JP2019100363A - Branch joint unit - Google Patents

Abstract

To provide a joint unit capable of facilitating work even in a case where kinds of fluid flowing in two supply pipes are switched.SOLUTION: A branch joint unit comprises: a first branch joint having a first main pipe, and a first branch pipe branching from the first main pipe; and a second branch joint having a second main pipe, and a second branch pipe branching from the second main pipe. The first main pipe and the second main pipe extend in parallel with each other, and the first branch pipe and the second branch pipe extend in parallel with each other. The first branch pipe and the second branch pipe have an intersection portion intersecting with each other. An axial center of the first main pipe, a portion other than the intersection portion in an axial center of the second main pipe, a portion other than the intersection portion in an axial center of the first branch pipe, and an axial center of the second branch pipe are arranged on the substantially same plane. In the intersection portion, the first branch pipe is arranged at one surface side of the plane, and the second main pipe is arranged at the other surface side of the plane.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a branch joint unit.

  In order to supply cold water and hot water to a mixing faucet or the like from a supply pipe for flowing cold water and hot water respectively, for example, a T-shaped branch joint as shown in Patent Document 1 is used. In this example, a first T-shaped branch joint is connected to a first supply pipe for flowing cold water, a pipe member branched to a faucet of a mixing faucet is connected, and a second T-shaped pipe is connected to a second supply pipe for flowing hot water. The branch joint was connected, and the pipe member which branched to the hot-water tap of the mixing faucet was connected. Here, the first and second supply pipes are generally arranged in parallel. For example, when the second supply pipe is arranged on the mixing faucet side, the first T-shaped branch joint is used. The branch pipe branched from the first supply pipe is formed to extend over the second supply pipe to the mixing faucet side. For this reason, this branch pipe has an arc-shaped portion that passes over the second supply pipe.

JP 2000-71341 A

  However, the types of fluid flowing to the first supply pipe and the second supply pipe may be switched depending on the installation location. That is, cold water may flow through the first supply pipe or hot water may flow. On the other hand, in the case of the mixing faucet, the positions of the water tap and the hot water tap are often the same. In such a case, it is necessary to prepare different types of T-shaped branch joints depending on the construction site, and there is a problem that the preparation becomes complicated. The present invention has been made to solve the above problems, and it is an object of the present invention to provide a branch joint unit that can be easily installed even if the types of fluid flowing through two supply pipes are switched. .

  A branch joint unit according to the present invention includes a first main pipe and a first joint body having a first branch pipe branched from the first main pipe, a second main pipe, and a second main pipe branched from the second main pipe. A second joint body having two branch pipes, wherein the first main pipe and the second main pipe extend in parallel, and the first branch pipe and the second branch pipe extend in parallel; And an intersection portion where the first branch pipe and the second main pipe intersect with each other, and an axis of the first main pipe and a portion other than the intersection in the axis of the second main pipe A portion other than the intersection in the axis of the first branch pipe and an axis of the second branch in substantially the same plane, the first branch pipe being at the intersection The second main pipe is disposed on one side of the plane, and the second main pipe is disposed on the other side of the plane. Note that “substantially the same plane” is not limited to completely the same plane, but may be slightly displaced, for example, about several mm from there.

  In the branch joint unit, the height from the plane to the farthest outer circumferential surface of the first branch pipe and the height from the plane to the farthest outer circumferential surface of the second main pipe at the intersection portion , Can be made substantially the same.

  In the branch joint unit, the first branch pipe and the second main pipe can be fixed at the intersection portion.

  In the branch joint unit, the outer peripheral surfaces of the first branch pipe and the second main pipe can be integrated at the intersection portion.

  In the branch joint unit, one end of the first main pipe and one end of the second main pipe may be configured to be positioned at the same distance from the first branch pipe.

  In the branch joint unit, the first main pipe and the second main pipe can have the same length.

  The branch joint unit may be configured such that an end of the first branch pipe and an end of the second branch pipe are located at the same distance from the second main pipe.

