JP2007063813A - Junction pipe joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a junction pipe joint which prevents seal water breakage, can arbitrarily form a step at a main pipe or/and a branch pipe depending on a construction location, and allows the installation thereof even under a floor. <P>SOLUTION: The junction pipe joint is formed of: the main pipe 1; the branch pipe 2 which is protruded diagonally sideways from the side of the main pipe 1 so as to form an angle of 25° or larger but smaller than 45° with respect to a center line CL1 of the main pipe 1; and drain pipe connection members 3 each of which is formed such that a center line CL3a of a receiving port 3a to which an upstream drain pipe 5 is connected is decentered from a center line CL3b of an insertion port 3b. Then the insertion port 3b of the drain pipe connection member 3 is connected to an upstream end of each of the main pipe 1 and the branch pipe 2. By virtue of the junction pipe joint, a pipe arrangement under the floor can be extended depending on a connection manner of the drain pipe connection members 3. Further the main pipe 1 and the branch pipe 2 are smoothly combined with each other, and the formation of a temporary water storage space P at a junction point eliminates a risk of clogging therein. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a merging pipe joint in which drainage from each water facility smoothly merges and there is no fear of backflow.

  Conventionally, for joining a drain main pipe and a drain branch pipe from a kitchen or a bathroom, for example, an inflow pipe section is formed at an angle of 45 ° or 90 ° with respect to the main pipe section, and in the middle of the bottom of the main pipe section. A drainage pipe joint or the like in which a step is provided and the bottom on the upstream side of the main pipe part is made higher than the bottom of the inflow pipe part so that the joined drainage does not flow backward to the upstream side of the main pipe part is used (Patent Document 1).

  However, in the above drainage pipe joint, since the inflow pipe part is formed at an angle of 45 ° or 90 ° with respect to the main pipe part, there is almost no space for temporarily storing drainage, and the drainage main pipe and the drainage branch pipe At the same time, when a large amount of drainage merges with the drainage pipe joint, the water level rises at the junction and becomes clogged, causing a problem that the sealing of the trap communicating with the drainage pipe is broken. In addition, when the drainage pipe joint is installed under the floor, the drainage pipe joint is also applied to a place where it is not always necessary to provide a step, such as a place where miscellaneous drainage other than toilets such as bathrooms and washrooms join. As they are arranged, the difference in height of the drainage main pipe becomes large, and there is a problem that construction is impossible when there are many confluences under the floor.

  On the other hand, a drainage basin may be used instead of the above drainage pipe joint at the junction of the drainage main pipe and the drainage branch pipe. In this way, as a drainage burial buried at the confluence, a connection port for connecting the upstream drainage main pipe and the drainage branch pipe in parallel is formed on one side of the main body, and the downstream drainage main pipe is connected on the other side. There is known a drainage basin in which a connection port is formed and an inspection connection port that opens upward is provided between the connection ports on both sides (Patent Document 2). Since this drainage basin is provided at a position where one connection port (upstream drainage pipe side) is higher than the other connection port (downstream drainage pipe side), it is possible to prevent the backflow of drainage. It has become.

However, since the drainage basin is very large compared to the pipe joint and requires a large buried space, it is not suitable for construction in a recent house with little piping space. Since the height difference between the two is large, in the case of construction under the floor, there is a problem that the pipe extension is often impossible and the construction becomes difficult.
JP 11-193560 A JP-A-6-306903

  The present invention has been made to solve the above-described problems, and prevents a water seal breakage, and can arbitrarily provide a step in the main pipe part and / or branch pipe part depending on the construction location, and can be installed under the floor. Providing joints is a problem to be solved.

  In order to achieve the above-mentioned object, the junction pipe joint according to the present invention has a main pipe part and a side obliquely from the side part of the main pipe part so as to have an angle of 25 ° or more and less than 45 ° with respect to the center line of the main pipe part. And a drain pipe connecting member formed by a branch pipe portion projecting from the drain pipe connecting member formed so that the center line of the receiving port connecting the upstream drain pipe is deviated from the center line of the insertion port. And the insertion port of a drainage pipe connection member is connected to the upstream edge part of a main pipe part and a branch pipe part, respectively, It is characterized by the above-mentioned.

