JP4693672B2 - Joint joint - Google Patents

Description

  The present invention relates to a merging joint. More specifically, the present invention relates to a junction joint that can be used to join drainage generated in a plurality of facilities such as indoors.

The drainage equipment installed under the floor of an apartment house or the like generally has piping as shown in FIG. And as the junction joint 50 used for these underfloor drainage facilities, there exists a junction joint known in the industry as 45Y, 90Y, large bend Y, etc. However, in any one joint, one joint branch pipe 52 is formed on the joint main pipe 51, and only one drainage branch channel 54 is connected to the drainage main channel 53. Yes.
When the junction joint 50 provided with only one joint branch pipe 52 is used, for example, from the drainage main flow path 53 from the toilet T, from a sanitary facility such as the kitchen K, the washroom S, the bathroom B, the laundry W, etc. When the drainage branch channel 54 is connected by the above-described junction joint 50, the junction joint 50 corresponding to the number of sanitary appliances is required on the drainage main channel 53, and complicated piping such as a circled portion in FIG. There is a problem that the portion is easily generated, and the drainage equipment (drainage pipe) under the floor becomes complicated by the joint.
In the case where a sanitary instrument is installed in a direction perpendicular to the flow direction of the drainage main flow channel 53, the drainage branch flow channel 54 is returned to avoid a problem due to a right angle merge to the drainage main flow channel 53. It was necessary to connect by piping.
On the other hand, pipe joints disclosed in Design Registration No. 503863 (Patent Document 1) and Japanese Patent Application Laid-Open No. 2005-2651 (Patent Document 2) are disclosed as joints provided with a pair of joint branch pipes on both sides of the joint main pipe. ing.
Design Registration No. 503863 Japanese Patent Laying-Open No. 2005-2651

However, the joint shown in Patent Document 1 is a so-called large-bending joint branch pipe connected to the joint main pipe from both the left and right sides, and there is a problem that the joint becomes larger and bulky in the left and right side directions. . In addition, when drainage merges from the left and right joint branch pipes, the flow of drainage from the left and right largely collides in the direction crossing the joint main pipe, causing a problem of hindering smooth flow.
Further, in the case of the joint shown in Patent Document 2, a straight joint pipe is attached, but since the branch angle of the joint branch pipe with respect to the joint main pipe is large, drainage flowing from the left and right joint branch pipes is also generated. There remains a problem that the joints are likely to collide greatly in the direction crossing the main pipe.
As shown in FIG. 3 of Patent Document 2, in the case where the drift guides 14B and 15B are provided, it is possible to reduce the collision of drainage flowing from the left and right joint branch pipes. As a result, the diameter at the merging port is narrowed, and there is a problem of hindering smooth merging. In addition, there is a problem that the branch pipe channel is blocked with drainage and the air passage is easily blocked.

Therefore, the present invention solves the above-described problems in the prior art, and can eliminate the need for complicated piping in drainage equipment such as under the floor, and eliminates the need for complicated piping such as return piping. It is an object of the present invention to provide a merging joint that can be rationalized, reduce the number of merging joints used, and reduce costs.
Further, according to the present invention, in the joint joint provided with a pair of joint branch pipes on both sides of the joint main pipe, the joint joint can be reduced in size and space-saving, and the waste water flowing from the joint branch pipes on both sides can be reduced. It is an object of the present invention to provide a junction joint that can smoothly merge and flow downstream without stagnation.

