into which the guide protrusion 35 is inserted is formed on the inner cylinder portion 50. Then, when the inner cylinder portion 50 is rotated with respect to the outer cylinder portion 30, when the guide protrusion portion 35 comes into contact with the groove end on one side of the guide groove portion 56, the open state γ is set and the other side of the guide groove portion 56 is set. When the guide protrusion 35 comes into contact with the groove end of the above, the used state δ is reached. Therefore, it is possible to prevent the inner cylinder portion 50 from unintentionally rotating due to the force of the drainage spirally transmitted on the inner peripheral surface of the inner cylinder portion 50. Further, since the rotation range of the inner cylinder portion 50 is restricted, the rotation work of the inner cylinder portion 50 becomes easy at the time of maintenance.

Further, since the concave finger hooking recess 58 is formed on the outer peripheral surface of the inner cylinder portion 50, the rotation operation of the inner cylinder portion 50 becomes easy.

The drainage guide first wall portion 61c can smoothly guide the drainage in the drainage passage 61a to the outlet 61b side. Further, the drainage guide second wall portion 61d continuous with the drainage guide first wall portion 61c is separated from the outer water passage portion 32 by guiding the drainage flowing out from the outflow port 61b toward the axis of the main body joint portion 15. In addition, the drainage can be discharged at a position close to the non-water passage portion 52, and the drainage can be prevented from being directly scattered to the outside.

[Main part of the present invention]
The main parts of the present invention will be described again below.

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

Since the inner cylinder portion 50 is supported from below by the convex step portion 34 formed on the inner peripheral surface of the outer cylinder portion 30, the structure can be simplified and the manufacturing cost can be suppressed to a low level.

Further, a downward inclined portion 55 that inclines downward 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 downward inclined portion 55 is a convex step portion 34 of the outer cylinder portion 30. It is located on the axis side of the inner cylinder portion 50 with respect to the tip of the inner cylinder portion 50. Therefore, it is possible to prevent the drainage flowing along the inner peripheral surface of the inner cylinder portion 50 from leaking from the gap between the inner cylinder portion 50 and the outer cylinder portion 30, and an auxiliary member such as an O-ring is not required.

A guide protrusion 35 is provided on the outer cylinder portion 30, and a guide groove portion 56 into which the guide protrusion 35 is inserted is formed on the inner cylinder portion 50. Then, when the inner cylinder portion 50 is rotated with respect to the outer cylinder portion 30, when the guide protrusion portion 35 comes into contact with the groove end on one side of the guide groove portion 56, the open state γ is set and the other side of the guide groove portion 56 is set. When the guide protrusion 35 comes into contact with the groove end of the above, the used state δ is reached. Therefore, it is possible to prevent the inner cylinder portion 50 from unintentionally rotating due to the force of the drainage spirally transmitted on the inner peripheral surface of the inner cylinder portion 50. Further, since the rotation range of the inner cylinder portion 50 is restricted, the rotation work of the inner cylinder portion 50 becomes easy at the time of maintenance.

Further, since the concave finger hooking recess 58 is formed on the outer peripheral surface of the inner cylinder portion 50, the rotation operation of the inner cylinder portion 50 becomes easy.

In the above embodiment, the dimensions and shape of each part can be freely selected as appropriate. It is desirable that the height of the outer water passage portion 32 is 50 mm or more in order to surely 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, or two or one.

The pipe ends of the upstream drainage pipe ends 5, 6 and 7 do not have to be along the horizontal direction, and may be in a direction intersecting the vertical direction. Further, correspondingly, the sliding direction of the introduction joint portion 60 can be appropriately determined. However, in consideration of ease of construction, it is desirable that the pipe ends of the upstream drainage pipe ends 5, 6 and 7 are in the horizontal direction.

Further, it is sufficient that the separated state ε and the connected state ζ can be 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 the connected state ζ at the limit position of the slidable range.

The first guide transmission unit 65 and the second guide transmission unit 66 may be formed individually, or may be formed so as to project vertically downward so as to surround the outlets 61b, 62b, 63b.

The ridge portion 53 provided in the non-water passage portion 52 may be a ridge portion formed by denting the ridge instead of the ridge.