  In the merging pipe joint according to the present invention, it is preferable that the branch pipe portion is provided so as to project at an angle of 30 ° with respect to the center line of the main pipe portion. Further, it is preferable that the branch pipe part is bent so as to be parallel to the main pipe part on the upstream side thereof, and the connection port for connecting the downstream drain pipe is displaced downward at the downstream end part of the main pipe part. It is preferable that the drainage pipe connecting member formed in this way is connected. And depending on the installation location, the outlet of the drainage pipe connection member is connected to the main pipe part and the branch pipe part respectively so as to be displaced upward with respect to the insertion port, or the outlet of the drainage pipe connection member is Connected to the main pipe part so as to be displaced downward with respect to the insertion port, and connected to the branch pipe part so that the receiving port of the drain pipe connection member is displaced upward with respect to the insertion port. It is preferable to use them properly.

  In the merging pipe joint of the present invention, the drain pipe connecting member formed so that the center line of the receiving port connecting the upstream drain pipe is deviated with respect to the center line of the inlet is formed from the main pipe portion and the branch pipe portion. Since they are separated and formed separately, it is possible to arbitrarily select whether or not to provide a step depending on how the drainage pipe connecting member is connected, as will be described later. Therefore, in places where miscellaneous wastewater that contains almost no solid matter joins, the difference in level of the drainage main pipe can be kept to a minimum by providing no step, so that piping under the floor can be extended. Become. Since the drain pipe connecting member is a common member that can be connected to both the main pipe portion and the branch pipe portion, the cost can be reduced. Moreover, since the inflow angle of the branch pipe part is set to 25 ° or more and less than 45 °, the branch pipe part into which drainage from the toilet or the like flows and the main pipe part are combined as compared with the conventional drain pipe joint. Is smooth, and a temporary water storage space is formed at the junction.

  In particular, the junction pipe joint projecting so that the branch pipe part has an angle of 30 ° with respect to the center line of the main pipe part is most preferable in terms of the balance between the total length, the temporary water storage space, and the level difference.

  The merge pipe joint that is bent so that the branch pipe section is parallel to the main pipe section on the upstream side of the branch pipe section is installed even when the right and left piping space under the floor is narrow because the width of the merge pipe joint is reduced. can do.

  A confluence pipe joint with a drain pipe connecting member formed by shifting the connection port connected to the downstream drain pipe downwardly at the downstream end of the main pipe section is easy to mold and reduces manufacturing costs. It is possible to connect to downstream drainage pipes of various sizes by changing the inner diameter.

  The merging pipe joint connected to the main pipe part and the branch pipe part so that the receiving port of the drain pipe connecting member is displaced upward with respect to the insertion port is drained from the upstream side drain pipe and / or the drainage branch pipe. (For example, a toilet or the like) contains solid matter and is suitable for placement when it is inconvenient to reverse flow.

  Connect the receiving port of the drain pipe connection member to the main pipe part so as to be displaced downward with respect to the insertion port, and bias the reception port of the drain pipe connection member upward with respect to the insertion port. The joint pipe joint connected to the branch pipe part is a case where miscellaneous drainage (for example, a bathroom or a washroom) containing almost no solid material flows into the upstream drainage pipe and the drainage branch pipe. Suitable for placement where there is no problem. This junction pipe joint has no step between the main pipe part and the upstream drainage pipe, so the level rise of the upstream drainage pipe can be kept to a minimum (gradient), and piping under the floor can be extended. Become.

  Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

  1 is an exploded perspective view of a joint pipe joint according to an embodiment of the present invention, FIG. 2 is a plan sectional view of the joint, and FIG. 3 is a front exploded sectional view of the joint (along line AA in FIG. 1). 4 is a front sectional view when a step is provided in the main pipe portion of the joint, FIG. 5 is a right side view when a step portion is provided in the main pipe portion and the branch pipe portion of the joint, and FIG. A right side view when a step portion is provided only in the branch pipe portion of the joint, and FIG. 7 is a plan view of an example in which the joint is piped.

  The joining pipe joint of the present invention shown in FIG. 1 is a pipe joint comprising a main pipe part 1, a branch pipe part 2, a drain pipe connecting member 3, and a drain pipe connecting member 4, and the material of this joining pipe joint is not particularly limited. However, molding with a thermoplastic synthetic resin such as polyvinyl chloride or polyethylene is preferred because it has the advantage of forming a merged pipe joint excellent in strength, corrosion resistance, durability, dimensional system, and the like. In addition, the synthetic resin of the material may be an opaque blend, but it can be seen through the inside of the merging pipe joint by using a colorless and transparent blend containing no pigment or a colored transparent blend. It is desirable from the viewpoint of bonding work and inspection work.