  In the branch joint unit, the first joint body and the second joint body may have at least one of different indications and shapes that distinguish them.

  The branch joint unit may further include a cover that accommodates the first joint body and the second joint body, and the cover is in the extending direction of the first main pipe and in the extending direction of the first branch pipe. The height in the direction orthogonal to both can be made constant.

  According to the branch joint unit according to the present invention, installation can be easily performed even if the types of fluid flowing through the two supply pipes are interchanged.

It is a top view showing one embodiment of a branching joint unit concerning the present invention. It is the figure which looked at the branch coupling unit of FIG. 1 from the upper side. It is the figure which looked at the branch coupling unit of FIG. 1 from lower side. It is the figure which looked at the branch coupling unit of FIG. 1 from the right side. It is the figure which looked at the branch coupling unit of FIG. 1 from the left side. It is the BB sectional drawing of FIG. It is the sectional view on the AA line of FIG. It is a top view which shows an example of the usage method of the branch coupling unit of FIG. It is a top view which shows the other example of the usage method of the branch coupling unit of FIG. It is a side view explaining the effect of the branch joint unit of FIG. It is a top view which shows the other example of the branch coupling unit which concerns on this invention. It is the CC sectional view taken on the line of FIG. It is a top view which shows the other example of the branch coupling unit which concerns on this invention. It is a top view which shows the other example of the branch coupling unit which concerns on this invention. It is a top view which shows the example of the branch coupling unit of this invention which shows the state which isolate | separated the 1st T-shaped coupling (a) and the 2nd T-shaped coupling (b). FIG. 16 is a cross-sectional view of a branch joint unit in which the first T-shaped joint and the second T-shaped joint in FIG. 15 are combined, taken along the line A-A in FIG. 1. FIG. 16 is a cross-sectional view of a branch joint unit in which the first T-shaped joint and the second T-shaped joint in FIG. 15 are combined, taken along the line B-B in FIG. 1.

  Hereinafter, one embodiment of a branch joint unit concerning the present invention is described, referring to drawings. 1 is a plan view of this branch joint unit, FIG. 2 is a view of the branch joint unit of FIG. 1 viewed from the upper side, FIG. 3 is a view of the branch joint unit of FIG. 5 is a view of the branch joint unit of FIG. 1 as viewed from the left side, FIG. 6 is a cross-sectional view of FIG. 1 taken along the line B-B, FIG. It is A line sectional drawing.

<1. Structure of branch joint unit>
As shown in FIG. 1, this branch joint unit has a cylindrical first main pipe 1 and a second main pipe 2 extending in parallel, and these two main pipes 1 and 2 have the same length. It has become. Here, the direction in which the first main pipe 1 and the second main pipe 2 extend is referred to as a first direction. The left end of each main pipe 1, 2 is referred to as a first end 11, 21 and the right end of each main pipe 1, 2 is referred to as a second end 12, 22. The first ends 11 and 21 and the second ends 12 and 22 of the first main pipe 1 and the second main pipe 2 are disposed at the same position in the first direction. That is, the positions of the first ends 11 and 21 and the positions of the second ends 12 and 22 are aligned.

  Further, in the middle of the first main pipe 1, a cylindrical first branch pipe 3 is connected so as to be orthogonal to each other, and constitutes a first T-shaped joint (first branch joint) 10. That is, the internal space of the first main pipe 1 and the internal space of the first branch pipe 3 communicate with each other. More specifically, the first branch pipe 3 is disposed on the second end 12 side of the first main pipe 1, intersects the second main pipe 2, and extends over the second main pipe 2. .

  Similarly, in the middle of the second main pipe 2, a cylindrical second branch pipe 4 is connected so as to be orthogonal to one another, and a second T-shaped joint (second branch joint) 20 is configured. That is, the internal space of the second main pipe 2 and the internal space of the second branch pipe 4 communicate with each other. More specifically, the second branch pipe 4 is disposed on the first end 21 side of the second main pipe 2 and extends in parallel to the first branch pipe 3. Hereinafter, the direction in which both the branch pipes 3 and 4 extend will be referred to as a second direction. And the end parts 31 and 41 of both the branch pipes 3 and 4 are arrange | positioned in the same position in a 2nd direction. The distance between the axes of the first main pipe 1 and the second main pipe 2 and the distance between the axes of the first branch pipe 3 and the second branch pipe 4 may be substantially the same.