The merging joint of the present invention for achieving the above object is a merging joint formed by branching a pair of joint branch pipes to both sides of the joint main pipe, and each of the pair of joint branch pipes is a straight pipe. And the branch angle of the joint branch pipe with respect to the joint main pipe is regulated so that the extension line of the flow path of the joint branch pipe does not overlap the flow path of the other joint branch pipe. One feature.
In addition to the first feature, the junction joint of the present invention has a second feature that a pair of joint branch pipes on both sides of the joint main pipe are branched at the same angle.
In addition to the first or second feature described above, the joint joint according to the present invention is configured such that the joint branch pipe is configured to have a size that falls within the thickness range and the longitudinal range of the joint main pipe. It is a feature.
In addition to the third feature, the junction joint of the present invention has a configuration in which the flow path axis of the joint branch pipe is eccentric above the flow path axis of the joint main pipe when arranged horizontally. This is the fourth feature.
In addition to the first to fourth features described above, the junction joint of the present invention has a fifth feature that the joint main pipe is provided with an inspection opening for checking the inside of the pipe.
In addition to the first to fifth features, the junction joint of the present invention has a sixth feature that the joint branch pipe is provided with a connecting means to the flexible pipe.
In addition to the features of any one of the first to sixth aspects, the junction joint of the present invention uses a joint main pipe as a joint of a drainage main flow path as a joint of a drainage pipe installed under the floor of a building. A seventh feature is that the branch pipe is used as a joint for joining another drainage branch channel to the drainage main channel.
In addition to the above-described first to seventh features, the joint joint of the present invention has a pipe diameter ratio ds / dl of 75% or more between the pipe diameter ds of the joint branch pipe and the pipe diameter dl of the joint main pipe. The eighth feature is that the branch angle of the joint branch pipe with respect to the joint main pipe at that time is 40 degrees or less and 20 degrees or more.

According to the merging joint of the first aspect, since the pair of joint branch pipes that branch from the joint main pipe to both sides face each other is a straight pipe, the spread to both sides is made smaller than that of the large bending joint joint. be able to.
In addition, by restricting the branch angle of the joint branch pipe to the joint main pipe so that the extension line of the joint branch pipe flow path does not overlap the flow path of the other joint branch pipe, the dimension in the longitudinal direction of the joint joint is Although it is a little longer, the dimension in the width direction (both sides) can be shortened appropriately, and it is possible to sufficiently prevent the joint joint from becoming bulky in the width direction, and to ensure good space saving in underfloor piping etc. Can do. In addition, it is possible to sufficiently reduce the collision phenomenon caused by the large overlap of the inflow and drainage from the left and right joint branch pipes that could not be resolved by the conventional joint joint, and the branches joined from both sides can be reduced. The drainage can flow smoothly downstream with the main drainage without stagnation and without causing large turbulence.

  According to the merging joint of the second aspect, in addition to the effect of the configuration of the first aspect, the pair of joint branch pipes on both sides of the joint main pipe are branched at the same angle, so that the merging joint Can be made completely symmetrical, and can be used without worrying about the difference between right and left during construction.

  According to the merging joint according to the third aspect, in addition to the effect of the configuration according to the first or second aspect, the joint branch pipe is configured to have a size that fits within a thickness range and a longitudinal range of the joint main pipe. Therefore, even if the joint branch pipe is present, the joint joint does not become bulky in the thickness direction and the length direction, and can be used in a compact and space-saving manner. In particular, it is possible to easily perform piping even in a portion having a small thickness space such as under the floor. Of course, since the joint main pipe has a pipe diameter larger than that of the joint branch pipe, it is possible to prevent a situation in which the main pipe is blocked with drainage and the ventilation is blocked.

  According to the merging joint according to the fourth aspect, in addition to the effect of the configuration according to the third aspect, the flow axis of the joint branch pipe is more than the flow axis of the joint main pipe when arranged horizontally. Since it is also configured to be eccentric upward, the merging from the joint branch pipe to the joint main pipe can be performed more smoothly with a drop, and more reliably preventing the backflow of drainage from the joint main pipe to the joint branch pipe. it can.

  According to the merging joint according to claim 5, in addition to the effect of the configuration according to any one of claims 1 to 4, the joint main pipe is provided with an inspection opening for inspecting the inside of the pipe. The inside of the joint joint can be easily inspected visually.

  According to the merging joint according to the sixth aspect, in addition to the effect of the structure according to any one of the first to fifth aspects, the joint branch pipe is provided with the connecting means with the flexible pipe. The branch flow path can be constituted by a flexible tube to constitute a drainage facility such as under the floor. Therefore, the positional flexibility of the joining of the drainage branch channel with respect to the drainage main channel is large, and a smooth channel can be realized by eliminating the bent portion in the drainage branch channel, and the drainage can be smoothly performed without clogging of the pipe.

  According to the merging joint according to claim 7, in addition to the effect of the configuration according to any one of the above claims 1 to 6, the merging joint of the present invention is a joint of a drainage pipe installed under the floor of a building, The joint main pipe is used as a joint for the drainage main flow path, and the joint branch pipe is used as a joint for joining another drainage branch flow path to the drainage main flow path. The number of joints used can be halved by merging from both sides instead of from one side of the tube. In addition, it is possible to install the drainage facility under the floor in a space-saving manner without complicating the piping of the drainage branch flow path or performing return piping.