The main pipe portion 1 is a cylindrical body having a diameter of about 120 mm and a length of about 350 mm to 400 mm. As shown in FIG. 2, a cylinder in which a drain pipe connecting member 3 is internally fitted at the upstream end thereof. An upstream connection port 1a having a larger circular diameter than the body is formed.
In addition, without forming the upstream connection port 1a, the inner diameter of the insertion port 3b of the drain pipe connection member 3 is enlarged, and the main body 1 is inserted into the insertion port 3b by inserting the cylindrical body of the main tube unit 1 into the insertion port 3b. The drain pipe connecting member 3 may be connected.

The branch pipe part 2 projecting obliquely from the side of the main pipe part 1 is a cylindrical body having the same diameter as that of the main pipe part 1, and is bent toward the main pipe part 1 at the upstream side as shown in FIG. And is formed so as to be parallel to the main pipe portion 1. Further, similarly to the main pipe portion 1, an upstream connection port 2 a into which the drain pipe connection member 3 is fitted is formed at the upstream end portion of the branch pipe portion 2. This branch pipe part 2 protrudes from the side of the main pipe part 1 within a range where the angle θ of the center line CL2 of the branch pipe part 2 with respect to the center line CL1 of the main pipe part 1 is 25 ° or more and less than 45 °. It is preferable that the angle θ is less than 25 °, because the total length of the merging pipe joint becomes too long and a considerable piping space is required. In addition, when the angle θ is 45 ° or more, the temporary water storage space P formed at the joining portion of the main pipe portion 1 and the branch pipe portion 2 is completely equal, and a large amount of water is simultaneously supplied to the main pipe portion 1 and the branch pipe portion 2. If drainage flows in, it will be clogged in the merging pipe joint and the trapped water of each water facility may be destroyed, and the lateral width of the merging pipe joint becomes too wide, so the angle θ is 25 ° or more, 45 ° It is preferable to set to less than. In particular, the confluence pipe joint with this angle θ of 30 ° has the best balance between the overall length, the capacity of the water storage space P and the level difference L (which can prevent backflow at about 3 cm), and can be installed even in a small space without worrying about blockage. This is preferable because backflow can be prevented.
Similarly to the main pipe part 1 described above, the cylindrical body of the branch pipe part 2 is formed by expanding the inner diameter of the insertion port 3b of the drain pipe connection member 3 without forming the upstream connection port 2a of the branch pipe part 2. Needless to say, the branch pipe portion 2 and the drainage pipe connecting member 3 may be connected by inserting them into the insertion opening 3b.

  As shown in FIG. 2, the main pipe portion 1 and the branch pipe portion 2 are formed separately from the connection ports 1 a and 2 a to the flange 8, and the main pipe portion 1 and the branch pipe portion 2 on the downstream side of the flange 8. The flanges 8 and 8 are overlapped and joined with a bolt 8a. This is because it is easier to form and the transportability is better when the two parts are divided. Of course, the main pipe part 1 and the branch pipe part 2 may be formed integrally. In this embodiment, the flanges 8 are overlapped and joined with the bolts 8a, but it goes without saying that they may be joined with an adhesive or the like.

  Further, in order to check the inside of the pipe joint, an inspection port may be provided at the upper ends (downstream from the flange 8) of the main pipe portion 1 and the branch pipe portion 2, but as shown in FIG. When the inspection port 9 is connected in the middle of 7, the junction pipe joint of the present invention rotates the center line CL1 of the main pipe part 1 by 180 ° so that the branch pipe part 2 is located on the left side when viewed from the downstream side. Therefore, the drainage branch pipe 6 can be used regardless of whether it is located on the left or right side of the main pipe portion 1. Therefore, the cost can be reduced by using the dual-use type, and it is not necessary to use different pipe joints depending on the construction location, so that the response at the construction site is simplified.

