JP6886884B2 - Indirect drainage fitting - Google Patents

Description

The present invention relates to an indirect drainage joint that enables indirect drainage on a drainage route portion.

Conventionally, it has been adopted as a drainage route for draining drainage of equipment such as a water heater, and prevents the drainage from flowing back from the drainage pipe on the downstream side and adversely affecting the equipment. The indirect drainage structure is already well known (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2016-21166

However, in the indirect drainage joint disclosed in Patent Document 1, when the drainage flowing into the inflow portion flows out from the outflow port corresponding to the lower end of the water flow cylinder portion, the drainage is scattered to the outside through the opening. There was a problem that it would end up.

Therefore, an object of the present invention is to provide an indirect drainage joint capable of suppressing the drainage flowing inside from scattering to the outside.

The present invention is formed at the downstream end of the upstream drain pipe arranged on the upstream side, and is arranged at the upstream drain pipe end where the drainage flowing from the upstream flows out and the downstream side of the upstream drain pipe. A downstream drainage pipe end formed at the upstream end of the downstream drainage pipe and into which drainage flowing from the upstream flows, and the upstream drainage pipe end and the downstream drainage pipe end are in the vertical direction. It is an indirect drainage joint that connects the upstream side drainage pipe end portion and the downstream side drainage pipe end portion on the drainage path portion facing each other, and is a nested outer joint portion and inner joint portion. At the upstream end of the inner joint, an inflow side connection to which the upstream drain pipe end is connected is formed, and the outer peripheral wall of the inner joint is formed. An inner water passage portion that communicates the internal space of the inner joint portion with the outside of the inner joint portion is provided, and the downstream end of the outer joint is the end of the downstream drain pipe. The outflow side connection portion to which the outer joint portion is connected is formed, and the outer peripheral wall portion of the outer joint portion is provided with an outer water passage portion that communicates the internal space of the outer joint portion with the outside of the outer joint portion. Further, the indirect drainage joint is characterized in that at least the lower end of the inner joint portion is located on the downstream side of the lower end of the outer water passage portion in the outer joint portion.

In such a configuration, when the drainage that has flowed into the inner joint portion flows out to the outer joint portion side through the inner joint portion, the position where it drips from the inner joint portion is higher than the lower end of the outer water passage portion. Since it is on the downstream side, it is possible to prevent the drainage from scattering to the outside from the outer water passage portion.

The drainage includes drainage drainage discharged from equipment arranged on the upstream side, rainwater discharged from a rain gutter arranged on the upstream side, and the like.

In the above configuration, it is proposed that the inner water passage portion provided in the inner joint portion includes a single or a plurality of through holes formed in the side peripheral wall portion of the inner joint portion.

Further, the inner water passage portion provided in the inner joint portion includes a single or a plurality of slits formed spirally on the side peripheral wall portion of the inner joint portion along the axis of the inner joint portion. The configuration is proposed.

Further, the inner water passage portion provided in the inner joint portion includes a single or a plurality of vertically long slits formed on the side peripheral wall portion of the inner joint portion along the axis of the inner joint portion. Proposed.

With the above configuration, a film of water is formed in the slit when the drainage flows out from the slit, so that it is difficult for the drainage to scatter outward from the slit due to the action of surface tension. There is an advantage.

Further, it is proposed that the lower end portion of the inner joint portion is provided with a long transmission portion extending toward the downstream side of the inner water passage portion.

With such a configuration, the wastewater flows downward along the transmission portion, so that there is an advantage that the scattering range is reduced.

Further, the present invention is formed at the downstream end of the upstream drain pipe arranged on the upstream side, and is arranged at the upstream drain pipe end where the drainage flowing from the upstream flows out and the downstream side of the upstream drain pipe. The upstream end of the drain pipe and the end of the downstream drain pipe include the end of the downstream drain pipe formed at the upstream end of the downstream drain pipe and into which the drainage flowing from the upstream flows. An indirect drainage joint that connects the upstream drainage pipe end and the downstream drainage pipe end on a drainage path facing each other in the vertical direction, and is a nested outer joint and inner side. An inflow side connection portion to which the upstream side drain pipe end portion is connected is formed at the upstream end portion of the inner joint portion, and the outer peripheral wall portion of the inner joint portion is provided. Is provided with an inner water passage portion that communicates the internal space of the inner joint portion with the outside of the inner joint portion, and the downstream end of the outer joint portion is provided with the downstream drain pipe. An outflow side connection portion to which the end portion is connected is formed, and an outer water passage portion that communicates the internal space of the outer joint portion and the outside of the outer joint portion is formed on the outer peripheral wall portion of the outer joint portion. The inner joint portion is made of a bottomed member having a bottom portion, and the inner water passage portion is provided only on the side peripheral wall portion of the inner joint portion. Is.

