JP2019019602A - Indirect drainage joint, method for connecting pipeline and pipeline connection structure - Google Patents

Abstract

To provide the indirect drainage joint that can easily perform connection work even if the pipeline is so-called hell pipeline.SOLUTION: The indirect drainage joint 1 comprises an outer joint part 10 and an inner joint part 30 assembled in a nest shape, wherein the inner joint part 30 has an upstream end part provided with a formed inflow side connection part 31 connecting an upstream side drainage pipe end part 71a, the outer joint part 10 has a downstream end part provided with a formed outflow side connection part 11 connecting a downstream side drainage pipe end part 73a, and the outer joint part 10 and the inner joint part 30 are slidable in a vertical direction with respect to each other.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a joint for indirect drainage that connects pipes that are so-called hell pipes.

  Conventionally, for example, it is used in a drainage route for discharging drainage drainage of equipment such as a water heater, and prevents the drainage from flowing backward from the drainage pipe on the downstream side and causing adverse effects such as failure on the equipment. The indirect drainage structure is already well known (see, for example, Patent Document 1).

JP 2016-2111166 A

  However, when constructing the drainage path as described above, there has been a case of so-called hell piping. Specifically, when the drainage pipe on the downstream side is arranged in advance and the drainage drain pipe for discharging the drainage drainage of the equipment is installed after the equipment such as the water heater is installed. It becomes hell piping. In this case, since the positions of the drain drain pipe and the downstream drain pipe are determined in advance, there is a problem that the connection work becomes difficult when connecting via the joint for indirect drainage.

  Then, an object of this invention is to provide the joint for indirect drainage which can perform a connection operation | work easily even if it becomes the above hell piping.

  It is another object of the present invention to provide a pipe connection method capable of easily performing a connection work even if it is a hell pipe.

  The present invention is formed at the downstream end of the upstream-side drain pipe piped upstream, and formed at the upstream drain pipe end portion from which the drainage flowing from the upstream flows out, and the upstream end of the downstream-side drain pipe piped upstream. A downstream drainage pipe end into which drainage flowing from upstream flows in, and on the drainage path part in which the upstream drainage pipe end and the downstream drainage pipe end face each other in the vertical direction A joint for indirect drainage that connects the upstream drain pipe end and the downstream drain pipe end, and includes an outer joint part and an inner joint part assembled in a nested manner, and the outer joint part And an inflow side connecting portion to which the upstream drain pipe end is connected is formed at an upstream end of one of the inner joint portions, and the outer joint portion and the inner joint portion. The downstream drain pipe end is in contact with the downstream end of the other joint. Are outlet side connecting portion is formed to be an indirect drainage fitting, characterized in that the outer joint part and the inner joint part is slidable in the vertical direction.

  In such a configuration, the separation distance between the inflow side connection portion and the outflow side connection portion is changed by sliding the outer joint portion and the inner joint portion in the vertical direction, and the separation distance is changed. Can be adjusted. For this reason, for example, after the joint for indirect drainage is interposed at a required position in the hell pipe in a contracted state, the joint for indirect drainage is extended to easily connect the upstream drain pipe and the downstream drain pipe. be able to.

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

  Further, it is disposed between the outer peripheral surface of the inner joint portion and the inner peripheral surface of the outer joint portion, and engages the inner joint portion and the outer joint portion with each other so as not to move relative to each other. And the inner joint portion and the outer joint portion are engaged with each other by the engagement means in a state where the separation distance between the inflow side connection portion and the outflow side connection portion is minimized. A configuration is proposed.

  By adopting such a configuration, when the indirect drainage joint as a product is transferred in a packed state, the inner joint part and the outer joint part can be fixed in a compact state. , Rattling is suppressed, and damage during transportation can be prevented. In addition, since the inner joint portion and the outer joint portion are not unintentionally detached during construction, workability is improved.

  Furthermore, a configuration is proposed in which a water passage portion is provided in the side peripheral portion of the other joint portion of the outer joint portion and the inner joint portion to communicate the internal space of the joint portion with the outside of the joint portion. Is done.

  By adopting such a configuration, if the drainage flows backward from the downstream drainage pipe end toward the upstream, the drainage flowing backward along the inner peripheral surface of the other joint can be directly discharged to the outside. it can.