  The drain pipe connection member 3 connected to the upstream side connection ports 1a and 2a of the main pipe part 1 and the branch pipe part 2 is at one end (upstream side end) as shown in FIGS. A small-diameter receiving port 3a for connecting the upstream drain pipe 5 (VU75 having a nominal diameter of 75 mm) is formed, and a large-diameter insertion port to be inserted into the upstream connection ports 1a, 2a at the other end (downstream end). 3b is formed. The center line CL3a of the receiving port 3a is formed to be deviated with respect to the center line CL3b of the insertion port 3b. As shown in FIG. 3, the receiving port 3a is deviated downward to connect the upstream connection port 1a. When connected to, no step is formed between the upstream drain pipe 5 and the main pipe portion 1. On the other hand, when the drainage pipe connecting member 3 is rotated 180 ° around the center line CL3a and connected to the upstream side connection port 1a from this state, as shown in FIG. 4, the upstream side drainage pipe 5 and the main pipe portion 1 are prevented from backflow. Step L is formed. As described above, the receiving port 3a of the drain pipe connecting member 3 is displaced downward to be connected to the upstream connecting port 1a and / or the upstream connecting port 2a, or is displaced upward to be connected to the upstream connecting port 1a or / And by connecting to the upstream connection port 2a, as shown in FIG. 5, a step L can be provided between the upstream drain pipe 5 and the main pipe section 1 and between the drain branch pipe 6 and the branch pipe section 2. However, as shown in FIG. 6, a step L can be provided only between the drainage branch pipe 6 and the branch pipe portion 2. Further, it goes without saying that no step is provided in both the main pipe portion 1 and the branch pipe portion 2 or a step L can be provided only between the upstream drain pipe 5 and the main pipe portion 1 depending on the installation location. .

On the other hand, the drain pipe connecting member 4 connected to the downstream end of the main pipe portion 1 has a downstream end portion of the main pipe portion 1 at one end (upstream end) as shown in FIGS. A large-diameter fitting port 4b for externally fitting is formed, and a small-diameter connecting port 4a for connecting the downstream drain pipe 7 (VU75) to the other end (downstream side end) is formed to be displaced downward. ing. By forming the connection port 4a of the drainage pipe connecting member 4 so as to be displaced downward, the bottom surface of the flow path from the upstream drainage pipe 5 to the downstream drainage pipe 7 through the junction pipe joint is flush with the upstream side. The wastewater that has flowed in from the side drainage pipe 5 and the drainage branch pipe 6 flows out smoothly to the downstream side drainage pipe 7 without disturbing the flow of the drainage at the joint of the connection points.
When the downstream drain pipe 7 has a large pipe diameter such as the VU 100 having a nominal diameter of 100 m, the drain pipe connecting member 4 is not connected, and the VU 100 is connected to the downstream end of the main pipe section 1 via the VU 100 socket. It can also be directly connected.

  As shown in FIG. 7, the merging pipe joint as described above is disposed in the underfloor piping space inside the foundation 20 of the house, and the upstream drain pipe 5 is connected to the main pipe portion 1 via the drain pipe connecting member 3. A drainage branch pipe 6 is connected to the branch pipe portion 2 via a drainage pipe connection member 3. On the other hand, the downstream end of the main pipe 1 is connected to the downstream drain pipe 7 via the drain pipe connecting member 4, and the downstream drain pipe 7 is connected to the swirl flow generating joint 10. An inspection port 9 is connected in the middle of the downstream drainage pipe 7 so that the inside of the pipe can be inspected from the inspection port 9. A large bend pipe 11 is connected to the swirl flow generating joint 10, and the large bend pipe 11 is connected to a foundation through drainage pipe 12 that penetrates the foundation 20. The downstream end of the foundation through drain pipe 12 is connected to an outdoor drain pipe 14 via a swirling drainage tank 13. Since the swirling flow generating joint 10 and the swirling flow type drainage basin 13 prevent a blockage by generating a swirling flow, the combined pipe joint according to the present invention prevents the blockage, thereby ventilating the underfloor pipe. Is ensured, and the water seal of each water equipment trap is surely prevented.

At this time, if miscellaneous wastewater containing almost no solid matter such as a bathroom or a washroom flows into the upstream drainage pipe 5 and the drainage branch pipe 6, it is special even if the drainage flows backward to the upstream side of the upstream drainage pipe 5. Since there is no problem, as shown in FIG. 6, the receiving port 3a of one drain pipe connecting member 3 is displaced downward and connected to the upstream side connecting port 1a of the main pipe portion 1, and the other drain pipe connecting member The third receiving port 3a may be displaced upward and connected to the upstream connection port 2a of the branch pipe part 2. Since the level difference L is provided between the drainage branch pipe 6 and the branch pipe part 2, the backflow of drainage to the branch pipe part 2 can be prevented. When the drainage pipe connecting members 3 and 3 are connected in this manner, the height difference of the upstream drainage pipe 5 can be suppressed to the minimum (gradient), so that the upstream drainage pipe 5 can be extended.
If there is no need to extend the upstream drain pipe 5, as shown in FIG. 5, the outlets 3a and 3a of the drain pipe connecting members 3 and 3 are displaced upward so that the upstream connection 1a, It is more preferable to connect to 2a and to provide a level difference L because it is possible to prevent unnecessary backflow of drainage, and when it becomes necessary to extend the piping due to home renovation, one drainage pipe connecting member 3 as described above The receiving port 3a is displaced downward and connected to the upstream connection port 1a of the main pipe part 1, and the receiving port 3a of the other drain pipe connection member 3 is displaced upward and connected to the upstream side of the branch pipe part 2 What is necessary is just to make it connect to the opening | mouth 2a.