With such a configuration, the drainage that has flowed down in the inner joint portion is once received by the bottom portion and then flows out into the outer joint portion via the inner water passage portion. Therefore, the inner joint portion There is an advantage that the scattering range when flowing out from the water is reduced. In addition, since the water passage portions are provided in both the outer joint portion and the inner joint portion, the upstream drainage pipe end is indirectly piped when the operator observes from the outside of the indirect drainage joint. It can be easily confirmed that the fitting is done. In addition, since the inner joint is made of a bottomed member, it is possible to prevent backflow water (sewage) from the downstream from entering the inner joint, and the backflow water is directed toward the outer water passage. It has the advantage of being easy to guide.

Further, it is proposed that the inner joint portion is made of a bottomed member having a bottom portion, and the outermost lower surface of the bottom portion has a pointed shape protruding toward the downstream side.

With such a configuration, the drainage that flows out from the inner water passage portion of the inner joint portion and flows down along the outer peripheral surface of the inner joint portion will flow down so as to drip from the pointed portion. Therefore, there is an advantage that the scattering range when the water flows out from the inner joint portion is reduced.

Further, it is proposed that the inner joint portion is made of a bottomed member having a bottom portion, and the inner bottom surface of the bottom portion has a pointed shape protruding toward the upstream side.

With such a configuration, it is possible to alleviate the impact when the drainage flowing down collides with the bottom portion, and there is an advantage that the scattering range when the drainage flows out from the inner joint portion is reduced.

The inner joint portion has a tapered shape in which the outer diameter is reduced toward the downstream side, and the separation distance from the inner peripheral surface of the outer joint portion is increased toward the downstream side. Proposed.

With such a configuration, it becomes difficult for the drainage discharged from the inner joint portion to reach the outer water passage portion of the outer joint portion, so that the drainage is scattered to the outside through the outer water passage portion. Can be suppressed.

Further, the inner joint portion includes a connecting member on which the inflow side connecting portion is formed and a water passing member on which the inner water passing portion is formed as separate members. It is rotatable with respect to the connecting member along the axis of the inner joint portion, and the water passing member passes through the inner joint portion from the outside of the outer joint portion via the outer water passing portion. A configuration having a shape that makes the flowing drainage visible only from a specific direction is proposed.

With such a configuration, when arranging the inner joint portion, the orientation of the water passing member with respect to the connecting member can be easily adjusted so that the flow-down mode of the drainage can be confirmed from the outside. In this way, the flow-down mode of the drainage can be visually recognized from the outside through the outer water passage portion, so that it can be easily confirmed that the upstream drainage pipe is indirectly piped.

Further, the present invention is formed at the downstream end of the upstream drain pipe arranged on the upstream side, and is arranged at the upstream drain pipe end where the drainage flowing from the upstream flows out and the downstream side of the upstream drain pipe. The downstream drainage pipe end, which is formed at the upstream end of the downstream drainage pipe and into which the drainage flowing from the upstream flows, includes the upstream drainage pipe end and the downstream drainage pipe end. An indirect drainage joint that connects the upstream drainage pipe end and the downstream drainage pipe end on a drainage path facing each other in the vertical direction, and is a nested outer joint and inner side. A joint portion is provided, and an inflow side connection portion to which the upstream drainage pipe end portion is connected is formed at an upstream end portion of the inner joint portion, and an outer peripheral wall portion of the inner joint portion is formed. Is provided with an inner water passage portion that communicates the internal space of the inner joint portion with the outside of the inner joint portion, and the downstream end of the outer joint portion is provided with the downstream drain pipe. An outflow side connection portion to which the end portion is connected is formed, and an outer water passage portion that communicates the internal space of the outer joint portion and the outside of the outer joint portion is formed on the outer peripheral wall portion of the outer joint portion. The inner joint portion is provided with a connecting member on which the inflow side connecting portion is formed and a water passing member on which the inner water passing portion is formed as separate members, and the water passing portion is provided. The member is rotatable with respect to the connecting member along the axis of the inner joint portion, and the water-passing member is from the outside of the outer joint portion to the inside of the outer joint portion via the outer water-passing portion. It is an indirect drainage joint characterized by having a shape that makes the drainage flowing in the joint portion visible only from a specific direction.

Even in such a configuration, when arranging the inner joint portion, the orientation of the water passing member with respect to the connecting member can be easily adjusted so that the drainage flow mode can be confirmed from the outside. In this way, the flow-down mode of the drainage can be visually recognized from the outside through the outer water passage portion, so that it can be easily confirmed that the upstream drainage pipe is indirectly piped.

The joint for indirect drainage of the present invention has an effect that the drainage circulating inside is hard to be scattered to the outside.