  Further, trap means for allowing drainage to flow in the downstream direction and preventing entry of the entry in the upstream direction is attached to the other joint portion of the outer joint portion and the inner joint portion. A configuration is proposed.

  By adopting such a configuration, if an insect or odor as an entering matter tries to enter upstream, the trap means prevents the entering matter from entering, so that the entering matter enters the upstream drain pipe. It can be prevented from reaching.

  Here, of the outer joint portion and the inner joint portion, the other joint portion is provided with a water passage portion that communicates the internal space of the joint portion with the outside of the joint portion, It is desirable that the connecting member provided with the outflow side connecting portion is provided as a separate member, and the trap means is detachably attached to the lower end of the water passage member.

  By adopting such a configuration, by removing the water passage member and the connection member, it is possible to easily take out the trap means attached to the lower end of the water passage portion and perform maintenance work such as replacement. .

  The trap means may be a check valve that allows the drainage to flow in the downstream direction and prevents the drainage as the entry from flowing backward in the upstream direction.

  By setting it as this structure, when the waste_water | drain flows backward upstream, since the said check valve blocks the reverse flow | flow of the said waste_water | drain, it can prevent that waste_water | drain reaches | attains the said upstream drainage pipe. .

  Furthermore, it is desirable that the water flow member and the connection member are connected to each other by a bayonet mechanism.

  In such a configuration, the other joint portion is slidable in the vertical direction with respect to the one joint portion. Therefore, when a bayonet mechanism is employed, the water-permeable member and the connection member are normally strengthened. It is connected, and the water passage member and the connection member can be easily detached in the vertical direction during maintenance. For this reason, workability | operativity improves markedly.

  Further, the inflow side connection portion is formed at the upstream end portion of the inner joint portion, and the inflow side connection portion and the upstream drain pipe end portion are screwed together, A configuration is proposed in which an engaged portion to be engaged with a tool used when the inflow side connection portion is screwed to the upstream drain pipe end is formed on the outer peripheral surface of the inner joint portion.

  With this configuration, the inner joint portion can be easily and reliably screwed to the upstream drain pipe end portion using a tool.

  The present invention is also a pipe connection method using the joint for indirect drainage, wherein the inflow side connection portion and the upstream drainage pipe end portion are connected, and the outer joint portion and the inner joint portion are connected. One of them is slid vertically to increase the separation distance between the inflow side connection portion and the outflow side connection portion, thereby connecting the outflow side connection portion and the downstream drain pipe end. Or connecting the outflow side connection part and the downstream drainage pipe end part, and sliding either the outer joint part or the inner joint part in the vertical direction to form the inflow side connection part. The pipe connection method is characterized in that the inflow side connection portion and the upstream drain pipe end portion are connected by increasing a separation distance between the discharge side connection portion and the outflow side connection portion.

  In such a configuration, the piping operation of the joint for indirect drainage can be performed easily and quickly even in a situation where the upstream drain pipe and the downstream drain pipe are so-called hell piping.

  Further, the present invention is a pipe connection structure using the joint for indirect drainage described above, wherein the upstream drain pipe end is inserted into the inflow side connection and the upstream drain pipe end and the inflow side are connected. The upstream drain pipe end is inserted into the relay pipe member that is connected to the connection section or is externally fitted to the inflow side connection section, and the upstream drain pipe end section and the inflow side connection section And a pipe connection structure characterized by being connected to each other.

  Further, the present invention is a pipe connection structure using the joint for indirect drainage described above, wherein the downstream drainage pipe end is inserted into the outflow side connection, and the downstream drainage pipe end and the outflow side are inserted. The downstream drainage pipe end is inserted into the relay pipe member that is connected to the connection part or is externally fitted to the outflow side connection part, and the downstream drainage pipe end part and the outflow side connection part And a pipe connection structure characterized by being connected to each other.

  In such a pipe connection structure, since the inflow side connection part or the outflow side connection part can be connected in two types of pipe connection modes, the shape and dimensions of the upstream drain pipe end part or the downstream drain pipe end part Therefore, piping work can be performed easily and quickly.

  The joint for indirect drainage of the present invention has an effect that the upstream drainage pipe and the downstream drainage pipe can be easily and quickly connected even in a situation where the pipe is a so-called hell pipe.