  In the configuration as described above, as shown in FIGS. 2 to 5, a portion other than the intersection of the axial center X1 of the first main pipe 1 and the axial center X2 of the second main pipe 2, the axis of the first branch pipe 3 A portion other than the intersection portion in the center X3 and the axial center X4 of the second branch pipe 4 are arranged to be located in the same plane. Hereinafter, this plane will be referred to as a reference plane S.

  Next, the intersection portion 50 of the first branch pipe 3 and the second main pipe 2 will be described with reference to FIGS. 6 and 7. First, as shown in FIGS. 6 and 7, a direction orthogonal to both the first direction and the second direction will be referred to as a third direction. The first branch pipe 3 and the second main pipe 2 are fixed so that their outer peripheral surfaces are in contact with each other at the intersection portion 50. The first branch pipe 3 protrudes so as to be convex in an arc shape on one side in the third direction (right side in FIG. 7) at the intersection portion 50. On the other hand, the second main pipe 2 protrudes so as to be convex in an arc shape on the other side (the lower side in FIG. 6) in the third direction at the intersection portion 50. Further, at the intersection portion 50, the protrusion height Z1 of the first branch pipe 3 from the reference surface S and the protrusion height Z2 of the second main pipe 2 from the reference surface S are the same.

  In addition, at the intersection portion 50, the fixed portion of the first branch pipe 3 and the second main pipe 2 functions as a common wall 30 of both the pipes 2 and 3. However, this common wall 30 is smaller than twice the wall thickness of the wall of the other part of the first branch pipe 3 and the wall of the other part of the second main pipe 2. For example, when the wall thickness of the first branch pipe 3 and the second main pipe 2 is 3 mm, the wall thickness of the common wall 30 of the intersection portion 50 can be 4 mm. The wall thickness of the common wall 30 is not less than the wall thickness of the non-common wall such as the wall thickness of the first branch pipe 3 and the second main pipe 2 in order to have the minimum strength and to reduce the heat conductivity as much as possible. Preferably there.

  Connecting members 6 are attached to both ends of the main pipes 1 and 2 and ends of the branch pipes 3 and 4 respectively. The structure of the connecting member 6 is not particularly limited, but the pipe member can be detachably or irremovably connected by a known structure such as a screw-in type or a plug-in type. Moreover, these connection members 6 can be replaced | exchanged suitably according to the diameter of the pipe member to connect. Therefore, the outer diameter of the connecting member 6 connecting the large diameter tube members is increased, and the outer diameter of the connecting member 6 connecting the small diameter tube members is reduced. In the present embodiment, a screw-in type connection member 6 which can not be removed by one touch is mainly illustrated. However, in some drawings (for example, FIGS. 15 to 17 and the like), a removable plug-in type The connecting member 6 may be shown.

  The branched joint unit configured as described above can be formed of, for example, a thermoplastic resin material such as an olefin based material as well as a metal material such as bronze (such as CAC 406) and brass. Moreover, you may mix these.

  Moreover, although a branch joint unit can be manufactured by various methods, it can be integrally molded by casting, for example. Thus, the first T-shaped joint 10 and the second T-shaped joint 20 are completely integrated at the intersection portion 50. In addition, the first T-shaped joint 10 and the second T-shaped joint 20 may be separately formed by casting or the like, and may be integrated by bonding or welding where they should be intersections. In addition, as described above, molding can also be performed using a resin material.