  According to the merging joint according to the eighth aspect, in addition to the effect of the structure according to any one of the first to seventh aspects, the pipe diameter ratio ds / dl between the joint branch pipe and the joint main pipe is 75% or more. Therefore, the drainage from the drainage branch channel can be joined to the joint main pipe without clogging the joint branch pipe. In addition, the branch angle of the joint branch pipe to the joint main pipe is 40 degrees or less, so that the pipe diameter ratio ds / dl between the joint branch pipe and the joint main pipe has a nominal diameter of 75% or more, That is, for almost all standard products used in the industry, it is possible to provide a joint in which the extension line of the flow path of one joint branch pipe does not overlap the flow path of the other joint branch pipe. Therefore, it is possible to sufficiently eliminate the collision of the waste water flowing in from the joint branch pipes on both sides, and it is possible to prevent the stagnation of the flow and the generation of turbulent flow and smoothly merge and flow down. In addition, by setting the branch angle to 20 degrees or more, the joint branch pipe can be branched from the joint main pipe while maintaining the dimension in the longitudinal direction of the joint to an appropriate dimension, and the function of the junction joint can be retained. .

A merging joint according to an embodiment of the present invention will be described with reference to the following drawings.
FIG. 1 is a plan view showing an aspect in which a junction joint according to an embodiment of the present invention is used for an underfloor piping facility in a building, FIG. 2 shows a first embodiment of the junction joint, (A) is a front view, (B ) Is a plan view, and (C) is a left side view. FIG. 3 is a plan view showing a modification of the junction joint according to the first embodiment. 4A and 4B show a second embodiment of the junction joint, where FIG. 4A is a front view, FIG. 4B is a plan view, and FIG. 4C is a left side view. 5A and 5B show a third embodiment of the junction joint, where FIG. 5A is a front view, FIG. 5B is a cross-sectional view, and FIG. 5C is a left side view. FIG. 6 is a view for explaining dimensional conditions of the junction joint according to the embodiment of the present invention.

With reference to FIG. 1, the example of the aspect in which the junction joint of this invention was used for the underfloor piping installation of a building is shown. The underfloor piping facility is composed of a main drainage channel 2 and a drainage branch channel 3 joined to the drainage branch channel 3, and the junction joint 1 is arranged at the junction of the drainage branch channel 3. The junction joint 1 connects the drainage main flow path 2 by the joint main pipe 10, and connects the drainage branch flow paths 3 from both sides by a pair of joint branch pipes 20, 20 branched to both sides of the joint main pipe 10.
In this embodiment, the drainage flow path starting from the toilet T is used as the drainage main flow path 2 as the floor drainage piping system for domestic wastewater, and the drainage from the water facilities other than the toilet T, that is, the drainage from the kitchen K, the washroom S The drainage branch 3 is a flow path for drainage from the bathroom, drainage from the bathroom B, and drainage from the laundry W. By making the drainage from the toilet T into the drainage main flow path 2, it is difficult for the piping to be clogged with solid matter in the drainage from the toilet T, and the drainage main flow path 2 can be washed away by a large amount of drainage from the toilet T. it can.
In particular, in the present embodiment, a flexible pipe is used for the drainage branch flow path 3 of the underfloor piping facility, and is directly connected to the joint branch pipe 20 of the junction joint 1 in a state where the degree of freedom of the connection position is increased. As a result, it is possible to realize the drainage branch channel 3 as a smooth channel without a bent portion.

Referring to FIG. 2, the merging joint 1 of the first embodiment has a pair of joint branch pipes 20, 20 branched on both sides of the joint main pipe 10 at the same angle, and a pair of joint branch pipes 20, The 20 flow path shafts 20a, 20a and the flow path shaft 10a of the joint main pipe 10 are configured on the same plane. That is, in other words, the joint branch pipes 20, 20 are branched at the centers on both sides of the joint main pipe 10.
Both ends of the joint main pipe 10 are expanded in diameter as connecting portions 11 with the drainage main flow path 2. The distal end portion of the joint branch pipe 20 is expanded in diameter as a connection portion 21 with the flexible pipe of the drainage branch channel 3 and is provided with a fixing screw 21a.
In this merging joint 1, the branch angle θ is regulated so that the extension line 20 b of the flow path of each joint branch pipe 20 does not overlap the flow path of the other joint branch pipe 20.
The joint branch pipes 20 and 20 are straight pipes, and the flow path in the joint branch pipe 20 also joins the flow path in the joint main pipe 10 linearly.
The dimensions of the joint branch pipe 20 are such that the pipe diameter is smaller than the pipe diameter of the joint main pipe 10, and the joint branch pipe 20 fits within the thickness range of the joint main pipe 10. Further, the joint branch pipe 20 has a size that fits within the range of the joint main pipe 10 in the longitudinal direction. That is, the joint branch pipe 20 is configured not to protrude in the thickness direction and the longitudinal direction of the joint main pipe 10.