It is explanatory drawing which shows the use state of the indirect drainage joint which concerns on Example 1. FIG. It is external perspective view of the joint for indirect drainage which concerns on Example 1. FIG. The joint for indirect drainage according to the first embodiment is shown, (a) is a front view, and (b) is a vertical sectional view. The joint for indirect drainage according to the first embodiment is shown, (a) is a side view, and (b) is a vertical sectional view. It is explanatory drawing which shows the operation outline of a valve body, (a) shows a fluid backflow prevention state, and (b) shows a passing state. An indirect drainage joint in a state where the inner diameter reduced portion and the ridge portion are engaged is shown, (a) is a side view, and (b) is a vertical cross-sectional view. It is explanatory drawing which shows the process of connecting the joint for indirect drainage. It is explanatory drawing which shows the process of connecting the joint for indirect drainage. It is a vertical cross-sectional view which shows the state which the water passing member and the connecting member were separated. It is a vertical sectional view which shows the joint for indirect drainage which concerns on Example 2. FIG. It is a vertical sectional view which shows the joint for indirect drainage which concerns on Example 3. FIG. (A) is a vertical sectional view of the inner joint portion according to the fourth embodiment, (b) is a vertical sectional view of the inner joint portion according to the fifth embodiment, and (c) is a vertical sectional view of the inner joint portion according to the sixth embodiment. It is a vertical sectional view of. (A) is a vertical sectional view of the inner joint portion according to the seventh embodiment, (b) is a vertical sectional view of the inner joint portion according to the eighth embodiment, and (c) is a vertical sectional view of the inner joint portion according to the ninth embodiment. It is a vertical sectional view of (d), and (d) is a bottom view of (c). The inner joint portion according to the tenth embodiment is shown, (a) is a front view, and (b) is a vertical sectional view. The joint for indirect drainage according to the tenth embodiment is shown, (a) is a front view, and (b) is a vertical sectional view.

An embodiment in which the indirect drainage joint of the present invention is used on a drainage path portion for draining drainage drainage of 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.

[Example 1]
As shown in FIG. 1, the indirect drainage joint 1 is arranged and used between the water heater 70 arranged on the upstream side and the drainage main 75 arranged on the downstream side. Specifically, the indirect drainage joint 1 is connected to the drain pipe portion 71, which is an upstream drainage pipe for discharging the drainage drainage of the water heater 70, and communicates with the stile 74 connected to the drainage main pipe 75. A drainage pipe portion 73, which is a downstream drainage pipe, is connected. The indirect drainage joint 1 has a function of indirectly draining the drainage drainage flowing from the upstream toward the drainage main 75.

Hereinafter, the configuration of the indirect drainage joint 1 will be described.
As shown in FIGS. 2 to 4, the indirect drainage joint 1 is inserted into the tubular outer joint portion 10 whose axial direction is the vertical direction and the inner side of the outer joint portion 10 and assembled in a nested manner. A tubular inner joint portion 30 is provided.

First, the outer joint portion 10 will be described.
As shown in FIGS. 2 to 4, the downstream end (lower end) of the outer joint 10 is directly connected to the downstream drain pipe end 73a formed at the upstream end of the drain pipe 73. A pipe-shaped outflow side connection portion 11 is formed.

Further, the outer joint portion 10 includes a cylindrical water passing member 15 arranged on the upper side and a tubular connecting member 16 arranged on the lower side and including the outflow side connecting portion 11. Here, the water passing member 15 and the connecting member 16 are separate members from each other, and are connected by a known bayonet mechanism 17 so as to be detachable in the axial direction (vertical direction).

Further, among the outer peripheral wall portions of the water passage member 15, a plurality of side peripheral wall portions having a side peripheral surface communicate the internal space (outer internal space) 12 of the outer joint portion 10 and the outside of the outer joint portion 10. An outer water passage portion 13 formed of a through hole is provided. The plurality of through holes are arranged vertically and horizontally, and the lower end of the outer water passage portion 13 corresponds to the position of the through hole at the lowest position.

Further, as shown in FIGS. 3b and 4b, an inner diameter reduced portion 18 having a reduced inner diameter is formed at the upper end opening of the water passage member 15. The stopper function of the inner diameter reduced portion 18 will be described later.

On the other hand, as shown in FIGS. 3b and 4b, a check valve 20 as a trap means is detachably attached to the lower end of the water flow member 15. The check valve 20 has a function of allowing drainage drainage to flow in the downstream direction in the indirect drainage joint 1 and preventing the drainage from flowing back in the upstream direction.

More specifically, the check valve 20 has an elastically deformable valve structure in which drainage drainage can flow inside and the diameter is reduced toward the lower side. The discharge port 22 (see FIG. 5) formed at the lower end is closed by the pair of flat plate-shaped rims 23, 23 facing each other in normal contact with each other.

Next, the inner joint portion 30 will be described.
As shown in FIGS. 2, 3a and 4a, the upstream drainage pipe end 71a formed at the downstream end of the drain pipe 71 is connected to the upstream end (upper end) of the inner joint 30. The inflow side connecting portion 31 to be formed is formed in a female screw shape. As shown in FIG. 7a, the upstream drainage pipe end 71a of the drain pipe 71 has a male screw shape that can be screwed to the inflow side connection 31 of the inner joint 30, and the upstream drainage. The pipe end portion 71a and the inflow side connecting portion 31 are screwed together to fix each other.

