JP6955980B2 - Branch fitting unit - Google Patents

Description

The present invention relates to a branch joint unit.

For example, a T-shaped branch joint as shown in Patent Document 1 is used 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. In this example, the first T-shaped branch joint is connected to the first supply pipe through which cold water flows, the pipe member that branches to the water faucet of the mixing faucet is connected, and the second supply pipe through which hot water flows is connected to the second T-shaped branch joint. The branch joint was connected to connect the pipe member that branches to the hot water tap of the mixing faucet. 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, in the first T-shaped branch joint. The branch pipe branching from the first supply pipe is formed so as to extend over the second supply pipe to the mixing faucet side. Therefore, this branch pipe has an arc-shaped portion that goes over the second supply pipe.

Japanese Unexamined Patent Publication No. 2000-71341

However, the types of fluids flowing through the first supply pipe and the second supply pipe may change depending on the construction site. That is, cold water may flow or hot water may flow through the first supply pipe. On the other hand, in a mixed faucet, the positions of the faucet and the hot water faucet 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, which causes a problem that the preparation becomes complicated. The present invention has been made to solve the above problems, and an object of the present invention is to provide a branch joint unit that can be easily constructed even if the types of fluids flowing through the two supply pipes are exchanged. ..

The branch joint unit according to the present invention includes a first main pipe, a first joint body having a first branch pipe that branches from the first main pipe, a second main pipe, and a second main pipe that branches from the second main pipe. A second joint body having two branch pipes is provided, 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. The first branch pipe and the second main pipe have an intersecting portion where they intersect with each other, and the axial center of the first main pipe and the portion other than the intersecting portion in the axial center of the second main pipe. The portion other than the intersection in the axis of the first branch pipe and the axis of the second branch pipe are arranged on substantially the same plane, and in the intersection, the first branch pipe is The second main pipe is arranged on one surface side of the plane, and the second main pipe is arranged on the other surface side of the plane. It should be noted that the term "substantially the same plane" means not only the completely same plane but also a slight deviation from the plane, for example, about several mm.

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

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

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.

In the branch joint unit, one end of the first main pipe and one end of the second main pipe can be configured to be located 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.

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

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

The branch joint unit may further include a cover for accommodating the first joint body and the second joint body, and the cover may be provided in a direction in which the first main pipe extends and a direction in which the first branch pipe extends. The height in the direction orthogonal to both can be made constant.

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

It is a top view which shows one Embodiment of the branch joint unit which concerns on this invention. It is a figure which looked at the branch joint unit of FIG. 1 from the upper side. It is the figure which looked at the branch joint unit of FIG. 1 from the lower side. It is the figure which looked at the branch joint unit of FIG. 1 from the right side. It is the figure which looked at the branch joint unit of FIG. 1 from the left side. FIG. 1 is a cross-sectional view taken along the line BB of FIG. FIG. 1 is a cross-sectional view taken along the line AA of FIG. It is a top view which shows an example of the usage method of the branch joint unit of FIG. It is a top view which shows another example of the usage of the branch joint 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 another example of the branch joint unit which concerns on this invention. FIG. 11 is a cross-sectional view taken along the line CC of FIG. It is a top view which shows another example of the branch joint unit which concerns on this invention. It is a top view which shows another example of the branch joint unit which concerns on this invention. It is a top view which shows the example of the branch joint unit of this invention which shows the state which the 1st T-shaped joint (a) and the 2nd T-shaped joint (b) are separated. It is sectional drawing which cut the branch joint unit which combined the 1st T-shaped joint and the 2nd T-shaped joint of FIG. 15 by the line AA of FIG. FIG. 5 is a cross-sectional view of a branch joint unit in which a first T-shaped joint and a second T-shaped joint of FIG. 15 are combined, cut along the line BB of FIG.