As shown in FIG. 3, the joint branch pipes 20, 20 provided on both sides of the joint main pipe 10 do not necessarily have to be branched at the same angle. If necessary, the right and left branch pipes 20 and 20 may be merged joints branched at different branch angles θ ₁ and θ ₂ . However, if the branch angles of the left and right joint branch pipes 20 and 20 are the same, the junction joint can be made completely symmetrical, and can be used without worrying about the difference between the left and right during construction. can do.

Referring to FIG. 4, the merging joint 1 of the second embodiment has a pair of joint branch pipes 20, 20 branched at the same angle on both sides of the joint main pipe 10, and a pair of joint branch pipes 20, Each of the 20 flow path shafts 20 a and 20 a is configured to be eccentric above the flow path shaft 10 a of the joint main pipe 10. That is, in other words, the joint branch pipes 20 and 20 are branched at positions slightly above the center on both sides of the joint main pipe 10.
The other configuration is the same as that of the first embodiment of the junction joint 1 shown in FIG. Members and elements that perform the same function are denoted by the same reference numerals and description thereof is omitted.
In the second embodiment, since the flow path shaft 20a of the joint branch pipe 20 is above the flow path shaft 10a of the joint main pipe 10, the drainage flows backward from the joint main pipe 10 to the joint branch pipe 20 side. Is more prevented. Other functions and effects are the same as those of the first embodiment.

Referring to FIG. 5, the junction joint 1 of the third embodiment is provided with an inspection opening 12 projecting from an upper portion near the center of the joint main pipe 10. Thereby, the state in the pipe of the merging joint 1 can be easily inspected visually.
Other configurations and operational effects are the same as those of the first embodiment shown in FIG. Members and elements that perform the same function are denoted by the same reference numerals and description thereof is omitted.

With reference to FIG. 6, the main pipe diameter (inner diameter) dl of the joint main pipe 10 of the merging joint 1, the branch pipe diameter (inner diameter) ds of the joint branch pipe 20, and the branching angle θ will be further described.
In order to prevent the extension line 20b of the flow path of one joint branch pipe 20 from overlapping the flow path of the other joint branch pipe 20 (downstream end 20c of the flow path), It becomes a condition.
dlcos θ ≧ ds …… Equation 1
Therefore, cos θ ≧ ds / dl... Equation 2

When the relationship of the above formula 2 is applied to standard products of each nominal diameter of the DV standard (JIS 6739) of the pipe joint 45Y, that is, standard products used in the industry, Table 1 is obtained.
Further, in Table 1, Table 2 is selected when the pipe diameter ratio ds / dl between the branch pipe diameter ds and the main pipe diameter dl is 75% or more. Here, the fact that the pipe diameter ratio ds / dl between the branch pipe diameter ds and the main pipe diameter dl is 75% or more allows the pipe diameter of the joint branch pipe 20 to be set large, so There is a merit that it is possible to preferably prevent clogging or stagnation of drainage water that is merged through the branch pipe 20. When the pipe diameter ratio ds / dl is less than 75%, the pipe diameter of the joint branch pipe 20 is smaller than that of the joint main pipe 10, and there is a possibility that prevention of confluence clogging is not sufficient.

Further, referring to FIG. 6, in the merging joint 1, a condition for allowing the joint branch pipe 20 to branch with respect to the joint main pipe 10, in other words, a partition between the joint main pipe 10 and the joint branch pipe 20. In order to make 20d possible, the length of the joint branch pipe 20 is A, and the following expressions 3 and 4 are required.
Asinθ> dl ... Formula 3
Where dl = ds / cos θ
Therefore, A> ds / sin θ · cos θ Equation 4

  The length A of the joint branch pipe 20 according to the above equation 4 is also shown in Table 2.