Further, as shown in FIG. 2 and the like, an engaged portion 32 having a hexagonal columnar outer shape is formed on the outer peripheral surface of the inner joint portion 30. As a result, the work of screwing the inflow side connection portion 31 to the upstream side drainage pipe end portion 71a can be easily and quickly performed by engaging a general tool such as a hexagon wrench with the engaged portion 32. ..

Further, in the inner joint portion 30, a cylindrical sliding cylinder portion 35 inserted into the inner diameter reduced portion 18 of the outer joint portion 10 is formed in a portion below the engaged portion 32. Further, at the lower end of the sliding cylinder portion 35, a large diameter portion 36 having an outer diameter that cannot pass through the inner diameter reduced portion 18 of the outer joint portion 10 is formed.

In addition, a ridge portion 37 is formed in a circumferential shape on the outer peripheral surface of the upper end portion of the sliding cylinder portion 35. Specifically, the ridge portion 37 has an outer diameter slightly larger than the inner diameter of the inner diameter reduced portion 18 so that it can be engaged with the inner diameter reduced portion 18 of the outer joint portion 10.

Next, the operation mode of the outer joint portion 10 with respect to the inner joint portion 30 will be described.
Since the outer joint portion 10 and the inner joint portion 30 are assembled in a nested manner as described above, the outer joint portion 10 and the inner joint portion 30 are slidable in the vertical direction with respect to each other. Here, the sliding range of the outer joint portion 10 when the inner joint portion 30 is used as a reference is as follows.

That is, when the outer joint portion 10 is located at the upper limit as shown in FIGS. 6a and 6b, the inner diameter reduced portion 18 of the outer joint portion 10 and the ridge portion 37 of the inner joint portion 30 are engaged with each other. It becomes immovable to each other. As described above, when the inner diameter reduced portion 18 functions as a stopper, the separation distance between the outflow side connection portion 11 and the inflow side connection portion 31 in the indirect drainage joint 1 is minimized. The engaging means is composed of the inner diameter reduced portion 18 of the outer joint portion 10 and the ridge portion 37 of the inner joint portion 30.

On the other hand, as shown in FIG. 3, when the outer joint portion 10 is located at the lower limit, the inner diameter reduced portion 18 of the outer joint portion 10 and the large diameter portion 36 of the inner joint portion 30 are engaged with each other. .. At this time, in the indirect drainage joint 1, the separation distance between the outflow side connection portion 11 and the inflow side connection portion 31 becomes maximum.

Next, an example of a method of connecting the indirect drainage joint 1 on the drainage path portion X will be described with reference to FIGS. 7 and 8.

As shown in FIG. 7 (a), on the drainage path portion X between the drain pipe portion 71 and the drain pipe portion 73 facing each other in the vertical direction, the core of the drain pipe portion 73 is first shifted to drain. A space is secured below the pipe portion 71 so that the indirect drainage joint 1 can intervene. In this case, the drain pipe portion 71 side may be bent to secure a space for connecting the indirect drainage joint 1.

Next, as shown in FIG. 7B, the inflow side connection portion 31 of the indirect drainage joint 1 is screwed onto the upstream drainage pipe end portion 71a of the drain pipe portion 71. At this time, since the engaged portion 32 is formed in the inner joint portion 30 of the indirect drainage joint 1, the work can be easily and quickly performed using a general tool such as a hexagon wrench. At this time, the indirect drainage joint 1 is in a state in which the inner diameter reduced portion 18 of the outer joint portion 10 and the ridge portion 37 of the inner joint portion 30 are engaged with each other. That is, the distance between the outflow side connection portion 11 and the inflow side connection portion 31 is the minimum.

After that, as shown in FIG. 8A, the core of the drainage pipe portion 73 is returned to the original position. In this state, the downstream drainage pipe end portion 73a of the drainage pipe portion 73 is located directly below the outflow side connection portion 11 of the indirect drainage joint 1.

Then, as shown in FIG. 8B, the outer joint portion 10 is pulled downward so as to disengage the inner diameter reduced portion 18 of the outer joint portion 10 and the ridge portion 37 of the inner joint portion 30. Then, the outflow side connection portion 11 and the downstream side drain pipe end portion 73a of the drain pipe portion 73 are connected, and the work of connecting the pipes is completed. As a result, a pipe connection structure is constructed in which the indirect drainage joint 1 is connected on the drainage path portion X.

In this way, the indirect drainage joint 1 is not forcibly fitted between the drain pipe portion 71 and the drain pipe portion 73, but is drained by sliding the outer joint portion 10 and the inner joint portion 30 up and down. The pipe portion 71 and the drainage pipe portion 73 can be connected in order.

In the normal state where the drain drainage does not flow in the state where the construction as shown in FIG. 1 is completed, the rims 23 and 23 of the check valve 20 are in close contact with each other as shown in FIG. 5 (a). The discharge port 22 is closed and the fluid backflow prevention state α is set. In such a state, the fluid (drainage or gas) in the drainage main 75 is prevented from flowing out to the upstream side of the check valve 20. Therefore, the fluid does not leak into the water heater 70 and the equipment is not damaged.