  In addition, the pipe connection method of the present invention has an effect that the piping work of the joint for indirect drainage can be easily and quickly performed even in a situation where a so-called hell pipe is obtained.

  In addition, the pipe connection structure of the present invention has an effect that the piping work of the joint for indirect drainage can be easily and quickly performed according to the situation at the site.

It is explanatory drawing which shows the use condition of the joint for indirect drainage. It is an external appearance perspective view of the joint for indirect drainage. The joint for indirect drainage is shown, (a) is a front view, (b) is a longitudinal section. The joint for indirect drainage is shown, (a) is a side view, (b) is a longitudinal section. It is explanatory drawing which shows the operation | movement outline | summary of a valve body, (a) shows a fluid backflow prevention state, (b) shows a passage state. The joint for indirect drainage in the state where the inner diameter contraction part and the protruding part engaged was shown, (a) is a side view, and (b) is a longitudinal section. 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 longitudinal cross-sectional view which shows the state which made the water flow member and the connection member detach | leave. It is explanatory drawing which showed the pipe connection structure concerning another Example, (a) shows the state which connected the upstream drain pipe end part and the drain pipe part via the relay pipe member, (b) is upstream. The state which connected the side drain pipe edge part and the drain pipe part directly is shown. It is explanatory drawing which showed the pipe connection structure concerning another Example, (a) shows the state which connected the downstream drainage pipe edge part and the drainage pipe part via the relay pipe member, (b) is downstream The state which connected the side drain pipe edge part and the drain pipe part directly is shown.

  An embodiment in which the joint for indirect drainage according to the present invention is used on a drainage passage for discharging drain drainage of a water heater will be described in detail. In addition, this invention is not limited to the Example shown below, A design change is possible suitably.

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

Hereinafter, the structure of the joint 1 for indirect drainage is demonstrated.
As shown in FIGS. 2 to 4 and the like, the joint for indirect drainage 1 is inserted into the cylindrical outer joint portion 10 with the axial direction being the vertical direction and the inner side of the outer joint portion 10 and assembled in a nested manner. And a cylindrical inner joint portion 30.

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

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

  In addition, a water passage portion 13 including a plurality of through holes that communicate the internal space 12 of the outer joint portion 10 and the outside of the outer joint portion 10 is provided on the side peripheral portion of the water passage member 15.

  As shown in FIGS. 3b and 4b, an inner diameter reduced portion 18 having an inner diameter reduced is formed in 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. 3 b and 4 b, a check valve 20 as a trap means is detachably attached to the lower end of the water passage member 15. The check valve 20 has a function of allowing drain water to flow downstream in the indirect drainage joint 1 and preventing drain water from flowing backward in the upstream direction.

  More specifically, the check valve 20 has an elastically deformable valve structure in which drain drainage can flow through the inside and is reduced in diameter toward the lower side. And the discharge port 22 (refer FIG. 5) formed in the lower end part is the state closed by a pair of flat edge parts 23 and 23 which oppose in normal time mutually_contact | adhering.

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

  Moreover, as shown in FIG. 2 etc., the to-be-engaged part 32 whose outer shape has a hexagonal column shape is formed in the outer peripheral surface of the inner joint part 30. As a result, the work of screwing the inflow side connection portion 31 to the upstream drain 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. .

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

  In addition, a protrusion 37 is formed on the outer peripheral surface of the upper end portion of the sliding cylinder portion 35 in a circumferential shape. Specifically, the protruding portion 37 has an outer diameter slightly larger than the inner diameter of the inner diameter reduced diameter portion 18 so as to be engageable with the inner diameter reduced diameter portion 18 of the outer joint portion 10.

Next, the operation | movement aspect of the outer joint part 10 with respect to the inner joint part 30 is demonstrated.
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. Here, the sliding range of the outer joint part 10 when the inner joint part 30 is used as a reference is as follows.

  That is, when the outer joint portion 10 is positioned 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 protrusion 37 of the inner joint portion 30 are engaged. They cannot move each other. Thus, when the inner diameter reduced diameter portion 18 functions as a stopper, the distance between the outflow side connection portion 11 and the inflow side connection portion 31 in the indirect drainage joint 1 is minimized. The inner diameter reduced diameter portion 18 of the outer joint portion 10 and the protrusion portion 37 of the inner joint portion 30 constitute an engaging means according to the present invention.