<2. How to Use Branch Joint Unit>
In the branch joint unit according to the present embodiment, for example, as shown in FIG. 8, when the supply pipes 7 and 8 for flowing hot and cold water respectively are arranged in parallel, they are branched from there and a mixing faucet (not shown) ) Can be used when supplying hot and cold water. First, the connection members 6 at both ends of the first main pipe 1 are connected to each other in the middle of the supply pipe 7 through which cold water flows. Subsequently, the connecting members 6 at both ends of the second main pipe 2 are connected in the middle of the supply pipe 8 through which the hot and cold water flows. Subsequently, the pipe member 91 connected to the water faucet of the mixing faucet is connected to the connecting member 6 at the end of the first branch pipe 3, and the connecting member 6 at the end of the second branch 4 is mixed. The pipe member 92 connected with the hot water tap of the faucet is connected.

  Thereby, cold water branches from the supply pipe 7 which pours cold water through the 1st main pipe 1, and cold water is supplied to a faucet through the 1st branch pipe 3. As shown in FIG. Further, the hot water is branched from the supply pipe 8 through which the hot water flows through the second main pipe 2, and the cold water is supplied to the hot water supply tap through the second branch line 4.

  <3. Feature>

(1) The mixing faucet is generally provided with a hot water supply tap on the left side and a water supply faucet on the right side. On the other hand, as for the supply pipes 7, 8, as in the present embodiment, the supply pipe 7 for cold water is arranged at the upper side and the supply pipe 8 for hot water is arranged at the lower side. It can be the opposite. In this case, the branch joint unit according to the present embodiment is as shown in FIG. 9 when the surface facing the mounting surface K is turned over from the state of FIG. That is, as shown in the same figure, the first branch pipe 3 branched from the first main pipe 1 is disposed on the left side, and the hot and cold water flowing through the first main pipe 1 passes through the first branch pipe 3 to the left side of the mixing faucet. It is supplied to the hot water supply tap. On the other hand, the second branch pipe 4 branched from the second main pipe 2 is disposed on the right side, and the cold water flowing through the second main pipe 2 is supplied to the right faucet of the mixing faucet via the second branch pipe 4 Ru. Therefore, even if the types of water flowing through the supply pipes 7, 8 are replaced with each other, that is, even if the cold water and the hot water are replaced, the arrangement of the supply pipes 7, 8 can be easily coped with simply by turning over the branch joint unit.

(2) In the said embodiment, as shown in FIG.6 and FIG.7, axial center X1-X4 of each pipe | tube 1-4 exists on the same plane (reference plane S), and the 1st branch pipe 3 and the 2nd At the intersection 50 with the main pipe 2, the protruding height Z1 from the reference plane S of the axial center X3 of the first branch pipe 3 and the protruding height Z2 from the reference plane of the axial center X2 of the second main pipe 2 are It is the same. Therefore, as described above, even if the branch joint unit is turned over, the heights (heights of the reference surfaces S) of the axial centers X1 to X4 of the pipes from the mounting surface K do not change. Therefore, there is no need to change the positions of the supply pipes 7, 8 and the pipe members 91, 92 connected to the branch joint unit in the third direction.

(3) Further, as shown in FIG. 10, since the configuration is as described in (2) above, as long as the diameter of the connecting member 6 is smaller than the height H of the intersection portion 50 in the third direction Even if the connecting member 6 of such a diameter is attached, the height H in the third direction of the branch joint unit from the mounting surface K does not change. For example, as shown in FIG. 10 (a), even if the connecting member 6 having a small diameter is used or the connecting member having a large diameter as shown in FIG. 10 (b), the branch joint unit H from the mounting surface K The heights of the axial centers X1 to X4 of each tube (the height of the reference surface S) do not change either. Therefore, there is no need to change the positions of the supply pipes 7, 8 and the pipe members 91, 92 connected to the branch joint unit in the third direction. Moreover, since the protrusion amount to the 3rd direction of the 2nd main pipe 2 and the 1st branch pipe 3 will become small if comprised in this way, the flow of water can be made smooth and the influence of the fall of the flow velocity etc. It can be made smaller.