Hereinafter, an embodiment of the branch joint unit according to the present invention will be described with reference to the drawings. 1 is a plan view of the branch joint unit, FIG. 2 is a view of the branch joint unit of FIG. 1 from above, FIG. 3 is a view of the branch joint unit of FIG. 1 from below, and FIG. 4 is FIG. 5 is a view of the branch joint unit of FIG. 1 from the right side, FIG. 5 is a view of the branch joint unit of FIG. 1 from the left side, FIG. 6 is a sectional view taken along line BB of FIG. It is a cross-sectional view of line A.

<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 both 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. Further, the left end of each of the mains 1 and 2 will be referred to as a first end 11 and 21, and the right end of each of the mains 1 and 2 will be referred to as a second end 12, 22. The first end portions 11,21 and the second end portions 12, 22 of the first main pipe 1 and the second main pipe 2 are arranged at the same position in the first direction, respectively. That is, the positions of the first end portions 11 and 21 and the second end portions 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 to form 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 arranged 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 each other to form a second T-shaped joint (second branch joint) 20. 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 arranged on the first end 21 side of the second main pipe 2 and extends in parallel with 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. The ends 31 and 41 of both branch pipes 3 and 4 are arranged at the same position in the second 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 can be made substantially the same.

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

Next, the intersecting 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 is 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 intersecting portion 50. The first branch pipe 3 projects at the intersection 50 so as to be convex in an arc shape on one side (right side in FIG. 7) in the third direction. On the other hand, the second main pipe 2 projects at the intersection 50 so as to be convex in an arc shape on the other side (lower side of FIG. 6) in the third direction. Then, at the intersecting portion 50, the protruding height Z1 of the first branch pipe 3 from the reference surface S and the protruding height Z2 of the second main pipe 2 from the reference surface S are the same.

Further, in the intersecting portion 50, the fixed portion between the first branch pipe 3 and the second main pipe 2 functions as a common wall 30 of both pipes 2 and 3. However, this common wall 30 is not 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, but is smaller than that. For example, assuming that 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 intersecting portion 50 can be 4 mm. The wall thickness of the common wall 30 should be greater than or equal to 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 reduce the heat transfer property as much as possible. It is preferable to have it.

Connecting members 6 are attached to both ends of the main pipes 1 and 2 and to the ends of the branch pipes 3 and 4, respectively. The configuration of these connecting members 6 is not particularly limited, but the pipe members can be detachably or non-detachably connected by a known structure such as a screw-in type or a plug-in type. Further, these connecting members 6 can be appropriately replaced according to the diameter of the connecting pipe member. Therefore, the connecting member 6 connecting the pipe members having a large diameter has a large outer diameter, and the connecting member 6 connecting the pipe members having a small diameter has a small outer diameter. In the present embodiment, the screw-in type connecting member 6 that cannot be removed with one touch is mainly shown, but in some drawings (for example, FIGS. 15 to 17), the removable plug-in type is shown. It may also indicate the connecting member 6.

The branch joint unit configured as described above can be formed of, for example, a metal material such as bronze (CAC406 or the like) or brass, or a thermoplastic resin material such as an olefin type. Moreover, these may be mixed.

Further, the branch joint unit can be manufactured by various methods, and for example, it can be integrally molded by casting. Therefore, the first T-shaped joint 10 and the second T-shaped joint 20 are completely integrated at the intersecting portion 50. In addition, the first T-shaped joint 10 and the second T-shaped joint 20 may be individually formed by casting or the like, and may be bonded or welded together at a place where they should intersect. Further, as described above, it can also be molded using a resin material.

<2. How to use the branch joint unit>
As shown in FIG. 8, for example, when the supply pipes 7 and 8 for flowing hot water and cold water are arranged in parallel, the branch joint unit according to the present embodiment branches from the supply pipes 7 and 8 (not shown). ) Can be used to supply hot water and cold water. First, the connecting members 6 at both ends of the first main pipe 1 are connected 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 hot water flows. Following this, 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 is mixed with the connecting member 6 at the end of the second branch line 4. The pipe member 92 connected to the hot water tap of the faucet is connected.