  On the other hand, as shown in FIG. 3, when the outer joint portion 10 is positioned 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. . At this time, in the joint for indirect drainage 1, the separation distance between the outflow side connection portion 11 and the inflow side connection portion 31 is maximized.

  Next, the process of the connection method which connects the joint 1 for indirect drainage on the drainage path part X is demonstrated according to FIG. 7, FIG.

  As shown in FIG. 7A, first, the core of the drainage pipe part 73 is placed on the drainage path part X between the drain pipe part 71 and the drainage pipe part 73 that are both precedently piped and face each other in the vertical direction. To secure a space enough for the indirect drainage joint 1 to be interposed under the drain pipe portion 71. In this case, the drain pipe portion 71 side may be bent to secure a space enough to connect 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 to the upstream side drain pipe end portion 71 a of the drain pipe portion 71. At this time, since the engaged portion 32 is formed in the inner joint portion 30 of the joint for indirect drainage 1, the work can be easily and quickly performed using a general tool such as a hexagon wrench. At this time, the joint for indirect drainage 1 is in a state in which the inner diameter reduced diameter portion 18 of the outer joint portion 10 and the protrusion portion 37 of the inner joint portion 30 are engaged. That is, the separation distance between the outflow side connection portion 11 and the inflow side connection portion 31 is minimized.

  Then, as shown to Fig.8 (a), the core of the drain pipe part 73 is returned to the original position. In this state, the downstream drain pipe end 73 a of the drain pipe 73 is located directly below the outflow side connection 11 of the joint for indirect drainage 1.

  And as shown in FIG.8 (b), the outer joint part 10 is pulled down so that engagement with the internal diameter reduced diameter part 18 of the outer joint part 10 and the protrusion part 37 of the inner joint part 30 may be cancelled | released. Thus, the outflow side connecting portion 11 and the downstream side drain pipe end portion 73a of the drain pipe portion 73 are connected, and the operation of connecting the pipes is completed. Thereby, the piping connection structure concerning this invention is constructed | assembled.

  In this way, the joint for indirect drainage 1 does not forcibly fit between the drain pipe part 71 and the drain pipe part 73 which are hell pipes, but slides the outer joint part 10 and the inner joint part 30 up and down. By moving, it can be connected to the drain pipe part 71 and the drain pipe part 73 in order.

  In the state where the construction shown in FIG. 1 is completed, when the drainage does not flow normally, the mouth edges 23 and 23 of the check valve 20 are in close contact with each other as shown in FIG. The fluid reverse flow blocking state α is established with the discharge port 22 closed. In such a state, the fluid (drainage and gas) in the drain main pipe 75 is prevented from flowing out upstream from the check valve 20. Therefore, the fluid does not leak into the water heater 70 and the device is not damaged.

  On the other hand, when 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 FIG. The mouth edge portions 23 and 23 as shown in the figure are separated from each other, and a passing state β in which the discharge port 22 is opened is obtained. In such a state, drain drainage in the check valve 20 is appropriately discharged downstream. Moreover, the joint 1 for indirect drainage is the structure by which the inner joint part 30 is arrange | positioned on the upper side, and the outer joint part 10 is arrange | positioned on the lower side, Comprising: Drain drainage is an inner diameter from the inner joint part 30 with a small internal diameter. Since it is the structure which flows toward the big outer joint part 10, drain drainage is smoothly drained, without staying in the joint 1 for indirect drainage. When the drainage drainage accumulated in the check valve 20 is properly discharged, the check valve 20 returns to its original shape and enters the fluid backflow prevention state α again.

  In addition, even if drainage flows backward from the drain pipe part 73 to the joint 1 for indirect drainage, since the backflow water can flow out from the internal space 12 through the water passage part 13, the indirect drainage structure is appropriately set. Has been built.

  By the way, in the above-described pipe connection method, an adhesive or the like may be applied in advance to the upstream drain pipe end 71a or the downstream drain pipe end 73a. In particular, since the upstream drain pipe end portion 71a and the inflow side connection portion 31 are fixed to each other by screwing, water leakage from the screwed portion may be prevented by using a seal tape.