On the other hand, when the drain drainage flows out from the water heater 70 and a predetermined amount of drain drainage is accumulated in the check valve 20, the check valve 20 is elastically deformed by the weight of the drain drainage and is shown in FIG. 5 (b). As shown, the rim portions 23 and 23 have a shape that is separated from each other, and the discharge port 22 is in an open passing state β. In such a state, the drain drainage in the check valve 20 is appropriately discharged to the downstream side. Further, the indirect drainage joint 1 has a configuration in which the inner joint portion 30 is arranged on the upper side and the outer joint portion 10 is arranged on the lower side, and the drain drainage is from the inner joint portion 30 having a small inner diameter to the inner diameter. Since the structure is such that the drainage flows toward the large outer joint portion 10, the drain drainage is smoothly drained without staying in the indirect drainage joint 1. When the drain 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 drainage pipe portion 73 flows back to the indirect drainage joint 1, the backflow water can flow out from the outer internal space 12 to the outside through the outer water passage portion 13, so that the indirect drainage structure is formed. Well built.

In the above-mentioned pipe connection step, an adhesive or the like may be applied in advance to the upstream drainage pipe end 71a and the downstream drainage pipe end 73a. In particular, since the upstream side drain pipe end portion 71a and the upstream side connecting portion 31 are connected by screwing, it is possible to prevent water leakage from the screwed portion by using sealing tape.

Further, the connection method of the indirect drainage joint 1 is not limited to the above contents. For example, after connecting the downstream side drainage pipe end portion 73a and the outflow side connection portion 11 first, the upstream side drainage pipe end portion 71a and the upstream side are connected. You may connect it to the side connection part 31.

Further, as shown in FIG. 9, in the indirect drainage joint 1, the bayonet mechanism 17 can be released while the indirect drainage joint 1 is connected to the pipe, and the water passing member 15 and the connecting member 16 can be divided into upper and lower parts. Therefore, the check valve 20 can be replaced from the gap between the water passing member 15 and the connecting member 16 to perform maintenance work.

Further, the outer joint portion 10 and the inner joint portion 30 are preferably made of synthetic resin from the viewpoint of ease of molding, but the present invention is not limited to this.

Further, as the configuration for connecting the water passing member 15 and the connecting member 16, of course, another configuration may be adopted instead of the bayonet mechanism.

Further, the check valve 20 is not limited to the above-mentioned configuration, and may have a configuration using, for example, a float (floating member). Further, the check valve 20 is not essential.

Further, the shape of the water passage portion 13 may have a configuration other than the above-mentioned shape. However, if it is composed of an excessively large through hole, insects or the like may enter from the outside and hinder the function of the indirect drainage joint 1, so it is desirable that the through hole has an appropriate size.

Further, the engaged portion 32 does not have to have a hexagonal column shape, and may have another shape. Further, for example, a hole into which a screwdriver or the like can be inserted may be provided, and the screwdriver or the like may be inserted into the hole to rotate the inner joint portion 30 around the axis. When the upstream drainage pipe end portion 71a has a straight pipe shape instead of a male screw shape, the shape of the inflow side connecting portion 31 may be a shape corresponding to this.

Next, a main part of the present invention will be described. Specifically, the inner joint portion 30 will be described in detail.

As shown in FIG. 3b and the like, the portion of the inner joint portion 30 below the large diameter portion 36 has a bottomed tubular shape having a bottom portion 41 at the tip (lower end) and is downstream (lower side). ), The outer diameter is tapered.

Further, the inner bottom surface 41a, which is the inner peripheral surface of the bottom portion 41, has a pointed shape protruding toward the upstream side (upper side). On the other hand, the outermost lower surface 41b, which is the outer peripheral surface of the bottom portion 41, has a pointed shape protruding toward the downstream side (lower side).

Further, of the outer peripheral wall portion below the large diameter portion 36 of the inner joint portion 30, a slit 42 vertically elongated in the vertical direction is provided on the side peripheral wall portion which is a portion excluding the bottom portion 41 of the inner joint portion 30. Multiple pieces are arranged side by side around the axis. By forming the slit 42 in this way, the inner inner space 43 of the inner joint portion 30 and the outer inner space 12 corresponding to the outer side are communicated with each other. The slit 42 constitutes the inner water passage portion according to the present invention.

Further, in the indirect drainage joint 1 in the present embodiment, in the state where the construction as shown in FIG. 1 is completed, the outermost lower surface 41b of the bottom portion 41, which is the lowermost end of the inner joint portion 30, is the outer joint portion 10. It is located on the downstream side (lower side) of the outer water passage portion 13 in the above.

With the above configuration, the drain drainage discharged from the drain pipe portion 71 into the inner joint portion 30 drips from the outermost lower surface 41b of the bottom portion 41 arranged on the downstream side of the outer water passage portion 13. It is suppressed that the drain drainage is scattered to the outside through the outer water passage portion 13 of the outer joint portion 10.

Further, as described above, the inner joint portion 30 has a tapered shape, and the separation distance between the inner peripheral surface of the outer joint portion 10 and the inner joint portion 30 increases toward the downstream side, so that drainage drainage occurs. Scattering to the outside is further suppressed.