As a result, the cold water branches from the supply pipe 7 through which the cold water flows through the first main pipe 1, and the cold water is supplied to the faucet through the first branch pipe 3. Further, the hot water is branched from the supply pipe 8 through which the hot water flows through the second main pipe 2, and cold water is supplied to the hot water tap via the second branch line 4.

<3. Features>

(1) The mixed faucet is generally provided with a hot water faucet on the left side and a water faucet on the right side. On the other hand, in the supply pipes 7 and 8, the supply pipe 7 for cold water is arranged above, the supply pipe 8 for hot water is arranged below, and the positions above and below these are arranged. It can be the opposite. In this case, the branch joint unit according to the present embodiment is shown in FIG. 9 when the surface facing the mounting surface K is turned upside down from the state shown in FIG. That is, as shown in the figure, the first branch pipe 3 branching from the first main pipe 1 is arranged on the left side, and the hot water flowing through the first main pipe 1 is on the left side of the mixing faucet via the first branch pipe 3. It is supplied to the hot water tap. On the other hand, the second branch pipe 4 branching from the second main pipe 2 is arranged on the right side, and the cold water flowing through the second main pipe 2 is supplied to the water faucet on the right side of the mixing faucet via the second main pipe 4. NS. Therefore, even if the types of water flowing through the supply pipes 7 and 8, that is, the cold water and the hot water are replaced, it is possible to easily cope with the change in the arrangement of the supply pipes 7 and 8 simply by turning over the branch joint unit.

(2) In the above embodiment, as shown in FIGS. 6 and 7, the axes X1 to X4 of the pipes 1 to 4 are on the same plane (reference plane S), and the first branch pipes 3 and the second At the intersection 50 with the main pipe 2, the protrusion height Z1 from the reference surface S of the axis X3 of the first branch pipe 3 and the protrusion height Z2 from the reference surface of the axis X2 of the second main pipe 2 are It is the same. Therefore, as described above, even if the branch joint unit is turned upside down, the heights of the axial centers X1 to X4 of each pipe (the height of the reference surface S) from the mounting surface K do not change. Therefore, it is not necessary to change the positions of the supply pipes 7 and 8 and the pipe members 91 and 92 connected to the branch joint unit in the third direction.

(3) Further, since it is configured as described in (2) above, as long as the diameter of the connecting member 6 is smaller than the height H of the intersecting portion 50 in the third direction, whichever is used, as shown in FIG. Even if the connecting member 6 having such a diameter is attached, the height H of the branch joint unit in the third direction from the attachment surface K does not change. For example, whether the connecting member 6 having a small diameter as shown in FIG. 10A or the connecting member having a large diameter as shown in FIG. 10B is used, the branch joint unit H from the mounting surface K is used. Since the height of the pipes does not change, the heights of the axes X1 to X4 of each pipe (the height of the reference plane S) also do not change. Therefore, it is not necessary to change the positions of the supply pipes 7 and 8 and the pipe members 91 and 92 connected to the branch joint unit in the third direction. Further, with this configuration, the amount of protrusion of the second main pipe 2 and the first branch pipe 3 in the third direction becomes small, so that the flow of water can be made smooth, and the influence of a decrease in the flow velocity and the like can be exerted. It can be made smaller.

(4) In the branch joint unit, the first ends 12, 21 of both mains 1 and 2 are arranged at the same positions in the first direction. Therefore, in order to connect the supply pipes 7 and 8 to the first ends 12 and 21 of both main pipes 1 and 2 of this branch joint unit, check the length of the supply pipe 7 connected to the first main pipe 1. For example, it is not necessary to check the length of the supply pipe 8 connected to the second main pipe 2. That is, if a 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 portion 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 main pipes 1 and 2 are the same in the first direction, and the positions of the ends 31 and 41 of both branch pipes 3 and 4 are also the same in the second direction. .. Therefore, the connection of the pipe member to these ends is also facilitated. In particular, even when the branch joint unit is turned upside down and used, the positions of both ends 12 and 22 of both mains 1 and 2 do not change, which is extremely advantageous.