  Moreover, the connection method of the joint 1 for indirect drainage is not limited to the above, for example, after connecting the downstream drainage pipe end part 73a and the outflow side connection part 11 first, the upstream drainage pipe end part 71a and the inflow You may make it connect with the side connection part 31. FIG.

  Further, as shown in FIG. 9, with the indirect drainage joint 1 being connected to the pipe, the bayonet mechanism 17 is released to divide the water passage member 15 and the connection member 16 into upper and lower parts, and reverse from the gap. It is also possible to replace the stop valve 20. With this configuration, the maintenance work of the check valve 20 is facilitated.

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

  The outer joint portion 10 and the inner joint portion 30 are preferably made of synthetic resin for ease of molding, but are not limited thereto.

  In addition, as a configuration for connecting the water flow member 15 and the connection member 16, other configurations may be adopted instead of the bayonet mechanism.

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

  Further, the shape of the water flow portion 13 may be a configuration other than the shape described above. However, if it is configured with an excessively large through hole, insects or the like may enter from the outside to impede the function of the joint for indirect drainage 1, and therefore it is desirable that the through hole has an appropriate size.

  Further, the engaged portion 32 does not need to have a hexagonal column shape, and may have another shape. Further, for example, a hole into which a screw driver or the like can be inserted is provided, and the inner joint portion 30 may be rotated around the axis by inserting a screw driver or the like into the hole. In addition, what is necessary is just to make the shape of the inflow side connection part 31 into the shape corresponding to this, when the upstream drain pipe end part 71a is not a male screw shape but a straight pipe shape.

  In addition, the connection structure between the upstream drain pipe end 71a and the inflow side connection portion 31 may be the following structure instead of the above-described structure. That is, as shown in FIG. 10 a, the relay pipe member 80 is fitted on the inflow side connection portion 31, and the bushing 81 is interposed in the relay pipe member 80. A side drain pipe end 710a may be inserted. In addition, the outer shape of the inflow side connection portion 31 enables an indirect connection mode using the relay pipe member 80 as shown in FIG. 10a, and a mode of direct connection by screwing as shown in FIG. 10b. It is preferable to have a structure that combines two possible connection modes.

  Further, the connection structure between the downstream drain pipe end 73a and the outflow side connection portion 11 may be the following structure instead of the above-described structure. That is, as shown in FIG. 11 a, the relay pipe member 85 may be externally fitted to the outflow side connection portion 11, and further, the downstream drain pipe end 730 a may be inserted into the relay pipe member 85. Further, the outer shape of the outflow side connecting portion 11 can be connected to a downstream drain pipe end 73a having a large diameter as shown in FIG. 11a, and downstream of a small diameter as shown in FIG. 11b. It is preferable that the side drain pipe end portion 73a be connected.

  Moreover, the structure which arrange | positioned the outer joint part 10 in the upstream, and arrange | positioned the inner joint part 30 in the downstream may be sufficient.

  Moreover, it is the structure in which it replaced with the structure to which the non-return valve 20 as a trap means was attached, and the instrument (trap means) which prevents that the insect and odor as an approaching substance approached upstream is used. Also good.

  Moreover, the joint 1 for indirect drainage may be used for the path | route which discharges the rainwater which flows through a rain gutter instead of the usage pattern mentioned above. For example, drainage connected to the inflow drainage connection portion 31 of the indirect drainage joint 1 at the lower end of a rain gutter disposed on the upstream side and communicated with the stormwater main pipe disposed on the downstream side to the outflow side connection portion 11. A configuration in which the pipe parts 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.

DESCRIPTION OF SYMBOLS 1 Joint for indirect drainage 10 Outer joint part 11 Outflow side connection part 12 Internal space 13 Water flow part 15 Water flow member 16 Connection member 17 Bayonet mechanism 20 Check valve (trap means)
30 Inner joint part 31 Inflow side connection part 32 Engaged part 37 Projection part 71 Drain pipe part (upstream drain pipe)
71a, 710a Upstream drain pipe end 73 Drain pipe section (downstream drain pipe)
73a, 730a Downstream drain pipe end 80, 85 Relay pipe member

Claims (11)