(4) In the branch joint unit, the first ends 12, 21 of the main pipes 1, 2 are disposed at the same position in the first direction. Therefore, in order to connect the supply pipes 7, 8 to the first ends 12, 21 of both the main pipes 1, 2 of this branch joint unit, the length of the supply pipe 7 connected to the first main pipe 1 is checked. For example, it is not necessary to confirm the length of the supply pipe 8 connected to the second main pipe 2. That is, if the supply pipe 8 having the same length as the supply pipe 7 connected to the first main pipe 1 is prepared, it is connected to the first end 21 of the second main pipe 2 without checking the length. be able to. Therefore, construction becomes easy. Similarly, the positions of the second ends 12 and 22 of both pipes 1 and 2 are the same in the first direction, and the positions of the ends 31 and 41 of the branch pipes 3 and 4 are the same in the second direction . Thus, the connection of the tube members to these ends is also facilitated. In particular, even when the branch joint unit is turned over and used, the positions of both ends 12 and 22 of both pipes 1 and 2 do not change, which is extremely advantageous.

(5) In the past, T-shaped joints were connected to the supply pipe for cold water flow and the supply pipe for hot water, respectively, and cold water and hot water were supplied to the mixing faucet. In the branch joint unit, two T-shaped joints 10 and 20 are integrated. Therefore, there is no need to hold and operate each T-shaped joint by hand as in the prior art, and since two T-shaped joints 10 and 20 can be simultaneously held with one hand, installation becomes easy.

(6) When performing construction using two conventional T-shaped branch joints, after adjusting the distance between the branch pipes of each T-shaped branch joint, it is necessary to connect the pipe member extending to the mixing faucet there were. However, in the present embodiment, since the first branch pipe 3 is fixed to the second main pipe 2, both the first branch pipe 3 and the second branch pipe 4 are fixed to the second main pipe 2. It will be. Therefore, since the distance between the two branch pipes 3 and 4 is constant, it becomes unnecessary to adjust the distance between the branch pipes as in the prior art, and the construction becomes easy.

(7) In the conventional example, since the branch pipe of one T-shaped branch joint is configured to straddle the main pipe of the other T-shaped branch joint, a gap is generated between them, whereby the third There was a problem of becoming bulky in the direction. Therefore, it was necessary to form the cover which covers these T-shaped branch joints large. On the other hand, in the present embodiment, the outer peripheral surfaces of the first branch pipe 3 and the second main pipe 2 are fixed, and no gap is generated between them, so the height in the third direction can be reduced. it can. Therefore, the cover that accommodates the branch joint unit can also be made compact.

(8) In the branch joint unit according to the above embodiment, since only the first branch pipe 3 and a part of the second main pipe 2 are fixed, the contact portions of the two T-shaped joints 10 and 20 become smaller. There is. Therefore, it can suppress that the cold water which flows through the 1st main pipe 1 and the 1st branch pipe 3, and the hot water which flows through the 2nd main pipe 2 and the 2nd branch pipe 4 receive mutually influence. Therefore, it is possible to prevent the temperature of the cold water from rising and the temperature of the hot water from falling.

<4. Modified example>
As mentioned above, although one Embodiment of this invention was described, this invention is not limited to this, A various change is possible unless it deviates from the meaning. The following modifications can be combined as appropriate.

<4-1>
In the above embodiment, at the intersection portion 50, the first branch pipe 3 protrudes to one surface side of the reference surface S, and the second main pipe 2 protrudes to the other surface side of the reference surface S. Z1 and Z2 are configured to be the same, but can be different.

<4-2>
In the said embodiment, although the 1st branch pipe 3 and the 2nd main pipe 2 are being fixed with the 1st T-shaped branch joint 10 and the 2nd T-shaped branch joint 20, the site | part fixed is not limited to this. The outer peripheral surfaces of any of the tubes 1 to 4 other than this may be fixed, and the number of fixed places may be not one but a plurality of places. Also, instead of fixing the outer peripheral surfaces of the pipes, the pipes can be fixed by a member such as a bracket.