As the check valve 20 as the fluid backflow preventing means, a backflow preventing means configured by another known technique may be used.

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

Further, the indirect drainage joint 1 may be used not only for indirect drainage of drainage such as drainage, but also for indirect drainage of rainwater.

Further, the indirect drainage joint 1 described so far has a configuration in which the introduction joint portion 60 is slidable with respect 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 be slidable, or the introduction joint portion 60 and the main body joint portion 15 are integrated. Of course.

1 Indirect drainage joints 5, 6, 7 Upstream drainage pipe end (upstream drainage pipe end)
10 Drainage pipe (downstream drainage pipe)
11 Piping connection structure 15 Main body joint 16 Drainage space 32 Outer water passage (water passage)
34 Convex step 52 Non-water flow part 53 Convex part 54 Barrier part 55 Downward inclined part 58 Finger hook recess 60 Introductory joint part 61, 62, 63 Pipe end connection port (connection port)
61a, 62a, 63a Drainage passages 61b, 62b, 63b Outlet 65 1st guidance transmission section (guidance transmission section)
66 Second guidance transmission unit (guidance transmission unit)
ε Separation state ζ Connection state

Claims (4)

It is an indirect drainage joint for indirect drainage of drainage flowing from the upstream drainage pipe toward the downstream drainage pipe.
An introduction joint portion connected to a pipe end portion on the downstream side of the upstream drainage pipe and into which drainage flowing from the upstream drainage pipe is introduced.
A main body joint portion that is connected to the downstream end of the introduction joint portion and has a drainage space inside in which the drainage introduced into the introduction joint portion flows down from the top to the bottom.
Is equipped with
Further, a fluid backflow prevention means is arranged at a predetermined position in the drainage space of the main body joint portion.
The main body joint portion includes an outer cylinder portion coaxially arranged with respect to the main body joint portion and an inner cylinder arranged within the outer cylinder portion and coaxially rotatable with respect to the outer cylinder portion. Equipped with a part
A water passage portion that communicates the drainage space with the outside of the main body joint portion is provided on one side of the peripheral wall portion of the outer cylinder portion, and the fluid backflow prevention means is provided on the other side portion. An outer opening for taking out the fluid backflow prevention means having a size that allows the fluid backflow prevention means to pass through is provided, and the peripheral wall portion of the inner cylinder portion is provided with an inner side for taking out the fluid backflow prevention means having a size that allows the fluid backflow prevention means to pass through. There is an opening,
By rotating the inner cylinder portion with respect to the outer cylinder portion,
An open state in which the outer opening for taking out the fluid backflow preventing means and the inner opening for taking out the fluid backflow preventing means communicate with each other.
The usage state in which the water passage portion and the fluid backflow prevention means take-out inner opening are communicated with each other.
A joint for indirect drainage, which is characterized by being able to freely change the state to each state. By mounting the inner cylinder portion on the convex step portion formed on the inner peripheral surface of the outer cylinder portion, the inner cylinder portion is supported by the convex step portion, and the inner cylinder portion is supported by the convex step portion.
The lower end of the inner peripheral surface of the inner cylinder portion is provided with a downwardly inclined portion that inclines downward toward the inside, and the lower end of the downwardly inclined portion is more than the tip of the convex step portion. The indirect drainage joint according to claim 1, which is located on the axis side of the above. One of the outer cylinder portion and the inner cylinder portion is provided with a guide projecting portion projecting toward the other.
A guide groove portion into which the guide protrusion portion is inserted is formed in any one of the outer cylinder portion and the inner cylinder portion.
When the inner cylinder portion rotates with respect to the outer cylinder portion and the guide protrusion portion comes into contact with the groove end on one side of the guide groove portion, the open state is established.
The first or second aspect of the present invention, wherein the inner cylinder portion rotates with respect to the outer cylinder portion and the guide protrusion portion comes into contact with the groove end on the other side of the guide groove portion to be in the used state. Joint for indirect drainage. The indirect drainage joint according to any one of claims 1 to 3, wherein a concave finger hook recess is formed on the outer peripheral surface of the inner cylinder portion.

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