In addition, the drain drainage that has flowed into the inner joint portion 30 is once received by the bottom portion 41 and then flows out to the outer internal space 12 through the slit 42, so that the scattering range of the drain drainage is reduced.

Further, since the inner bottom surface 41a of the bottom portion 41 of the inner joint portion 30 has a pointed shape, the impact when the flowing drainage drainage collides with the bottom portion 41 is mitigated, and the scattering range of the drainage drainage is further reduced. ing.

Further, since the outermost lower surface 41b at the bottom 41 of the inner joint portion 30 has a pointed shape, the drain drainage flows down along the outer lowermost surface 41b so as to drip down to the outside of the drain drainage. Scattering is greatly suppressed.

[Example 2]
The indirect drainage joint 2 according to the second embodiment will be described with reference to FIG. Those having the same configuration as that of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

The portion of the inner joint portion 52 of the indirect drainage joint 2 below the large diameter portion 36 has a bottomed tubular shape having a bottom portion 45 at the tip, and the outer diameter increases toward the downstream side (lower side). It has a tapered shape that reduces the diameter. Further, the inner bottom surface 45a of the bottom portion 45 has a pointed shape protruding toward the upstream side.

Further, the outer lower end portion 45b of the bottom portion 45 has a concave shape that is recessed upward along a substantially vertical direction. The outer lower end portion 45b is located on the downstream side (lower side) of the lower end of the outer water passage portion 13 in the outer joint portion 10.

Further, a plurality of slits 46 formed spirally along the axis of the inner joint portion 52 are provided on the side peripheral wall portion below the large diameter portion 36 of the inner joint portion 52. The shape of the slit 46 is a curved shape. Further, the slit 46 may be singular.

In the indirect drainage joint 2, the drainage drainage that has flowed from the drain pipe portion 71 into the inner joint portion 52 may drip from the outer lower end portion 45b of the bottom portion 45 and flow down to the outside. It is suppressed.

Further, since the inner joint portion 52 has a tapered shape and the separation distance from the inner peripheral surface of the outer joint portion 10 becomes larger toward the downstream side, the drain drainage is further suppressed from scattering to the outside. Has been done.

In addition, since the drain drainage is once received by the bottom 45 and then flows out to the outer internal space 12 through the slit 46, the scattering range of the drain drainage is reduced.

Further, since the inner bottom surface 45a of the bottom portion 45 has a pointed shape, the impact when the drain drainage collides with the bottom portion 45 is mitigated, and the scattering range of the drain drainage is further reduced.

[Example 3]
The indirect drainage joint 3 according to the third embodiment will be described with reference to FIG. Those having the same configuration as those of Examples 1 and 2 are designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIG. 11, the shape of a plurality of slits 47 spirally formed along the axis of the inner joint portion 53 on the side peripheral wall portion of the inner joint portion 53 is a straight shape. Further, the slit 47 may be singular.

[Example 4]
The inner joint portion 54 according to the fourth embodiment will be described with reference to FIG. 12a. Those having the same configuration as those of Examples 1 to 3 are designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIG. 12a, the inner joint portion 54 has a plurality of through holes 62 provided in the side peripheral wall portion and through holes 61 formed at the lower end.

[Example 5]
The inner joint portion 55 according to the fifth embodiment will be described with reference to FIG. 12b. Those having the same configuration as those of Examples 1 to 4 are designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIG. 12b, a plurality of vertically long slits 63 formed along the axial direction of the inner joint portion 55 are provided on the side peripheral wall portion of the inner joint portion 55. The slit 63 has a shape in which the lower end is open, and a through hole 61 communicating with the slit 63 is formed at the lower end of the inner joint portion 55.

[Example 6]
The inner joint portion 56 according to the sixth embodiment will be described with reference to FIG. 12c. Those having the same configuration as those of Examples 1 to 5 are designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIG. 12c, a plurality of slits 64 formed along the axis of the inner joint portion 56 are provided on the side peripheral wall portion of the inner joint portion 56. Further, a through hole 61 is formed at the lower end of the inner joint portion 56.

[Example 7]
The inner joint portion 57 according to the seventh embodiment will be described with reference to FIG. 13a. Those having the same configuration as those of Examples 1 to 6 are designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIG. 13a, a single spirally formed slit 65 is provided on the side peripheral wall portion of the inner joint portion 57. Further, a bottom hole portion 61 is formed at the lower end of the inner joint portion 57.

[Example 8]
The inner joint portion 58 according to the eighth embodiment will be described with reference to FIG. 13b. Those having the same configuration as those of Examples 1 to 7 are designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIG. 13b, the outer peripheral wall portion of the inner joint portion 58 is provided with only a single slit 66 formed in a spiral shape.

[Example 9]
The inner joint portion 59 according to the ninth embodiment will be described with reference to FIGS. 13c and 13d. Those having the same configuration as those of Examples 1 to 8 are designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIGS. 13c and 13d, a plurality of bridges 67, 67, 67 are laid across the inner joint portion 59, and further downstream (lower side) from the portion where the bridges 67 intersect. ), A long transmission portion 68 is extended.