<4-3>
The diameter and length of each of the tubes 1 to 4 can be changed as appropriate, and as described above, the both ends 11 and 21 in the first direction or the both ends 12 and 22 in the second direction may not be aligned. Good. Moreover, the diameter of each pipe | tube 1-4 does not need to be the same, and you may combine the pipe | tube of a different diameter. Moreover, in each T-shaped branch joint, the connection position of the main pipes 1 and 2 and the branch pipes 3 and 4 is not particularly limited, and may be changed as appropriate.

<4-4>
In the above embodiment, for example, as shown in FIG. 6, the second main pipe 2 is configured to pass through the lower side of the figure in the third direction, and the first branch pipe 3 is configured to pass through the upper side of the figure. However, this may be reversed.

<4-5>
As shown in FIGS. 11 and 12, the branch joint unit according to the present invention can be accommodated in the cover 5. The cover 5 has a rectangular cylindrical first housing 51 for housing the first main pipe 1 and the second main pipe 2, and a rectangular cylindrical second housing for containing the first branch pipe 3 and the second branch pipe 4. It is comprised by connecting the accommodating part 52. As shown in FIG. Both sides of the first housing portion 51 are open, and the first supply pipe 7 and the second supply pipe 8 are inserted into the open portions, and the connection members 6 of the first main pipe 1 and the second main pipe 2 are respectively inserted. It is connected. On the other hand, one axial end of the second accommodation portion is connected to the vicinity of the intermediate portion in the first direction in the first accommodation portion, and the internal space of the first accommodation portion and the second accommodation portion communicate with each other. ing. Then, the other end of the second housing portion is open, and the pipe members 91 and 92 are inserted from here and connected to the connecting member 6 of the first branch pipe 3 and the second branch pipe 4. As shown in FIG. 12, the height L in the third direction of the first accommodation portion 51 and the second accommodation portion 53 is constant.

  Using such a cover 5 has the following advantages. As described above, at the intersection portion 50, the projection height Z1 of the axial center X3 of the first branch pipe 3 from the reference plane S and the projection height Z2 of the axial center X2 of the second main pipe 2 from the reference plane It is the same. Therefore, even if the diameter of the connection member 6 changes, the height in the third direction of the branch joint unit does not change. Therefore, it is not necessary to change the cover 5 for every connection member 6, and the same cover can be used. In addition, if the height of the cover 5 is substantially the same as the height H of the branch joint unit in the third direction, the cover 5 can be made compact. In particular, in the case of an apartment renovation in which the pipe is renewed without removing the wall, it is preferable to make the cover 5 compact because it is necessary to pipe on the surface side of the wall (the side facing the living space).

<4-6>
The first T-shaped joint (first joint body) and the second T-shaped joint (second joint body) may be configured to be distinguished so that the supply pipes 7, 8 and the pipe members 91, 92 are not erroneously connected. it can. For example, as shown in FIG. 13, the first T-shaped joint 10 and the second T-shaped joint 20 can be provided with different displays. In this example, in the first T-shaped joint 10, a T-shaped first mark 55 is provided at the connection portion between the first main pipe 1 and the first branch pipe 3, and in the second T-shaped joint 20, the second main pipe 2 and A T-shaped second mark 56 is provided at the connection portion of the second branch pipe 4. The first mark and the second mark have different shapes of characters. As described above, since different displays may be provided for the first T-shaped joint 10 and the second T-shaped joint 20, the type and position of the display are not particularly limited. Alternatively, the display may be provided on one side and not on the other.

  Further, the shapes of portions of the first T-shaped joint 10 and the second T-shaped joint 20 can be changed. For example, in the example of FIG. 14, the shapes of the end portions of the first T-shaped joint 10 and the second T-shaped joint 20 are different. That is, in the second T-shaped joint 20, hexagonal rings 57 are provided on the outer peripheries of both end portions 21 and 22 of the second main pipe 2, but such a ring is not provided in the first T-shaped joint 10 . Thereby, the 1st T-shaped joint 10 and the 2nd T-shaped joint 20 can be distinguished. In addition, the shape of at least one part of the 1st T-shaped joint 10 and the 2nd T-shaped joint 20 should just differ, and the position and the shape in particular are not limited.