(5) Conventionally, a T-shaped joint is connected to a supply pipe through which cold water flows and a supply pipe through which hot water flows, respectively, so that cold water and hot water are supplied to the mixing faucet. In the branch joint unit, two T-shaped joints 10 and 20 are integrated. Therefore, unlike the conventional method, it is not necessary to hold each T-shaped joint by hand for work, and two T-shaped joints 10 and 20 can be held at the same time with one hand, which facilitates construction.

(6) When performing construction using two conventional T-shaped branch joints, it is necessary to adjust the distance between the branch pipes of each T-shaped branch joint and then 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 is not necessary to adjust the distance between the branch pipes as in the conventional case, 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 created between them, thereby forming a third. There was a problem that it became bulky in the direction. Therefore, it is necessary to form a large cover for covering these T-shaped branch joints. 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 to each other and no gap is formed between them, so that the height in the third direction can be reduced. can. Therefore, the cover for accommodating the branch joint unit can also be made compact.

(8) In the branch joint unit according to the above embodiment, since only a part of the first branch pipe 3 and the second main pipe 2 is fixed, the contact portions of the two T-shaped joints 10 and 20 become smaller. There is. Therefore, it is possible to prevent the cold water flowing through the first main pipe 1 and the first branch pipe 3 and the hot water flowing through the second main pipe 2 and the second branch pipe 4 from being affected by each other. Therefore, it is possible to prevent the temperature of the cold water from rising and the temperature of the hot water from falling.

<4. Modification example>
Although one embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the present invention. The following modifications can be combined as appropriate.

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

<4-2>
In the above embodiment, the first T-shaped branch joint 10 and the second T-shaped branch joint 20 are fixed to the first branch pipe 3 and the second main pipe 2, but the portion to be fixed is not limited to this. Other than this, the outer peripheral surfaces of any of the pipes 1 to 4 may be fixed to each other, and the fixing points may be not one but a plurality of points. Further, instead of fixing the outer peripheral surfaces of the pipes to each other, the pipes can be fixed to each other with a member such as a bracket.

<4-3>
The diameter and length of each of the pipes 1 to 4 can be changed as appropriate, and as described above, it is not necessary to align both ends 11 and 21 in the first direction and both ends 12 and 22 in the second direction. good. Further, the diameters of the pipes 1 to 4 do not have to be the same, and pipes having different diameters may be combined. Further, in each T-shaped branch joint, the connection position between the main pipes 1 and 2 and the branch pipes 3 and 4 is not particularly limited and can be changed as appropriate.

<4-4>
In the above embodiment, for example, as shown in FIG. 6, the second main pipe 2 passes through the lower side of the figure in the third direction, and the first branch pipe 3 passes 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 housed in the cover 5. The cover 5 has a square tubular first accommodating portion 51 accommodating the first main pipe 1 and the second main pipe 2, and a square tubular second accommodating the first branch pipe 3 and the second branch pipe 4. It is configured by connecting with the accommodating portion 52. Both sides of the first accommodating portion 51 are open, and the first supply pipe 7 and the second supply pipe 8 are inserted into the open portions, and the connecting members 6 of the first main pipe 1 and the second main pipe 2 are respectively opened. Be connected. On the other hand, one end in the axial direction of the second accommodating portion is connected to the vicinity of the intermediate portion in the first direction in the first accommodating portion, and the internal spaces of the first accommodating portion and the second accommodating portion communicate with each other. ing. Then, the other end of the second accommodating 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 of the first accommodating portion 51 and the second accommodating portion 53 in the third direction is constant.

Using such a cover 5 has the following advantages. As described above, at the intersecting portion 50, 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, even if the diameter of the connecting member 6 changes, the height of the branch joint unit in the third direction does not change. Therefore, it is not necessary to change the cover 5 for each connecting member 6, and the same cover can be used. Further, if the height of the cover 5 is made 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 renovation of a condominium where the piping is renewed without removing the wall, it is necessary to install the piping on the surface side of the wall (the side facing the living space), so it is preferable to make the cover 5 compact.