[Example 10]
As shown in FIGS. 14 and 15, the indirect drainage joint 4 of this embodiment includes an outer joint portion 80 and an inner joint portion 90.

A window-shaped outer water passage portion 82 is provided on the side peripheral portion of the outer joint portion 80. On the other hand, in the inner joint portion 90, a connecting member 91 having a cylindrical shape and having an inflow side connecting portion 31 formed and a water passing member 92 having a cylindrical shape and having an inner water passing portion 95 formed thereof are used as separate members. It is equipped. The connecting member 91 and the water passing member 92 are rotatably removable around the axis of the inner joint portion 90.

Further, the lower end portion of the inner joint portion 90 is cut diagonally with respect to the axis of the inner joint portion 90, and the cut portion is defined as the inner water passage portion 95. Since the inner water passage portion 95 is cut diagonally with respect to the axis of the inner joint portion 90 in this way, the inner joint portion 90 is arranged at a position where the outer water passage portion 82 and the inner water passage portion 95 face each other. Then, the internal space can be confirmed from the outside. At the same time, the drainage from the inside is discharged downstream through the wall surface of the water passage member 92, so that the scattering of the drainage is further suppressed.

In the indirect drainage joint 4, as shown in FIG. 15, by facing the opening surface of the inner water passage portion 95 to the outer water passage portion 82, the inner passage from the outside via the outer water passage portion 82. The drainage flowing down the water portion 95 can be made visible.

For example, in the step of connecting the downstream side drain pipe end portion 73a and the outflow side connection portion 11 (see FIG. 8), the outer joint portion 80 is connected so that the window-shaped outer water passage portion 82 faces a desired direction. After that, the water passage member 92 of the inner joint portion 90 is rotated about the axis so that the inner water passage portion 95 faces the outer water passage portion 82. As a result, the drainage flowing down the inner water passage portion 95 can be made visible from the outside through the outer water passage portion 82. As described above, since the drainage flow mode can be visually recognized from the outside through the outer water passage portion 82, it can be easily confirmed that the drain pipe portion 71 is indirectly piped. Here, since the connecting member 91 and the water flow member 92 are composed of separate members, after connecting the inner joint portion 90 to the drain pipe portion 71 and the outer joint portion 80 to the drain pipe portion 73, tentatively If the outer water passage portion 82 of the outer joint portion 80 and the inner water passage portion 95 of the inner joint portion 90 are displaced from the proper positions (opposing positions), the water passage member 92 is moved to the inner joint portion 90. By rotating it around the axis and adjusting it, it is possible to correct it to an appropriate position (opposing position).

Even in the indirect drainage joint 4 in this embodiment, the lower end of the inner water passage portion 95, which is the lower end of the inner joint portion 90, is positioned on the downstream side (lower side) of the lower end of the outer water passage portion 82. Therefore, it is possible to prevent the wastewater from scattering to the outside. In particular, the inner water passage portion 95 of this embodiment has a shape that moves away from the outer water passage portion 82 toward the downstream side, so that the scattering of drainage drainage is more effectively suppressed.

In the above embodiment, the dimensions and shape of each part can be freely selected as appropriate.

Further, instead of the configuration in which the check valve 20 as a trap means is attached, a device (trap means) for preventing insects and odors as an invading object from entering toward the upstream is used. May be good.

Further, the indirect drainage joint 1 may be used as a path for discharging rainwater flowing through the rain gutter, instead of the above-mentioned usage pattern. For example, the lower end of the rain gutter arranged on the upstream side is connected to the inflow side connecting portion 31 of the indirect drainage joint 1, and the drainage communicating with the rainwater main arranged on the downstream side is connected to the outflow side connecting portion 11. A configuration in which the pipes are connected is proposed. The indirect drainage joint 1 having such a configuration has a function of indirectly draining rainwater flowing from the upstream toward the rainwater main.

1-4 Indirect drainage joints 10,80 Outer joints 11 Outflow side connections 13,82 Outer water passages 30, 52 to 58, 90 Inner joints 31 Inflow side connections 41, 45 Bottoms 41a, 45a Inner bottom 41b Outer outermost bottom surface 42,46,63-66 Slit 61,62 through hole (inner water passage part)
68 Transmission section 71 Drain pipe section (upstream drainage pipe)
71a Upstream drainage pipe end 73 Drainage pipe section (downstream drainage pipe)
73a Downstream drainage pipe end 75 Drainage main pipe 95 Inner water passage

Claims (7)