<4-7>
In the above embodiment, the joint unit according to the present invention is connected to the mixing faucet from the pair of supply pipes 7 and 8 supplying the cold water and the hot water through the pipe members 91 and 92, respectively. It is not limited to. That is, it may be connected to separate taps or valves of separate hot and cold water. Moreover, it is applicable also to supply pipes other than cold water and hot water, and as long as it is a joint for branching respectively from two supply pipes which flow different types or the same type of fluid, it will be used in any application. be able to.

<4-8>
In the above embodiment, the first T-shaped joint 10 and the second T-shaped joint 20 are fixed, but they can be used separately. For example, the second main pipe 2 and the first branch pipe 3 fixed at the intersection portion 50 are separated, and as shown in FIG. 15, the first T-shaped joint 10 and the second T-shaped joint 20 are separate members. be able to. And when these are combined, it will become a cross section as shown in FIG.16 and FIG.17. FIG. 16 is a cross-sectional view of a branch joint unit in which the first T-shaped joint 10 and the second T-shaped joint 20 are assembled, taken along line A-A in FIG. On the other hand, FIG. 17 is the cross section which cut | disconnected the assembled branch coupling unit by the BB line of FIG. As shown in FIGS. 16 and 17, the second main pipe 2 and the first branch pipe 3 may be in contact with each other at the intersection portion 50, or may be formed with a gap. Moreover, even when the first T-shaped joint 10 and the second T-shaped joint 20 are separated, the above-described modifications of <4-1> to <4-7> can be appropriately applied.

<4-9>
The attachment surface of the joint unit of the present invention may include, for example, the front and back surfaces of a wall standing in the vertical direction, and a stepped surface (a surface that forms an exit corner and an entry corner) by columns and beams.

1 first main pipe 2 second main pipe 3 first branch pipe 4 second branch pipe 10 first T-shaped joint (first joint body)
20 Second T-shaped Joint (Second Joint Body)
50 intersections

Claims (9)

A first joint body having a first main pipe and a first branch pipe branched from the first main pipe;
A second joint body having a second main pipe and a second branch pipe branched from the second main pipe;
Equipped with
The first main pipe and the second main pipe extend in parallel,
The first branch pipe and the second branch pipe extend in parallel,
The first branch pipe and the second main pipe have crossing portions where they cross each other,
A portion of the axis of the first main pipe, a portion of the axis of the second main pipe other than the intersection portion, a portion of the axis of the first branch pipe other than the intersection portion, and a portion of the second branch pipe The axes are arranged substantially on the same plane,
A branch joint unit, wherein the first branch pipe is disposed on one side of the plane and the second main pipe is disposed on the other side of the plane at the intersection portion. At the intersection,
The height from the plane to the farthest outer circumferential surface of the first branch pipe and the height from the plane to the farthest outer circumferential surface of the second main pipe are substantially the same. Branch joint unit as described.   The branch joint unit according to claim 1, wherein the first branch pipe and the second main pipe are fixed at the intersection portion.   The branch joint unit according to claim 3, wherein outer peripheral surfaces of the first branch pipe and the second main pipe are integrated at the intersection portion.   The one end of the first main pipe and the one end of the second main pipe are positioned at the same distance from the first branch pipe. Branch joint unit.   The branch joint unit according to claim 5, wherein the first main pipe and the second main pipe have the same length.   The branch joint unit according to claim 5 or 6, wherein an end of the first branch pipe and an end of the second branch pipe are located at the same distance from the second main pipe.   The branch joint unit according to any one of claims 1 to 7, wherein the first joint body and the second joint body have at least one of different indications and shapes that distinguish them. And a cover for receiving the first joint body and the second joint body,
The branch joint unit according to any one of claims 1 to 8, wherein a height of the cover in a direction orthogonal to both the extending direction of the first main pipe and the extending direction of the first branch pipe is constant.