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

Further, the shapes of a part 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 shape of the end portion is different between the first T-shaped joint 10 and the second T-shaped joint 20. That is, the second T-shaped joint 20 is provided with hexagonal rings 57 on the outer periphery of both ends 21 and 22 of the second main pipe 2, but the first T-shaped joint 10 is not provided with such a ring. .. Thereby, the first T-shaped joint 10 and the second T-shaped joint 20 can be distinguished. The shape and shape of at least a part of the first T-shaped joint 10 and the second T-shaped joint 20 may be different, and the position and shape thereof are not particularly limited.

<4-7>
In the above embodiment, an example is shown in which the joint unit according to the present invention is connected from a pair of supply pipes 7 and 8 for supplying cold water and hot water to a mixing faucet via pipe members 91 and 92, respectively. Not limited to. That is, it may be connected to a single faucet or a valve for separate hot and cold water. It can also be applied to supply pipes other than cold water and hot water, and can be used for any purpose as long as it is a joint for branching from two supply pipes that flow different or similar fluids. 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 these can also be used separately. For example, the second main pipe 2 and the first branch pipe 3 fixed at the intersecting portion 50 are separated, and as shown in FIG. 15, the first T-shaped joint 10 and the second T-shaped joint 20 are made into separate members. be able to. When these are combined, the cross section is as shown in FIGS. 16 and 17. FIG. 16 is a cross section of a branch joint unit in which the first T-shaped joint 10 and the second T-shaped joint 20 are assembled, cut along the line AA of FIG. On the other hand, FIG. 17 is a cross section of the assembled branch joint unit cut along the line BB of FIG. As shown in FIGS. 16 and 17, at the intersection 50, the second main pipe 2 and the first branch pipe 3 may be in contact with each other, or may be formed so as to be arranged with a gap. Further, even when the first T-shaped joint 10 and the second T-shaped joint 20 are separated, the above-described modified examples of <4-1> to <4-7> can be appropriately applied.

<4-9>
Examples of the mounting surface of the joint unit of the present invention include the front surface and the back surface of a wall standing in the vertical direction, and a stepped surface (a surface forming an outside corner and an inside corner) due to columns and beams.

1 1st main pipe 2 2nd main pipe 3 1st branch pipe 4 2nd branch pipe 10 1st T-shaped joint (1st joint body)
20 2nd T-shaped joint (2nd joint body)
50 intersection

Claims (9)

The first main pipe and the first joint body having the first branch pipe branching from the first main pipe,
A second main pipe and a second joint body having a second branch pipe branching from the second main pipe,
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,
It has an intersection where the first branch pipe and the second main pipe intersect with each other.
The axis of the first main pipe, the portion other than the intersection portion in the axis of the second main pipe, the portion other than the intersection portion in the axis of the first branch pipe, and the second branch pipe. The axis is arranged on substantially the same plane,
At the intersection
The first branch pipe is arranged on one surface side of the plane so as to protrude from the outer peripheral surface of the second main pipe.
A branch joint unit in which the second main pipe is arranged on the other surface side of the plane so as to protrude from the outer peripheral surface of the first branch pipe.
At the intersection
According to claim 1, the height from the plane to the farthest outer peripheral surface of the first branch pipe and the height from the plane to the farthest outer peripheral surface of the second main pipe are substantially the same. The described branch joint unit. The branch joint unit according to claim 1 or 2, wherein the first branch pipe and the second main pipe are fixed at the intersection. The branch joint unit according to claim 3, wherein the outer peripheral surfaces of the first branch pipe and the second main pipe are integrated at the intersection. The invention according to any one of claims 1 to 4, wherein one end of the first main pipe and one end of the second main pipe are located 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 the end of the first branch pipe and the 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 for distinguishing them. A cover for accommodating the first joint body and the second joint body is further provided.
The branch joint unit according to any one of claims 1 to 8, wherein the cover has a constant height in a direction orthogonal to both the extending direction of the first main pipe and the extending direction of the first branch pipe.

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