An upstream drain pipe end formed at the downstream end of the upstream drain pipe piped upstream, from which drainage flowing from the upstream flows out,
Formed at the upstream end of the downstream drainage pipe piped upstream, and the downstream drainage pipe end into which drainage flowing from the upstream flows,
Indirect connection between the upstream drain pipe end and the downstream drain pipe end on the drainage path section where the upstream drain pipe end and the downstream drain pipe end face in the vertical direction. A drainage joint,
It comprises an outer joint part and an inner joint part assembled in a nested manner,
An inflow side connection portion to which the upstream drain pipe end portion is connected is formed at an upstream end portion of one of the outer joint portion and the inner joint portion,
Outflow side connection part to which the downstream drainage pipe end part is connected is formed at the downstream end part of the other joint part among the outer joint part and the inner joint part,
The joint for indirect drainage, wherein the outer joint portion and the inner joint portion are slidable in the vertical direction. An engagement means disposed between an outer peripheral surface of the inner joint portion and an inner peripheral surface of the outer joint portion, and engaging the inner joint portion and the outer joint portion with each other so as not to move relative to each other. Has
2. The state according to claim 1, wherein the inner joint portion and the outer joint portion are engaged with each other by the engagement means in a state in which a separation distance between the inflow side connection portion and the outflow side connection portion is minimized. Joint for indirect drainage. The water flow part which connects the internal space of the said joint part and the exterior of the said joint part is provided in the side peripheral part of the other joint part among the said outer joint part and the said inner joint part. Item 2. The joint for indirect drainage according to Item 2. The trap means for allowing drainage to flow in the downstream direction and preventing the entry of the entry in the upstream direction is attached to the other joint portion of the outer joint portion and the inner joint portion. The joint for indirect drainage according to any one of claims 1 to 3. Of the outer joint portion and the inner joint portion, the other joint portion is provided with a water passage portion for communicating the internal space of the joint portion with the outside of the joint portion, and the outflow side connection. And a connecting member in which the portion is arranged as a separate member,
The joint for indirect drainage according to claim 4 with which said trap means is attached to the lower end of said water flow member so that attachment or detachment is possible. The trap means comprises:
The joint for indirect drainage according to claim 4 or 5, which is a check valve that allows drainage to flow in the downstream direction and prevents backflow of drainage as an entry into the upstream direction. The joint for indirect drainage according to claim 6 with which said water flow member and said connecting member are mutually connected by a bayonet mechanism. In the upstream end portion of the inner joint portion, the inflow side connection portion is formed, and the inflow side connection portion and the upstream drainage pipe end portion are screwed,
The engagement part which the tool used when the said inflow side connection part is screwed together to the said upstream drain pipe end part is formed in the outer peripheral surface of the said inner side joint part. 8. The joint for indirect drainage according to any one of 7 above. A pipe connection method using the joint for indirect drainage according to any one of claims 1 to 8,
The inflow side connection portion and the upstream drain pipe end portion are connected, and either the outer joint portion or the inner joint portion is slid in the vertical direction so that the inflow side connection portion and the outflow side are By increasing the separation distance between the connecting portion, the outflow side connecting portion and the downstream drain pipe end are connected,
Or
The outflow side connection portion and the downstream drainage pipe end portion are connected, and either the outer joint portion or the inner joint portion is slid in the vertical direction so that the inflow side connection portion and the outflow side are A pipe connection method, wherein the inflow side connection portion and the upstream drain pipe end portion are connected by increasing a separation distance between the connection portion and the connection portion. A pipe connection structure using the joint for indirect drainage according to any one of claims 1 to 8,
The upstream drain pipe end portion is inserted into the inflow side connection portion and the upstream drain pipe end portion and the inflow side connection portion are connected, or the relay is externally fitted to the inflow side connection portion A pipe connection structure, wherein the upstream drain pipe end is inserted into a pipe member, and the upstream drain pipe end and the inflow connection are connected. A pipe connection structure using the joint for indirect drainage according to any one of claims 1 to 8,
The downstream drain pipe end portion is inserted into the outflow side connection portion and the downstream drainage pipe end portion and the outflow side connection portion are connected, or the relay is externally fitted to the outflow side connection portion. A pipe connection structure, wherein the downstream drain pipe end is inserted into a pipe member, and the downstream drain pipe end and the outflow side connection are connected.

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