As is clear from Tables 1 and 2, when the pipe diameter ratio ds / dl between the branch pipe diameter ds and the main pipe diameter dl is 75% or more, the branch angle θ of the joint branch pipe 20 with respect to the joint main pipe 10 Needs to be 40 degrees or less. Thus, when the pipe diameter ratio ds / dl is 75% or more, the extension line 20b of the flow path of one joint branch pipe 20 does not overlap the flow path of the other joint branch pipe 20 (downstream end 20c of the flow path). Therefore, it is possible to sufficiently reduce the collision phenomenon caused by the large overlap of the inflow and drainage from the right and left joint branch pipes 20 and 20 that could not be eliminated by the conventional junction joint. Moreover, the branch drainage combined from both sides does not stagnate and can flow smoothly downstream along with the main drainage without causing a large turbulent flow.
Of course, by reducing the branching angle θ, it is possible to suppress the size of the merging joint 1 in the width direction (both sides), and sufficiently prevent the merging joint 1 from being bulky in the width direction. Thus, it is possible to ensure a good space saving.
However, when the branching angle is less than 20 degrees, the length necessary for the joint branch pipe 20 to branch from the joint main pipe 10 becomes long, and the longitudinal dimension of the merge joint 1 becomes too long. For this reason, the branching angle is preferably at least 20 degrees or more.

It is a top view which shows the aspect which used the junction joint which concerns on embodiment of this invention for the underfloor piping equipment of a building. A 1st embodiment of a junction joint is shown, (A) is a front view, (B) is a top view, (C) is a left view. It is a top view which shows the modification of the merge joint which concerns on the 1st Embodiment of this invention. A 2nd embodiment of a junction joint is shown, (A) is a front view, (B) is a top view, (C) is a left view. 3rd Embodiment of a junction joint is shown, (A) is a front view, (B) is sectional drawing, (C) is a left view. It is a figure explaining the dimension conditions of the confluence | merging joint which concerns on embodiment of this invention. It is a top view which shows the example of the underfloor piping installation in the past.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Joint joint 2 Drainage main flow path 3 Drainage branch flow path 10 Joint main pipe 10a Flow path shaft 11 Connection part 12 Inspection opening 20 Joint branch pipe 20a Flow path shaft 20b Extension line 20c Downstream end 20d Partition 21 Connection part 21a Fixing screw A Joint Length of branch pipe B Bathroom K Kitchen S Washroom T Toilet W Laundry space θ, θ ₁ , θ ₂ Branch angle dl Main pipe diameter ds Branch pipe diameter

Claims (8)

A joint joint formed by branching a pair of joint branch pipes to both sides of the joint main pipe, the pair of joint branch pipes each being a straight pipe, and the branch of the joint branch pipe with respect to the joint main pipe A merging joint characterized in that the angle is restricted to an angle at which the extension line of the flow path of the joint branch pipe does not overlap the flow path of the other joint branch pipe.   The merging joint according to claim 1, wherein a pair of joint branch pipes on both sides of the joint main pipe are branched at the same angle.   The joint branch pipe according to claim 1 or 2, wherein the joint branch pipe is configured to have a size that fits within a thickness range and a longitudinal range of the joint main pipe.   The merging joint according to claim 3, wherein when arranged horizontally, the flow path shaft of the joint branch pipe is offset upward from the flow path axis of the joint main pipe.   The joint according to any one of claims 1 to 4, wherein the joint main pipe is provided with an inspection opening for inspecting the inside of the pipe.   6. The junction joint according to any one of claims 1 to 5, wherein the joint branch pipe is provided with means for connecting to a flexible pipe.   The joint main pipe is used as a joint of the drainage main flow path as a joint of the drainage pipe installed under the floor of the building, and the joint branch pipe is used as a joint for joining another drainage branch flow path to the drainage main flow path. The merge joint according to any one of claims 1 to 6.   The pipe diameter ratio ds / dl between the pipe diameter ds of the joint branch pipe and the pipe diameter dl of the joint main pipe is 75% or more, and the branch angle of the joint branch pipe with respect to the joint main pipe at that time is set to 40. The merging joint according to any one of claims 1 to 7, wherein the merging joint is 20 degrees or more.

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