  On the other hand, when sewage containing solids such as a toilet flows into the upstream drain pipe 5 and / or the drain branch pipe 6, it is necessary to prevent backflow in both the main pipe section 1 and the branch pipe section 2. As shown in FIG. 5, the receiving ports 3a and 3a of the drain pipe connecting members 3 and 3 are displaced upward and connected to the upstream connecting ports 1a and 2a. When the drainage pipe connecting member 3 is connected in this way, the step L is provided, so that backflow of drainage can be reliably prevented. Further, when a merging pipe joint is further arranged on the downstream side of the merging pipe joint into which the sewage flows, the backflow needs to be prevented, so that the outlets 3a and 3a of the drain pipe connecting members 3 and 3 are located upward. To be connected to the upstream connection ports 1a and 2a.

  As is clear from the above description, the joining pipe joint of the present invention can be arbitrarily selected to provide or not provide the step L only by changing the connection method of the drain pipe connecting member 3. It can easily cope with the construction site. Therefore, the pipe under the floor can be extended without providing the step L at the place where it is not necessary to prevent the backflow. Moreover, since the temporary water storage space P is formed in the junction part of the main pipe part 1 and the branch pipe part 2, there exists a remarkable effect that there is no fear of obstruction | occlusion like the conventional drainage pipe joint.

It is a disassembled perspective view of the merge pipe joint which concerns on one Embodiment of this invention. It is a plane sectional view of the joint. It is a front exploded sectional view (sectional view which met an AA line of Drawing 1) of the joint. It is front sectional drawing when a level | step difference is provided in the main pipe part of the joint. It is a right view when a level | step difference is provided in the main pipe part and branch pipe part of the joint. It is a right view when a level | step difference is provided only in the branch pipe part of the joint. It is a top view of an example which carried out piping construction of the joint.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main pipe part 1a Upstream side connection port CL1 Center line 2 Branch pipe part 2a Upstream side connection port CL2 Center line 3 Drainage pipe connection member 3a Receptacle CL3a Centerline 3b Insertion port CL3b Centerline 4 Drainage pipe connection member 4a Connection port 4b fitting Joint port 5 Upstream drain pipe 6 Drain branch pipe 7 Downstream drain pipe L Step

Claims (6)

A main section;
A branch pipe portion projecting obliquely from the side of the main pipe portion so as to have an angle of 25 ° or more and less than 45 ° with respect to the center line of the main pipe portion;
The center line of the receiving port connecting the upstream drain pipe is a junction pipe joint composed of a drain pipe connecting member formed offset from the center line of the insertion port,
A junction pipe joint, wherein an insertion port of a drain pipe connecting member is connected to upstream ends of a main pipe part and a branch pipe part, respectively.   The merging pipe joint according to claim 1, wherein the branch pipe portion is provided so as to project at an angle of 30 ° with respect to the center line of the main pipe portion.   The junction pipe joint according to claim 1 or 2, wherein the branch pipe part is bent so as to be parallel to the main pipe part on the upstream side.   4. A drain pipe connecting member formed by shifting a connection port for connecting a downstream drain pipe downward is connected to the downstream end of the main pipe section. Confluence pipe joint according to the above.   The receiving port of the drain pipe connecting member is connected to the main pipe portion and the branch pipe portion so as to be displaced upward with respect to the insertion port, respectively. Merge pipe fitting.   Connect the outlet of the drainage pipe connecting member to the main pipe so as to be displaced downward with respect to the insertion port, and make the outlet of the drainage pipe connection member offset upward with respect to the insertion port. The junction pipe joint according to any one of claims 1 to 4, wherein the joint pipe joint is connected to a branch pipe part.

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