The upstream drainage pipe end, which is formed at the downstream end of the upstream drainage pipe arranged on the upstream side and the drainage flowing from the upstream flows out, and the downstream drainage pipe arranged on the downstream side of the upstream drainage pipe. Including the downstream drainage pipe end formed at the upstream end of the above and into which the drainage flowing from the upstream flows, the upstream drainage pipe end and the downstream drainage pipe end face each other in the vertical direction. It is an indirect drainage joint that connects the upstream side drainage pipe end portion and the downstream side drainage pipe end portion on the drainage path portion.
It has an outer joint and an inner joint that are assembled in a nested manner.
An inflow side connection portion to which the upstream side drain pipe end portion is connected is formed at the upstream end portion of the inner joint portion, and the inner joint portion is formed at the outer peripheral wall portion of the inner joint portion. There is an inner water passage that communicates the internal space of the inner space with the outside of the inner joint.
Further, an outflow side connection portion to which the downstream side drain pipe end portion is connected is formed at the downstream end portion of the outer joint portion, and the outer peripheral wall portion of the outer joint portion is formed with the outer joint portion. An outer water passage portion that communicates the internal space of the portion with the outside of the outer joint portion is provided.
Further, the indirect drainage joint is characterized in that at least the lower end of the inner joint portion is located on the downstream side of the lower end of the outer water passage portion in the outer joint portion. The upstream drainage pipe end formed at the downstream end of the upstream drainage pipe arranged on the upstream side and the drainage flowing from the upstream flows out, and the downstream drainage pipe arranged on the downstream side of the upstream drainage pipe. Including the downstream drainage pipe end formed at the upstream end of the above and into which the drainage flowing from the upstream flows, the upstream drainage pipe end and the downstream drainage pipe end face each other in the vertical direction. An indirect drainage joint that connects the upstream drainage pipe end and the downstream drainage pipe end on the drainage path portion.
It has an outer joint and an inner joint that are assembled in a nested manner.
An inflow side connection portion to which the upstream side drain pipe end portion is connected is formed at the upstream end portion of the inner joint portion, and the inner joint portion is formed at the outer peripheral wall portion of the inner joint portion. There is an inner water passage that communicates the internal space of the inner space with the outside of the inner joint.
Further, an outflow side connection portion to which the downstream side drain pipe end portion is connected is formed at the downstream end portion of the outer joint portion, and the outer peripheral wall portion of the outer joint portion is formed with the outer joint portion. An outer water passage portion that communicates the internal space of the portion with the outside of the outer joint portion is provided.
An indirect drainage joint characterized in that the inner joint portion is made of a bottomed member having a bottom portion, and the inner water passage portion is provided only on the side peripheral wall portion of the inner joint portion. The indirect drainage according to claim 1 or 2, wherein the inner joint portion is made of a bottomed member having a bottom portion, and the outermost lower surface of the bottom portion has a pointed shape protruding toward the downstream side. Fittings. The method according to any one of claims 1 to 3, wherein the inner joint portion is made of a bottomed member having a bottom portion, and the inner bottom surface of the bottom portion has a pointed shape protruding toward the upstream side. Indirect drainage fittings. The inner joint portion has a tapered shape in which the outer diameter is reduced toward the downstream side, and the separation distance from the inner peripheral surface of the outer joint portion is increased toward the downstream side. The joint for indirect drainage according to any one of claims 4. The inner joint portion includes a connecting member on which the inflow side connecting portion is formed and a water passing member on which the inner water passing portion is formed as separate members.
The water passage member is rotatable with respect to the connection member along the axis of the inner joint portion, and the water passage member is from the outside of the outer joint portion to the outer water passage portion via the outer water passage portion. The indirect drainage joint according to any one of claims 1 to 5, which has a shape that makes the drainage flowing in the inner joint portion visible only from a specific direction. The upstream drainage pipe end formed at the downstream end of the upstream drainage pipe arranged on the upstream side and the drainage flowing from the upstream flows out, and the downstream drainage pipe arranged on the downstream side of the upstream drainage pipe. Including the downstream drainage pipe end formed at the upstream end of the above and into which the drainage flowing from the upstream flows, the upstream drainage pipe end and the downstream drainage pipe end face each other in the vertical direction. An indirect drainage joint that connects the upstream drainage pipe end and the downstream drainage pipe end on the drainage path portion.
It has an outer joint and an inner joint that are assembled in a nested manner.
An inflow side connection portion to which the upstream side drain pipe end portion is connected is formed at the upstream end portion of the inner joint portion, and the inner joint portion is formed at the outer peripheral wall portion of the inner joint portion. There is an inner water passage that communicates the internal space of the inner space with the outside of the inner joint.
Further, an outflow side connection portion to which the downstream side drain pipe end portion is connected is formed at the downstream end portion of the outer joint portion, and the outer peripheral wall portion of the outer joint portion is formed with the outer joint portion. An outer water passage portion that communicates the internal space of the portion with the outside of the outer joint portion is provided.
The inner joint portion includes a connecting member on which the inflow side connecting portion is formed and a water passing member on which the inner water passing portion is formed as separate members.
The water passage member is rotatable with respect to the connection member along the axis of the inner joint portion, and the water passage member is from the outside of the outer joint portion to the outer water passage portion via the outer water passage portion. , An indirect drainage joint characterized by having a shape that makes the drainage flowing in the inner joint portion visible only from a specific direction.

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